:root {
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    --border-radius: 6px;
    --card-shadow: 0 2px 5px rgba(0,0,0,0.1);
    --transition-speed: 0.25s;
    --transition-timing: ease-out;
    --spacing-unit: 1rem;
    --sidebar-width: 280px;
    --header-height: 61px;
}

[data-theme="light"] {
    --bg-color: #f0f2f5;
    --card-bg: #ffffff;
    --border-color: #d0d7de;
    --text-color: #1c1e21;
    --text-secondary: #606770;
    --primary-blue: #1877f2;
    --secondary-blue: #42b72a;
    --accent-color: #f7b928;
    --success-color: #42b72a;
    --error-color: #fa383e;
    --placeholder-color: #a0a9b4;
    --sidebar-bg: #f6f8fa;
    --header-bg: #ffffff;
    --flashcard-bg: linear-gradient(135deg, #ffffff, #e9ebee);
    --progress-bar-bg: linear-gradient(90deg, #68b1fa 0%, var(--primary-blue) 100%);
    --widget-bg: #ffffff;
    --success-rgb: 66, 183, 42;
    --primary-blue-rgb: 24, 119, 242;
    --error-rgb: 250, 56, 62;
    --accent-rgb: 247, 185, 40;
}

[data-theme="medium"] {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --border-color: #30363d;
    --text-color: #c9d1d9;
    --text-secondary: #8b949e;
    --primary-blue: #58a6ff;
    --secondary-blue: #79c0ff;
    --accent-color: #ffa657;
    --success-color: #56d364;
    --error-color: #f85149;
    --placeholder-color: #484f58;
    --sidebar-bg: #0d1117;
    --header-bg: #161b22;
    --flashcard-bg: linear-gradient(135deg, #1e242e, #161b22);
    --progress-bar-bg: linear-gradient(90deg, var(--secondary-blue) 0%, var(--primary-blue) 100%);
    --widget-bg: #161b22;
    --success-rgb: 86, 211, 100;
    --primary-blue-rgb: 88, 166, 255;
    --error-rgb: 248, 81, 73;
    --accent-rgb: 255, 166, 87;
}

[data-theme="dark"] {
    --bg-color: #010409;
    --card-bg: #0d1117;
    --border-color: #21262d;
    --text-color: #e6edf3;
    --text-secondary: #7d8590;
    --primary-blue: #409eff;
    --secondary-blue: #6ab0f3;
    --accent-color: #f778ba;
    --success-color: #3fb950;
    --error-color: #e85349;
    --placeholder-color: #30363d;
    --sidebar-bg: #010409;
    --header-bg: #0d1117;
    --flashcard-bg: linear-gradient(135deg, #111821, #0d1117);
    --progress-bar-bg: linear-gradient(90deg, #6ab0f3 0%, #409eff 100%);
    --widget-bg: #0d1117;
    --success-rgb: 63, 185, 80;
    --primary-blue-rgb: 64, 158, 255;
    --error-rgb: 232, 83, 73;
    --accent-rgb: 247, 120, 186;
}

[data-theme="cyber"] {
    --bg-color: #0a0f2a;
    --card-bg: #1a1f3a;
    --border-color: #4a4f6a;
    --text-color: #00f0ff;
    --text-secondary: #80bfff;
    --primary-blue: #ff00ff;
    --secondary-blue: #00ffff;
    --accent-color: #f0ff00;
    --success-color: #00ff00;
    --error-color: #ff4040;
    --placeholder-color: #505f7a;
    --sidebar-bg: #0a0f2a;
    --header-bg: #1a1f3a;
    --flashcard-bg: linear-gradient(135deg, #2a2f5a, #1a1f3a);
    --progress-bar-bg: linear-gradient(90deg, #00ffff 0%, #ff00ff 100%);
    --widget-bg: #1a1f3a;
    --card-shadow: 0 0 8px rgba(255, 0, 255, 0.4), 0 0 3px rgba(0, 255, 255, 0.2);
    --success-rgb: 0, 255, 0;
    --primary-blue-rgb: 255, 0, 255;
    --error-rgb: 255, 64, 64;
    --accent-rgb: 240, 255, 0;
    --border-radius: 2px;
}

[data-theme="black"] {
    --bg-color: #050505;
    --card-bg: #111111;
    --border-color: #282828;
    --text-color: #e0e0e0;
    --text-secondary: #777777;
    --primary-blue: #bbbbbb;
    --secondary-blue: #aaaaaa;
    --accent-color: #cccccc;
    --success-color: #dddddd;
    --error-color: #ff9999;
    --placeholder-color: #333333;
    --sidebar-bg: #000000;
    --header-bg: #111111;
    --flashcard-bg: linear-gradient(135deg, #1a1a1a, #111111);
    --progress-bar-bg: linear-gradient(90deg, #aaaaaa 0%, #bbbbbb 100%);
    --widget-bg: #111111;
    --success-rgb: 221, 221, 221;
    --primary-blue-rgb: 187, 187, 187;
    --error-rgb: 255, 153, 153;
    --accent-rgb: 204, 204, 204;
    --border-radius: 8px;
    --card-shadow: 0 1px 2px rgba(255,255,255,0.05);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; font-family: var(--font-family); background-color: var(--bg-color); color: var(--text-color); line-height: 1.6; font-size: 14px; overflow: hidden; }
body { display: flex; flex-direction: column; }
body.onboarding-active { overflow: hidden; }

header { background-color: var(--header-bg); padding: calc(var(--spacing-unit) * 0.8) calc(var(--spacing-unit) * 2); border-bottom: 1px solid var(--border-color); text-align: center; position: relative; z-index: 1070; display: flex; align-items: center; justify-content: space-between; flex-shrink: 0; height: var(--header-height); width: 100%; }
header h1.main-title { color: var(--primary-blue); font-size: 1.6rem; font-weight: 600; display: inline-flex; align-items: center; gap: 0.6rem; margin: 0 auto; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex-grow: 0; flex-shrink: 1; min-width: 0; }
/* line-height: 1;  */
.main-title .title-text { display: inline; }
.main-title .title-text-short { display: none; }

.header-controls { display: flex; align-items: center; gap: var(--spacing-unit); flex-shrink: 0; margin-left: 15px; margin-right: 15px;}
.desktop-sidebar-toggle { background: none; border: 1px solid var(--border-color); color: var(--text-secondary); font-size: 1rem; cursor: pointer; padding: 0.4rem 0.7rem; border-radius: var(--border-radius); transition: all var(--transition-speed) var(--transition-timing); position: absolute; top: 50%; transform: translateY(-50%); z-index: 11; }
.desktop-sidebar-toggle:hover { background-color: var(--card-bg); color: var(--primary-blue); border-color: var(--primary-blue); }
.desktop-sidebar-toggle.hidden-via-js { display: none; }
#left-desktop-toggle { left: var(--spacing-unit); }
#right-desktop-toggle { right: var(--spacing-unit); }

.lang-switcher { position: relative; }
#lang-dropdown { display: none; position: absolute; right: 0; top: 100%; background-color: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--border-radius); box-shadow: 0 3px 6px rgba(0,0,0,0.2); z-index: 1090; min-width: 100px; padding: 0.5rem 0; max-height: 200px; overflow-y: auto; }
#lang-dropdown.visible { display: block; }
#lang-dropdown button { display: block; width: 100%; padding: 0.5rem 1rem; background: none; border: none; color: var(--text-color); text-align: left; cursor: pointer; font-size: 0.9rem; }
#lang-dropdown button:hover { background-color: var(--primary-blue); color: #fff; }
#lang-dropdown button.active { font-weight: bold; background-color: rgba(var(--primary-blue-rgb), 0.2); }

.header-icon-link { background: none; border: none; color: var(--text-secondary); font-size: 1.3rem; cursor: pointer; transition: color var(--transition-speed), transform var(--transition-speed); padding: 0.2rem; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; line-height: 1; vertical-align: middle; }
.header-icon-link:hover { color: var(--primary-blue); transform: scale(1.1); }
.header-controls button, .header-controls .header-icon-link { vertical-align: middle; }
#theme-toggle { width: 30px; text-align: center; }
#theme-toggle:hover { transform: rotate(15deg); }
#tour-trigger:hover { color: var(--primary-blue); }

.main-container { display: flex; flex: 1; overflow: hidden; position: relative; }
.main-content { flex: 1; padding: calc(var(--spacing-unit) * 1.8); display: flex; flex-direction: column; overflow-y: auto; gap: calc(var(--spacing-unit) * 1.8); transition: margin-left var(--transition-speed) var(--transition-timing), margin-right var(--transition-speed) var(--transition-timing); width: 100%; }
.left-sidebar, .right-sidebar { width: var(--sidebar-width); background-color: var(--sidebar-bg); padding: calc(var(--spacing-unit) * 1.5); display: flex; flex-direction: column; gap: calc(var(--spacing-unit) * 1.8); overflow-y: auto; border-right: 1px solid var(--border-color); flex-shrink: 0; transition: transform var(--transition-speed) var(--transition-timing); position: fixed; top: var(--header-height); bottom: 0; z-index: 5; transform: translateX(0); }
.left-sidebar { left: 0; border-right: 1px solid var(--border-color); border-left: none;}
.right-sidebar { right: 0; border-left: 1px solid var(--border-color); border-right: none; }

.left-sidebar.collapsed { transform: translateX(calc(-1 * var(--sidebar-width) - 1px)); }
.right-sidebar.collapsed { transform: translateX(calc(var(--sidebar-width) + 1px)); }

.panel { background-color: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: calc(var(--spacing-unit) * 1.3); box-shadow: var(--card-shadow); }
.panel h2, .panel h3 { color: var(--secondary-blue); margin-bottom: calc(var(--spacing-unit) * 1.2); padding-bottom: calc(var(--spacing-unit) * 0.6); font-size: 1.2rem; font-weight: 600; border-bottom: 1px solid var(--border-color); display: flex; align-items: center; gap: calc(var(--spacing-unit) * 0.5); }
.panel h2 i, .panel h3 i { color: var(--text-secondary); }

.left-sidebar .panel { background-color: var(--widget-bg); box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
.left-sidebar .panel h3 { font-size: 1.1rem; }

label { display: block; margin-bottom: calc(var(--spacing-unit) * 0.5); font-weight: 500; color: var(--text-secondary); font-size: 0.9rem; }
input[type="text"], input[type="password"], input[type="number"], textarea, select { width: 100%; padding: calc(var(--spacing-unit) * 0.7) calc(var(--spacing-unit) * 0.9); margin-bottom: calc(var(--spacing-unit) * 0.9); background-color: var(--bg-color); border: 1px solid var(--border-color); color: var(--text-color); border-radius: var(--border-radius); font-size: 0.95rem; transition: border-color var(--transition-speed), box-shadow var(--transition-speed); }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--primary-blue); box-shadow: 0 0 0 3px rgba(var(--primary-blue-rgb), 0.3); }
input:focus-visible, textarea:focus-visible, select:focus-visible, button:focus-visible, a:focus-visible, [tabindex="0"]:focus-visible { outline: 2px solid var(--primary-blue); outline-offset: 2px; }
textarea { resize: vertical; min-height: 80px; }
input::placeholder, textarea::placeholder { color: var(--placeholder-color); }
input[type="file"] { display: block; margin-bottom: calc(var(--spacing-unit) * 0.9); color: var(--text-secondary); font-size: 0.9rem; padding: 7px 11px; border: 1px solid var(--border-color); border-radius: var(--border-radius); background-color: var(--card-bg); transition: background-color var(--transition-speed); }
input[type="file"]:hover { background-color: rgba(var(--text-color), 0.05); }
input[type="file"]::file-selector-button { background-color: var(--primary-blue); color: white; border: none; padding: 6px 11px; border-radius: 4px; cursor: pointer; margin-right: 9px; font-size: 0.9rem; transition: background-color var(--transition-speed); }
input[type="file"]::file-selector-button:hover { background-color: color-mix(in srgb, var(--primary-blue) 80%, black); }
select { appearance: none; background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%238b949e' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e"); background-position: right 0.6rem center; background-repeat: no-repeat; background-size: 1.5em 1.5em; padding-right: 2.8rem; }
.checkbox-label { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.5rem; font-size: 0.9rem; cursor: pointer; }
.checkbox-label input[type="checkbox"] { opacity: 0; position: absolute; width: 0; height: 0; }
.checkbox-custom { display: inline-block; width: 18px; height: 18px; background-color: var(--bg-color); border: 1px solid var(--border-color); border-radius: 3px; transition: background-color 0.2s, border-color 0.2s; position: relative; margin-right: 0.5rem; flex-shrink: 0; }
.checkbox-label input[type="checkbox"]:checked + .checkbox-custom { background-color: var(--primary-blue); border-color: var(--primary-blue); }
.checkbox-custom::after { content: ''; position: absolute; display: none; left: 6px; top: 2px; width: 5px; height: 10px; border: solid white; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after { display: block; }
.checkbox-label:hover .checkbox-custom { border-color: var(--secondary-blue); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: calc(var(--spacing-unit) * 0.5); padding: calc(var(--spacing-unit) * 0.7) calc(var(--spacing-unit) * 1.3); background-color: var(--primary-blue); color: #fff; border: 1px solid var(--primary-blue); border-radius: var(--border-radius); cursor: pointer; font-size: 0.95rem; font-weight: 500; text-align: center; transition: all var(--transition-speed) var(--transition-timing); user-select: none; }
.btn:hover:not(:disabled) { background-color: color-mix(in srgb, var(--primary-blue) 85%, black); border-color: color-mix(in srgb, var(--primary-blue) 85%, black); transform: translateY(-1px); box-shadow: 0 2px 4px rgba(0,0,0,0.15); }
.btn:active:not(:disabled) { transform: scale(0.97); box-shadow: none; }
.btn:disabled { background-color: var(--placeholder-color); border-color: var(--placeholder-color); cursor: not-allowed; opacity: 0.6; }
.btn-secondary { background-color: var(--secondary-blue); border-color: var(--secondary-blue); color: var(--bg-color); }
.btn-secondary:hover:not(:disabled) { background-color: color-mix(in srgb, var(--secondary-blue) 85%, black); border-color: color-mix(in srgb, var(--secondary-blue) 85%, black); }
.btn-danger { background-color: var(--error-color); border-color: var(--error-color); }
.btn-danger:hover:not(:disabled) { background-color: color-mix(in srgb, var(--error-color) 85%, black); border-color: color-mix(in srgb, var(--error-color) 85%, black); }
.btn-success { background-color: var(--success-color); border-color: var(--success-color); }
.btn-success:hover:not(:disabled) { background-color: color-mix(in srgb, var(--success-color) 85%, black); border-color: color-mix(in srgb, var(--success-color) 85%, black); }
.btn-accent { background-color: var(--accent-color); border-color: var(--accent-color); color: var(--bg-color); }
.btn-accent:hover:not(:disabled) { background-color: color-mix(in srgb, var(--accent-color) 85%, black); border-color: color-mix(in srgb, var(--accent-color) 85%, black); }
.btn-small { padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 0.9); font-size: 0.85rem; line-height: 1.4;}
.btn-icon { padding: calc(var(--spacing-unit) * 0.6); display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; }
#set-goal-btn { width: 30px; height: 30px; padding: 0; } #set-goal-btn i { margin: auto; }
.btn-outline { background-color: transparent; border: 1px solid var(--border-color); color: var(--text-secondary);  }
.btn-outline:hover:not(:disabled) { background-color: var(--card-bg); border-color: var(--primary-blue); color: var(--primary-blue); transform: translateY(-1px); }
.btn-outline.active { background-color: rgba(var(--primary-blue-rgb), 0.1); border-color: var(--primary-blue); color: var(--primary-blue); }
.btn-outline[disabled] { background-color: transparent; border-color: var(--border-color); color: var(--text-secondary); opacity: 0.5; cursor: not-allowed; }


#language-feature { padding: calc(var(--spacing-unit) * 0.8) 0; margin-top: calc(var(--spacing-unit) * 0.8); border-top: 1px solid var(--border-color); }
.feature-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: calc(var(--spacing-unit) * 0.8); }
.feature-label { font-weight: 600; color: var(--text-color); display: inline-flex; align-items: center; gap: calc(var(--spacing-unit) * 0.6); margin-bottom: 0; font-size: 1rem; cursor: pointer; user-select: none; transition: color var(--transition-speed); }
#language-mode-globe { font-size: 1.3em; color: var(--text-secondary); text-shadow: none; filter: none; transition: color var(--transition-speed) ease-out, text-shadow 0.4s ease-out, filter 0.4s ease-out, transform var(--transition-speed) ease-out; }
.feature-label.active #language-mode-globe { color: var(--success-color); text-shadow: 0 0 5px var(--success-color), 0 0 10px rgba(var(--success-rgb), 0.6); transform: rotate(10deg) scale(1.05); }
#language-mode-indicator { display: inline-block; font-size: 1.1em; margin-left: calc(var(--spacing-unit) * 0.3); width: 1.2em; text-align: center; transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55), color 0.3s ease-out, opacity 0.3s ease-out; transform-origin: center center; }
.feature-label.active #language-mode-indicator { color: var(--success-color); transform: scale(1) rotate(0deg); opacity: 1; }
.feature-label:not(.active) #language-mode-indicator { color: var(--error-color); transform: scale(0.8) rotate(180deg); opacity: 0.8; }
.settings { max-height: 0; overflow: hidden; transition: max-height var(--transition-speed) ease-out, padding-top var(--transition-speed) ease-out, opacity var(--transition-speed) ease-out; padding-top: 0; opacity: 0; }
.settings.show { max-height: 300px; padding-top: calc(var(--spacing-unit) * 0.5); opacity: 1; overflow: visible; }
#language-settings .language-input-container { margin-bottom: calc(var(--spacing-unit) * 0.9); }
#language-settings .language-input-container:last-child { margin-bottom: 0; }

#content-generator h2 { cursor: pointer; display: flex; align-items: center; }
#content-generator h2 .toggle-icon { margin-left: auto; transition: transform var(--transition-speed); }
#content-generator h2.folded .toggle-icon { transform: rotate(-90deg); }
#generator-content-wrapper { transition: opacity var(--transition-speed), max-height var(--transition-speed) ease-in-out; overflow: hidden; max-height: 1000px; opacity: 1; }
#generator-content-wrapper.folded { max-height: 0; opacity: 0; margin-top: calc(var(--spacing-unit) * -1); padding-top: 0; padding-bottom: 0; border-top: none; }

#learning-modes-selector { display: flex; flex-wrap: wrap; gap: calc(var(--spacing-unit) * 0.7); margin-bottom: var(--spacing-unit); border-bottom: 1px solid var(--border-color); padding-bottom: var(--spacing-unit); }
#global-mode-options { margin-bottom: var(--spacing-unit); padding-bottom: var(--spacing-unit); border-bottom: 1px solid var(--border-color); display: flex; gap: var(--spacing-unit); align-items: center; flex-wrap: wrap; }
#global-mode-options fieldset { border: none; padding: 0; margin: 0; display: flex; gap: var(--spacing-unit); align-items: center; flex-wrap: wrap; }
#global-mode-options legend { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0; }
#global-mode-options label { margin-bottom: 0; white-space: nowrap; }
#global-mode-options select, #global-mode-options input[type="number"] { width: auto; min-width: 100px; margin-bottom: 0; }

.mode-content { opacity: 0; transform: translateX(-20px); transition: opacity var(--transition-speed) var(--transition-timing), transform var(--transition-speed) var(--transition-timing); position: absolute; width: calc(100% - (var(--spacing-unit) * 3.6)); pointer-events: none; visibility: hidden; }
.mode-content.active { opacity: 1; transform: translateX(0); position: relative; width: auto; pointer-events: auto; visibility: visible; }
#mode-content-area { position: relative; min-height: 300px; }
#select-mode-prompt { color: var(--text-secondary); text-align: center; padding: calc(var(--spacing-unit) * 2) 0; display: flex; flex-direction: column; align-items: center; gap: var(--spacing-unit); transition: opacity 0.3s ease-out, height 0.3s ease-out; opacity: 1; height: auto; overflow: hidden; }
#select-mode-prompt.hidden { opacity: 0; height: 0; padding: 0; margin: 0; pointer-events: none; }
#select-mode-prompt i { font-size: 2.5rem; color: var(--placeholder-color); }

#curation-mode { padding-top: var(--spacing-unit); }
#curation-list { list-style: none; padding: 0; margin-bottom: var(--spacing-unit); max-height: 400px; overflow-y: auto; border: 1px solid var(--border-color); border-radius: var(--border-radius); background-color: var(--bg-color); }
.curation-item { display: flex; align-items: center; gap: calc(var(--spacing-unit) * 0.8); padding: calc(var(--spacing-unit) * 0.8); border-bottom: 1px solid var(--border-color); transition: background-color var(--transition-speed); cursor: default; }
.curation-item:last-child { border-bottom: none; }
.curation-item-label { flex-grow: 1; display: flex; align-items: center; gap: 0.8rem; margin-bottom: 0; cursor: pointer; }
.curation-item-label:hover { background-color: rgba(var(--primary-blue-rgb), 0.05); }
.curation-item img { width: 32px; height: 32px; object-fit: cover; border-radius: 4px; background-color: var(--card-bg); flex-shrink: 0; }
.curation-item .item-text { flex-grow: 1; display: flex; flex-direction: column; gap: 2px; pointer-events: none; }
.curation-item .item-original { font-weight: 500; font-size: 0.95rem; }
.curation-item .item-translation { font-size: 0.9rem; color: var(--text-secondary); }
.curation-item .item-category { font-size: 0.8rem; color: var(--accent-color); font-style: italic; }
.curation-item .btn-icon { padding: 4px; flex-shrink: 0; margin-left: auto; }
.curation-item.hidden { display: none; }
.curation-item.empty-state { padding: 1rem; border: none; justify-content: center; }
#curation-list .empty-state i { font-size: 1.5rem; margin-bottom: 0.5rem; }
.curation-controls { display: flex; justify-content: space-between; align-items: center; gap: var(--spacing-unit); flex-wrap: wrap; margin-top: var(--spacing-unit); }
#add-custom-word-form { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1rem; padding: 1rem; border: 1px dashed var(--border-color); border-radius: var(--border-radius); background-color: var(--bg-color); }
#add-custom-word-form.hidden { display: none; }
#add-custom-word-form input, #add-custom-word-form button { margin-bottom: 0; }
#add-custom-word-form input { flex: 1 1 150px; }

#match-master-area { display: grid; gap: calc(var(--spacing-unit) * 0.9); margin: var(--spacing-unit) auto; max-width: 600px; }
.match-item { aspect-ratio: 1 / 1; background-color: var(--card-bg); border: 2px solid var(--border-color); border-radius: var(--border-radius); cursor: pointer; transition: all var(--transition-speed) var(--transition-timing); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: calc(var(--spacing-unit) * 0.5); overflow: hidden; position: relative; }
.match-item:hover { border-color: var(--secondary-blue); transform: translateY(-2px); box-shadow: 0 3px 6px rgba(0,0,0,0.1); }
.match-item.selected { border-color: var(--accent-color); border-width: 3px; transform: scale(1.05); background-color: color-mix(in srgb, var(--card-bg) 80%, black); box-shadow: 0 0 10px var(--accent-color); }
.match-item.matched { opacity: 0; transform: scale(0.8) rotate(10deg); pointer-events: none; transition: opacity 0.5s ease, transform 0.5s ease;}
.match-item.incorrect-flash { animation: incorrectFlash 0.6s ease; }
.match-item-image { width: 60%; height: 60%; object-fit: cover; border-radius: 4px; margin-bottom: calc(var(--spacing-unit) * 0.4); background-color: var(--bg-color); display: none; }
.match-item-image.visible { display: block; }
.match-item-text { font-size: 0.9rem; font-weight: 500; color: var(--text-color); }
.match-item-text.hidden { display: none; }
.match-item-loading { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); font-size: 1.6em; color: var(--text-secondary); animation: spin 1s linear infinite; }
#match-timer { font-size: 1.2rem; font-weight: 600; color: var(--accent-color); margin-bottom: var(--spacing-unit); text-align: center; }
#match-feedback { min-height: 1.6em; margin-top: var(--spacing-unit); font-weight: 500;}

.flashcard-container { perspective: 1200px; max-width: 380px; margin: 0 auto; transition: opacity 0.3s, transform 0.3s; }
.flashcard-container.hidden { opacity: 0; transform: scale(0.9); pointer-events: none; height: 0; }
.flashcard { width: 100%; aspect-ratio: 1 / 1; position: relative; transform-style: preserve-3d; transition: transform 0.7s cubic-bezier(0.4, 0.0, 0.2, 1); cursor: pointer; border-radius: var(--border-radius); box-shadow: 0 5px 15px rgba(0,0,0,0.2); }
.flashcard.is-flipped { transform: rotateY(180deg); }
.flashcard-face { position: absolute; width: 100%; height: 100%; backface-visibility: hidden; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: calc(var(--spacing-unit) * 1.5); background: var(--flashcard-bg); border: 1px solid var(--border-color); border-radius: var(--border-radius); overflow: hidden; text-align: center; box-shadow: inset 0 0 10px rgba(0,0,0,0.1); }
.flashcard-back { transform: rotateY(180deg); }
.flashcard-image { width: 50%; max-height: 100%; object-fit: contain; border-radius: 4px; margin-bottom: calc(var(--spacing-unit)); background-color: rgba(0,0,0,0.1); }
.flashcard-image.hidden { display: none; }
.flashcard-text { font-size: 1.6rem; font-weight: 600; color: var(--text-color); margin-bottom: 0.6rem; }
.flashcard-example { font-size: 0.95rem; color: var(--text-secondary); margin-top: calc(var(--spacing-unit)); font-style: italic; }
.flashcard-pronunciation { font-size: 1rem; color: var(--text-secondary); margin-top: 0.3rem; }
.flashcard-controls { display: flex; justify-content: center; gap: calc(var(--spacing-unit) * 1.0); margin-top: var(--spacing-unit); flex-wrap: wrap; max-width: 380px; margin: calc(var(--spacing-unit) * 1.3) auto 0 auto; }
.flashcard-controls.hidden { display: none; }
#flashcard-progress { text-align: center; margin: calc(var(--spacing-unit)) 0 calc(var(--spacing-unit) * 0.8) 0; font-size: 0.9rem; color: var(--text-secondary); }
#flashcard-answer-input { width: 90%; margin: var(--spacing-unit) auto 0 auto; display: block; }
#flashcard-answer-input.hidden { display: none; }
#flashcard-answer-input.correct { border-color: var(--success-color); box-shadow: 0 0 0 3px rgba(var(--success-rgb), 0.3); }
#flashcard-answer-input.incorrect { border-color: var(--error-color); box-shadow: 0 0 0 3px rgba(var(--error-rgb), 0.3); }
#undo-flashcard-btn { border-color: var(--text-secondary); color: var(--text-secondary); }
#undo-flashcard-btn:hover:not(:disabled) { border-color: var(--accent-color); color: var(--accent-color); background-color: rgba(var(--accent-rgb), 0.1); }
#undo-flashcard-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.flashcard-speaker-controls { text-align: center; margin-top: 0.8rem; display: flex; justify-content: center; gap: 1rem; }

.quiz-question { margin-bottom: calc(var(--spacing-unit) * 1.3); font-size: 1.2rem; font-weight: 500; display: flex; align-items: center; gap: 0.5rem; }
.quiz-options { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: calc(var(--spacing-unit) * 0.9); }
.quiz-option { width: 100%; text-align: center; padding: calc(var(--spacing-unit) * 0.9); background-color: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--border-radius); cursor: pointer; transition: all var(--transition-speed) var(--transition-timing); color: var(--text-color); font-size: 0.95rem; }
.quiz-option:hover:not(:disabled) { background-color: color-mix(in srgb, var(--card-bg) 90%, white); border-color: var(--secondary-blue); transform: translateY(-1px); }
.quiz-option:disabled { opacity: 0.6; cursor: not-allowed; }
.quiz-option.correct { background-color: var(--success-color); color: #fff; border-color: var(--success-color); }
.quiz-option.incorrect { background-color: var(--error-color); color: #fff; border-color: var(--error-color); }
#quiz-feedback { margin-top: calc(var(--spacing-unit) * 1.3); font-weight: 500; min-height: 1.6em; }
#quiz-fill-area { display: flex; align-items: center; gap: calc(var(--spacing-unit) * 0.9); margin-top: var(--spacing-unit); }
#quiz-fill-area.hidden { display: none; }
#quiz-fill-input { flex-grow: 1; margin-bottom: 0; }
#quiz-fill-input.correct { border-color: var(--success-color); box-shadow: 0 0 0 3px rgba(var(--success-rgb), 0.3); }
#quiz-fill-input.incorrect { border-color: var(--error-color); box-shadow: 0 0 0 3px rgba(var(--error-rgb), 0.3); }
#quiz-score { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: calc(var(--spacing-unit) * 0.9); }

#sentence-prompt { margin-bottom: calc(var(--spacing-unit) * 0.9); font-size: 1.05rem; color: var(--text-secondary); }
#sentence-builder-area { min-height: 80px; background-color: var(--bg-color); border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: calc(var(--spacing-unit) * 1.3); margin-bottom: calc(var(--spacing-unit) * 1.3); display: flex; flex-wrap: wrap; gap: calc(var(--spacing-unit) * 0.5); align-items: center; }
#sentence-words-pool { display: flex; flex-wrap: wrap; gap: calc(var(--spacing-unit) * 0.7); margin-bottom: calc(var(--spacing-unit) * 1.3); padding: calc(var(--spacing-unit) * 0.9); background-color: var(--bg-color); border: 1px solid var(--border-color); border-radius: var(--border-radius); min-height: 60px; transition: background-color var(--transition-speed); }
.sentence-word { background-color: var(--secondary-blue); color: var(--bg-color); padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 0.9); border-radius: var(--border-radius); cursor: grab; user-select: none; transition: all var(--transition-speed) var(--transition-timing); font-weight: 500; margin: 2px; }
.sentence-word:hover { transform: translateY(-2px); box-shadow: 0 2px 4px rgba(0,0,0,0.1); background-color: var(--primary-blue); }
.sentence-word.dragging { opacity: 0.5; transform: scale(0.9); }
.sentence-placeholder { display: inline-flex; align-items: center; justify-content: center; min-width: 80px; min-height: 36px; border: 2px dashed var(--placeholder-color); border-radius: var(--border-radius); margin: 3px; vertical-align: middle; background-color: color-mix(in srgb, var(--bg-color) 95%, white); cursor: pointer; transition: border-color var(--transition-speed), background-color var(--transition-speed); padding: 2px 4px; }
.sentence-placeholder:hover { border-color: var(--accent-color); background-color: color-mix(in srgb, var(--bg-color) 90%, white); }
.sentence-placeholder .sentence-word { cursor: grab; background-color: var(--accent-color); color: var(--bg-color); margin: 0; }
.sentence-placeholder.drag-over { border-style: solid; border-color: var(--accent-color); background-color: color-mix(in srgb, var(--bg-color) 85%, white); }
#sentence-feedback { margin-top: var(--spacing-unit); font-weight: 500; min-height: 1.6em; }
#sentence-distractors-input { width: 60px; }

#context-cloze-paragraph { margin-bottom: calc(var(--spacing-unit) * 1.6); line-height: 1.9; background-color: var(--bg-color); padding: calc(var(--spacing-unit) * 1.1); border-radius: var(--border-radius); border: 1px solid var(--border-color); }
.cloze-blank-container { display: inline-block; vertical-align: baseline; margin: 0 2px; }
.cloze-input { display: inline-block; width: auto; min-width: 80px; background: transparent; border: none; border-bottom: 2px solid var(--primary-blue); color: var(--primary-blue); text-align: center; font-size: 1em; padding: 2px 4px; margin: 0; transition: border-color var(--transition-speed), color var(--transition-speed), width 0.2s ease; }
.cloze-input:focus { outline: none; border-bottom-color: var(--accent-color); }
.cloze-input.correct { border-bottom-color: var(--success-color); color: var(--success-color); font-weight: 600; background-color: rgba(var(--success-rgb), 0.1); }
.cloze-input.incorrect { border-bottom-color: var(--error-color); color: var(--error-color); font-weight: 600; background-color: rgba(var(--error-rgb), 0.1); }
.hidden-sizer { position: absolute; visibility: hidden; height: auto; width: auto; white-space: nowrap; font: inherit; padding: 2px 4px; border-bottom-width: 2px; }
#context-cloze-feedback { margin-top: var(--spacing-unit); font-weight: 500; min-height: 1.6em; }

#pronunciation-source-word { font-size: 0.95rem; }
#pronunciation-text { font-size: 1.7rem; margin-bottom: calc(var(--spacing-unit) * 0.8); padding: calc(var(--spacing-unit) * 1.3); background-color: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--border-radius); text-align: center; font-weight: 500; }
.pronunciation-nav { display: flex; justify-content: center; align-items: center; gap: 0.8rem; margin-bottom: var(--spacing-unit); }
.pronunciation-image { display: block; max-width: 150px; max-height: 150px; margin: var(--spacing-unit) auto; border-radius: var(--border-radius); background-color: var(--card-bg); border: 1px solid var(--border-color); object-fit: cover; }
#pronunciation-feedback { margin-top: calc(var(--spacing-unit) * 0.8); font-weight: 500; text-align: center; min-height: 1.6em; }
#recording-status { color: var(--accent-color); margin-left: 9px; font-style: italic;}
#transcript-output { margin-top: calc(var(--spacing-unit) * 0.9); text-align: center; color: var(--text-secondary); font-style: italic; min-height: 1.3em; }

#chatbot-tutor { display: flex; flex-direction: column; height: 500px; }
#chatbot-history { flex-grow: 1; overflow-y: auto; border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: var(--spacing-unit); margin-bottom: var(--spacing-unit); background-color: var(--bg-color); }
.chat-message { margin-bottom: var(--spacing-unit); padding: 0.7rem 1rem; border-radius: var(--border-radius); max-width: 80%; line-height: 1.5; word-wrap: break-word; }
.chat-message.user { background-color: var(--primary-blue); color: #fff; margin-left: auto; border-bottom-right-radius: 0; }
.chat-message.ai { background-color: var(--card-bg); border: 1px solid var(--border-color); margin-right: auto; border-bottom-left-radius: 0; }
#chatbot-input-area { display: flex; gap: var(--spacing-unit); }
#chatbot-input { flex-grow: 1; margin-bottom: 0; }
#chatbot-clear-btn { flex-shrink: 0; background-color: var(--text-secondary); border-color: var(--text-secondary); color: var(--card-bg); padding-left: 0.8rem; padding-right: 0.8rem; }
#chatbot-clear-btn:hover { background-color: var(--error-color); border-color: var(--error-color); color: #fff; }
#chatbot-send-btn { flex-shrink: 0; }
.chat-message .loading-dots span { display: inline-block; width: 8px; height: 8px; background-color: currentColor; border-radius: 50%; margin: 0 2px; animation: bounce 1.4s infinite ease-in-out both; }
.chat-message .loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.chat-message .loading-dots span:nth-child(2) { animation-delay: -0.16s; }
@keyframes bounce { 0%, 80%, 100% { transform: scale(0); } 40% { transform: scale(1.0); } }

#dialogue-mode { }
#dialogue-area { min-height: 150px; background-color: var(--bg-color); border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: var(--spacing-unit); margin-bottom: var(--spacing-unit); line-height: 1.8; white-space: pre-wrap; overflow-y: auto; max-height: 300px;}
#dialogue-input-area { display: flex; align-items: center; gap: var(--spacing-unit); margin-top: var(--spacing-unit); }
#dialogue-input-area.hidden { display: none; }
#dialogue-input { flex-grow: 1; margin-bottom: 0; }
#dialogue-submit-btn {}
#dialogue-feedback { min-height: 1.6em; margin-top: 0.8rem; }

.sidebar-panel ul { list-style: none; padding: 0; display: flex; flex-direction: column; gap: calc(var(--spacing-unit) * 0.9);}
.sidebar-panel li { font-size: 0.95rem; display: flex; align-items: center; gap: 0.6rem;}
.sidebar-panel li i { width: 1.3em; text-align: center; color: var(--text-secondary); }
.sidebar-panel strong { color: var(--text-color); font-weight: 600; flex-shrink: 0; }
.sidebar-panel span:not(.badge) { color: var(--text-secondary); font-weight: 500; }

.progress-bar-container { background-color: var(--bg-color); border-radius: 10px; overflow: hidden; height: 14px; border: 1px solid var(--border-color); margin-top: 6px; }
.progress-bar { background: var(--progress-bar-bg); height: 100%; width: 0; border-radius: 10px; transition: width 0.8s cubic-bezier(0.25, 0.1, 0.25, 1); text-align: right; padding-right: 6px; color: white; font-size: 0.75rem; line-height: 14px; font-weight: 600; }
#badges-container { margin-top: calc(var(--spacing-unit) * 0.9); display: flex; gap: calc(var(--spacing-unit) * 0.6); flex-wrap: wrap; }
.badge { background-color: var(--accent-color); color: var(--bg-color); padding: calc(var(--spacing-unit) * 0.3) calc(var(--spacing-unit) * 0.7); border-radius: 12px; font-size: 0.8rem; font-weight: 600; display: inline-flex; align-items: center; gap: calc(var(--spacing-unit) * 0.4); transition: transform var(--transition-speed); }
.badge:hover { transform: scale(1.05); }
#badges-container.empty { color: var(--text-secondary); font-style: italic; display: flex; align-items: center; gap: 0.5rem; justify-content: center; }

#learning-goals > div { display: flex; align-items: center; gap: calc(var(--spacing-unit) * 0.8); }
#learning-goals label { margin-bottom: 0; flex-shrink: 0; }
#learning-goals input[type="number"] { width: 65px; margin-bottom: 0; font-size: 0.95rem; text-align: center; }
#learning-goals button { margin-left: auto; }
#goal-feedback { margin-top: 0.5rem; min-height: 1.2em; }

#history-filter-input, #previous-sets-filter-input { width: 100%; padding: 0.5rem 0.7rem; margin-bottom: 0.7rem; background-color: var(--bg-color); border: 1px solid var(--border-color); color: var(--text-color); border-radius: var(--border-radius); font-size: 0.9rem; }
#history-list, #previous-sets-list { list-style: none; padding: 0; max-height: 300px; overflow-y: auto; display: flex; flex-direction: column; gap: calc(var(--spacing-unit) * 0.7); }
#history-list li, #previous-sets-list li { background-color: var(--bg-color); border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: calc(var(--spacing-unit) * 0.7) calc(var(--spacing-unit) * 0.9); cursor: default; transition: background-color var(--transition-speed), border-color var(--transition-speed), opacity 0.3s, max-height 0.3s; display: flex; justify-content: space-between; align-items: center; gap: calc(var(--spacing-unit) * 0.9); }
#history-list li:hover, #previous-sets-list li:hover { background-color: var(--card-bg); border-color: var(--secondary-blue); }
.history-item-text { flex-grow: 1; font-size: 0.9rem;}
#history-list small, #previous-sets-list small { display: block; color: var(--text-secondary); margin-top: 3px; font-size: 0.8em; }
#history-list li.hidden, #previous-sets-list li.hidden { max-height: 0; opacity: 0; padding-top: 0; padding-bottom: 0; margin-top: -1px; border: none; overflow: hidden; }
#history-list .empty-state, #previous-sets-list .empty-state { color: var(--text-secondary); font-style: italic; display: flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 1rem 0; background-color: transparent; border: none; }

#history-controls { display: flex; flex-direction: column; gap: 0.7rem; align-items: stretch; margin-top: var(--spacing-unit); }
#history-controls .btn { width: 100%; text-align: center; justify-content: center; }
#history-controls #clear-history-btn:hover:not(:disabled) { border-color: var(--error-color); color: var(--error-color); background-color: rgba(var(--error-rgb), 0.1); }
#history-controls #load-pin-btn:hover:not(:disabled) { border-color: var(--success-color); color: var(--success-color); background-color: rgba(var(--success-rgb), 0.1); }

#previous-sets-controls { display: flex; flex-direction:column; gap: 0.5rem; align-items: stretch; margin-top: var(--spacing-unit); }
.previous-sets-actions { display: flex; flex-wrap: wrap; gap: calc(var(--spacing-unit) * 0.7); justify-content: space-between; }
.previous-sets-actions .btn { flex-grow: 1; min-width: 90px; text-align: center; }

#pin-input-container-history, #pin-input-container-sets { margin-top: 0.5rem; }
.pin-input-wrapper { position: relative; width: 100px; margin: 0 auto; }
#pin-input-history, #pin-input-sets { width: 100px; text-align: center; font-size: 1.2rem; letter-spacing: 0.5em; margin-bottom: 0; padding: 0.4rem; padding-left: calc(0.4rem + 0.25em); background-color: var(--bg-color); border: 1px solid var(--border-color); color: var(--text-color); border-radius: var(--border-radius); box-sizing: border-box; }
#custom-content-area { margin-top: var(--spacing-unit); border-top: 1px solid var(--border-color); padding-top: var(--spacing-unit); }
#custom-content-input { min-height: 110px; font-size: 0.9rem; }
#share-content-area { margin-top: var(--spacing-unit); }
#share-pin-output { width: 100%; font-family: monospace; font-size: 1.5rem; font-weight: bold; text-align: center; background-color: var(--bg-color); color: var(--accent-color); padding: 0.8rem; border-radius: var(--border-radius); border: 1px solid var(--border-color); resize: none; letter-spacing: 0.2em;}
#share-pin-output.hidden { display: none; }
#history-share-content-area { margin-top: var(--spacing-unit); }
#history-share-pin-output { width: 100%; font-family: monospace; font-size: 1.5rem; font-weight: bold; text-align: center; background-color: var(--bg-color); color: var(--accent-color); padding: 0.8rem; border-radius: var(--border-radius); border: 1px solid var(--border-color); resize: none; letter-spacing: 0.2em;}
#history-share-pin-output.hidden { display: none; }

#advanced-filters { display: flex; flex-wrap: wrap; gap: var(--spacing-unit); margin-bottom: var(--spacing-unit); }
#advanced-filters select { width: auto; min-width: 120px; margin-bottom: 0; }
#advanced-filters input { flex-grow: 1; margin-bottom: 0; }
#content-filter-input { margin-bottom: 0; }
#content-options label { margin-bottom: 0.3rem;}
#content-options select { margin-bottom: 0.7rem;}

#themed-packs-container { margin-top: var(--spacing-unit); padding-top: calc(var(--spacing-unit) * 0.8); border-top: 1px solid var(--border-color); }
.theme-packs-label { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0.5rem; display: block; }
.theme-packs-scroller-container { display: flex; align-items: center; }
#theme-packs-scroller { display: flex; align-items: center; gap: 0.5rem; overflow-x: auto; padding-bottom: 0.5rem; white-space: nowrap; scrollbar-width: thin; scrollbar-color: var(--border-color) var(--bg-color); -webkit-overflow-scrolling: touch; flex-grow: 1; }
#theme-packs-scroller::-webkit-scrollbar { height: 6px; }
#theme-packs-scroller::-webkit-scrollbar-track { background: var(--bg-color); }
#theme-packs-scroller::-webkit-scrollbar-thumb { background-color: var(--border-color); border-radius: 3px; border: 1px solid var(--bg-color); }
.theme-pack-btn { padding: 0.3rem 0.8rem; font-size: 0.85rem; background-color: var(--card-bg); border: 1px solid var(--border-color); color: var(--text-secondary); border-radius: 15px; cursor: pointer; transition: all var(--transition-speed); flex-shrink: 0; }
.theme-pack-btn:hover { background-color: var(--primary-blue); color: #fff; border-color: var(--primary-blue); transform: translateY(-1px); }
.theme-scroll-btn { background: none; border: none; color: var(--text-secondary); font-size: 1.2rem; cursor: pointer; padding: 0 0.3rem; flex-shrink: 0; }

.hidden { display: none !important; }
.text-success { color: var(--success-color); }
.text-error { color: var(--error-color); }
.text-accent { color: var(--accent-color); }
.text-secondary { color: var(--text-secondary); }
.text-center { text-align: center; }
.mt-1 { margin-top: var(--spacing-unit); } .mb-1 { margin-bottom: var(--spacing-unit); }
.mt-2 { margin-top: calc(var(--spacing-unit) * 1.5); } .mb-2 { margin-bottom: calc(var(--spacing-unit) * 1.5); }
.ml-1 { margin-left: var(--spacing-unit); }
a { color: var(--secondary-blue); text-decoration: none; transition: color var(--transition-speed);}
a:hover { color: var(--primary-blue); }
small { font-size: 0.85rem; color: var(--text-secondary); display: block; margin-top: calc(var(--spacing-unit) * 0.4); margin-bottom: calc(var(--spacing-unit) * 0.9); }
.tooltip { position: relative; display: inline-block; }
.tooltip .tooltiptext { visibility: hidden; width: 160px; background-color: color-mix(in srgb, var(--bg-color) 80%, black); color: var(--text-color); text-align: center; border-radius: var(--border-radius); padding: 5px 8px; position: absolute; z-index: 1; bottom: 125%; left: 50%; margin-left: -80px; opacity: 0; transition: opacity var(--transition-speed); font-size: 0.8rem; box-shadow: 0 1px 3px rgba(0,0,0,0.2); }
.tooltip:hover .tooltiptext { visibility: visible; opacity: 1; }

#loading-indicator { margin-left: 10px; }
#loading-indicator i { animation: spin 1.2s linear infinite; display: inline-block; }
#generation-error { font-weight: 500; }

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes incorrectFlash { 0%, 100% { background-color: var(--card-bg); border-color: var(--border-color); } 30%, 70% { background-color: var(--error-color); border-color: var(--error-color); transform: scale(1.02); } }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-color); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--placeholder-color); }

.mobile-nav-toggle { display: none; background: none; border: none; color: var(--text-secondary); font-size: 1.5rem; cursor: pointer; padding: 0.3rem; z-index: 11; }
#left-nav-toggle { position: absolute; top: 50%; transform: translateY(-50%); left: calc(var(--spacing-unit) * 1.5); }
#right-nav-toggle { position: absolute; top: 50%; transform: translateY(-50%); right: calc(var(--spacing-unit) * 1.5); }

.language-input-container { flex: 1; position: relative; }
.language-suggestions { display: none; position: absolute; top: 100%; left: 0; width: 100%; max-height: 100px; overflow-y: auto; background-color: var(--card-bg); border: 1px solid var(--border-color); border-top: none; box-shadow: 0 4px 6px rgba(0,0,0,0.1); z-index: 1000; border-radius: 0 0 var(--border-radius) var(--border-radius); margin-top: -1px; transform-origin: top; transform: scaleY(0); transition: transform 0.2s ease-out, opacity 0.2s ease-out; opacity: 0; }
.language-suggestions.visible { display: block; transform: scaleY(1); opacity: 1; }
.language-suggestions button { display: block; width: 100%; padding: 0.6em 0.8em; text-align: left; border: none; background-color: transparent; color: var(--text-color); cursor: pointer; font-size: 0.9em; border-bottom: 1px solid var(--border-color); }
.language-suggestions button:last-child { border-bottom: none; }
.language-suggestions button:hover, .language-suggestions button:focus { background-color: var(--primary-blue); color: #fff; outline: none; }

.api-key-container { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 0.5rem; }
#api-key-input { margin-bottom: 0; }
.api-key-remember { margin-bottom: 0; white-space: nowrap; }

.content-actions { display: flex; gap: 0.5rem; }

.hangman-container { display: flex; flex-direction: column; align-items: center; gap: 1rem; }
#hangman-canvas { border: 1px solid var(--border-color); background-color: var(--bg-color); max-width: 100%; height: auto; }
.hangman-word { font-size: 2rem; letter-spacing: 0.25rem; font-family: monospace; margin: 1rem 0; min-height: 2.5rem; color: var(--primary-blue); }
.hangman-hint { font-style: italic; margin-bottom: 1rem; color: var(--text-secondary); }
.hangman-letters { display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; margin-top: 1rem; max-width: 350px; }
.letter-btn { width: 2.5rem; height: 2.5rem; border-radius: 4px; background-color: var(--card-bg); border: 1px solid var(--border-color); font-size: 1rem; cursor: pointer; display: flex; align-items: center; justify-content: center; text-transform: uppercase; transition: all 0.2s; color: var(--text-color); user-select: none; }
.letter-btn:hover:not(:disabled) { background-color: var(--secondary-blue); color: var(--bg-color); border-color: var(--secondary-blue); }
.letter-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.letter-btn.correct { background-color: var(--success-color); color: white; border-color: var(--success-color); }
.letter-btn.incorrect { background-color: var(--error-color); color: white; border-color: var(--error-color); text-decoration: line-through; }
#hangman-result { min-height: 1.2em; font-weight: bold; }

.trivia-question { font-size: 1.2rem; padding: 1rem; background-color: var(--card-bg); border-radius: var(--border-radius); margin-bottom: 1rem; border: 1px solid var(--border-color); }
.trivia-options { display: flex; flex-direction: column; gap: 0.5rem; }
.trivia-option { padding: 0.75rem; text-align: left; transition: all 0.2s; width: 100%; margin-bottom: 0.5rem; }
.trivia-option:hover:not(:disabled) { background-color: var(--secondary-blue); color: var(--bg-color); }
.trivia-option:disabled { opacity: 0.7; cursor: default; }
.trivia-option.correct-answer { background-color: var(--success-color) !important; color: white !important; border-color: var(--success-color) !important; }
.trivia-option.wrong-answer { background-color: var(--error-color) !important; color: white !important; border-color: var(--error-color) !important; opacity: 0.7; }
#trivia-score { font-size: 1.1rem; font-weight: bold; }
#trivia-feedback { min-height: 1.2em; font-weight: bold; }

.btn-auto-skip { position: relative; overflow: hidden; }
.btn-auto-skip::before { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%; background: linear-gradient(90deg, transparent 0%, rgba(var(--primary-blue-rgb), 0.3) 30%, rgba(var(--primary-blue-rgb), 0.3) 70%, transparent 100% ); animation: wave-animation 4s linear forwards; pointer-events: none; z-index: 1; opacity: 0.8; }
@keyframes wave-animation { 0% { left: -100%; } 100% { left: 100%; } }

@media (min-width: 1069px) {
    .main-content { margin-left: var(--sidebar-width); margin-right: var(--sidebar-width); width: calc(100% - 2 * var(--sidebar-width)); transition: margin-left var(--transition-speed) var(--transition-timing), margin-right var(--transition-speed) var(--transition-timing); }
    .main-content.left-collapsed { margin-left: 0; width: calc(100% - var(--sidebar-width)); }
    .main-content.right-collapsed { margin-right: 0; width: calc(100% - var(--sidebar-width)); }
    .main-content.both-collapsed { margin-left: 0; margin-right: 0; width: 100%; }
     .mobile-nav-toggle { display: none; }
     header h1.main-title { transform: none; }
}
@media (max-width: 1200px) and (min-width: 1069px) {
    .main-content.left-collapsed { margin-left: 0; width: calc(100% - var(--sidebar-width)); }
    .main-content.right-collapsed { margin-right: 0; width: calc(100% - var(--sidebar-width)); }
    .main-content.both-collapsed { margin-left: 0; margin-right: 0; width: 100%; }
}
@media (max-width: 1068px) {
    .desktop-sidebar-toggle { display: none; }
     header h1.main-title { margin-left: 0; text-align: center; justify-content: center; flex-grow: 1; transform: none; flex-shrink: 1; }
    .mobile-nav-toggle { display: block; }
    .main-container { flex-direction: column; position: relative; }
    .left-sidebar, .right-sidebar { position: fixed; top: 0; bottom: 0; width: 280px; max-width: 85%; background-color: var(--card-bg); z-index: 20; transform: translateX(-100%); transition: transform 0.3s ease-out; border: none; box-shadow: 2px 0 5px rgba(0,0,0,0.2); overflow-y: auto; padding: var(--spacing-unit); margin-top: 0; }
    .right-sidebar { transform: translateX(100%); left: auto; right: 0; box-shadow: -2px 0 5px rgba(0,0,0,0.2); }
    .left-sidebar.visible, .right-sidebar.visible { transform: translateX(0); }
    .main-content { order: 0; padding: var(--spacing-unit); gap: var(--spacing-unit); margin-left: 0 !important; margin-right: 0 !important; width: 100% !important; }
    #learning-modes-selector { justify-content: center; }
    #chatbot-tutor { height: calc(100vh - 250px); }
    #left-nav-toggle { display: block; position: absolute; left: var(--spacing-unit); }
    #right-nav-toggle { display: block; position: absolute; right: var(--spacing-unit); }
}
@media (max-width: 399.98px) {
    .main-title .title-text { display: none; }
    .main-title .title-text-short { display: inline; }
    header h1.main-title { font-size: 1.5rem; gap: 0.5rem; }
}

@media (max-width: 299.98px) {
    .main-title .title-text-short { display: none; }
    header h1.main-title { font-size: 1.5rem; gap: 0; }
}

@media (max-width: 450px) {
     header h1.main-title { font-size: 1.3rem; gap: 0.4rem; }
     .panel { padding: var(--spacing-unit); }
     .btn { padding: calc(var(--spacing-unit) * 0.6) calc(var(--spacing-unit) * 1); font-size: 0.9rem; }
     .flashcard-text { font-size: 1.4rem; }
}

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0; }

.confirm-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.6); display: flex; align-items: center; justify-content: center; z-index: 1001; opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0s linear 0.3s; }
.confirm-overlay.visible { opacity: 1; visibility: visible; transition: opacity 0.3s ease; }
.confirm-box { background-color: var(--card-bg); padding: calc(var(--spacing-unit) * 1.8); border-radius: var(--border-radius); box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3); max-width: 400px; width: 90%; text-align: center; transform: scale(0.9); transition: transform 0.3s ease; }
.confirm-overlay.visible .confirm-box { transform: scale(1); }
.confirm-message { margin-bottom: calc(var(--spacing-unit) * 1.5); font-size: 1.1rem; line-height: 1.6; color: var(--text-color); }
.confirm-buttons { display: flex; justify-content: center; gap: var(--spacing-unit); }
.confirm-buttons .btn { min-width: 80px; }

.modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; z-index: 1000; visibility: hidden; opacity: 0; transition: opacity 0.3s ease, visibility 0s linear 0.3s; }
.modal.visible { visibility: visible; opacity: 1; transition: opacity 0.3s ease; }
.modal-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.6); cursor: pointer; }
.modal-content { position: relative; background-color: var(--card-bg); padding: calc(var(--spacing-unit) * 1.8); border-radius: var(--border-radius); box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3); max-width: 500px; width: 90%; z-index: 1001; max-height: 90vh; overflow-y: auto; transform: scale(0.95); transition: transform 0.3s ease; }
.modal.visible .modal-content { transform: scale(1); }
.modal-title { color: var(--primary-blue); margin-bottom: calc(var(--spacing-unit) * 1.5); padding-bottom: var(--spacing-unit); font-size: 1.4rem; border-bottom: 1px solid var(--border-color); text-align: center; }
#pdf-settings-form { display: flex; flex-direction: column; gap: calc(var(--spacing-unit) * 1.2); }
.modal-fieldset { border: 1px solid var(--border-color); padding: var(--spacing-unit); border-radius: var(--border-radius); margin-bottom: var(--spacing-unit); }
.modal-fieldset legend { padding: 0 0.5rem; font-weight: 500; color: var(--text-secondary); margin-bottom: 0.8rem; display: block; width: auto; float: none; }
.radio-label { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.6rem; font-size: 0.95rem; cursor: pointer; }
.radio-label input[type="radio"] { opacity: 0; position: absolute; }
.radio-custom { display: inline-block; width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--border-color); background-color: var(--bg-color); position: relative; transition: border-color 0.2s; }
.radio-label input[type="radio"]:checked + .radio-custom { border-color: var(--primary-blue); }
.radio-custom::after { content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%) scale(0); width: 10px; height: 10px; border-radius: 50%; background-color: var(--primary-blue); transition: transform 0.2s; }
.radio-label input[type="radio"]:checked + .radio-custom::after { transform: translate(-50%, -50%) scale(1); }
.modal-field { display: flex; flex-direction: column; gap: 0.5rem; }
.modal-field label:not(.checkbox-label):not(.radio-label) { margin-bottom: 0.2rem; }
.modal-field select { width: 100%; }
.modal-actions { display: flex; justify-content: flex-end; gap: var(--spacing-unit); margin-top: calc(var(--spacing-unit) * 1.8); padding-top: var(--spacing-unit); border-top: 1px solid var(--border-color); }
#pdf-loading-indicator { display: inline-block; margin-top: 0.5rem; text-align: center; width: 100%; }
.hidden-input { position: absolute; opacity: 0; pointer-events: none; width: 0; height: 0; }
.modal-fieldset.design-text-links { border: 1px solid var(--border-color); padding: var(--spacing-unit); border-radius: var(--border-radius); margin-bottom: var(--spacing-unit); }
.design-text-links .link-pair { margin-bottom: calc(var(--spacing-unit) * 1.2); display: flex; align-items: center; gap: calc(var(--spacing-unit) * 1.5); }
.design-text-links .link-label { font-weight: 600; font-size: 0.9em; color: var(--text-secondary); margin-bottom: 0; min-width: 50px; text-align: right; }
.design-text-links .toggle-link, .design-text-links .tristate-link { display: inline-block; margin-right: 15px; font-size: 0.95em; cursor: pointer; transition: color 0.2s, opacity 0.2s; padding: 2px 4px; border-radius: 3px; border: 1px solid transparent; }
.design-text-links .toggle-link:focus-visible, .design-text-links .tristate-link:focus-visible { outline: none; border-color: var(--primary-blue); box-shadow: 0 0 0 2px rgba(var(--primary-blue-rgb), 0.3); }
.design-text-links .toggle-link.off { color: var(--error-color); text-decoration: line-through; opacity: 0.7; }
.design-text-links .toggle-link.on { color: var(--success-color); font-weight: 500; }
.design-text-links .toggle-link.on::before { content: '✓ '; font-weight: bold; }
.design-text-links .toggle-link.off::before { content: '✗ '; font-weight: bold; }
.design-text-links .tristate-link[data-state="image"] { color: var(--success-color); font-weight: 500; }
.design-text-links .tristate-link[data-state="example"] { color: var(--secondary-blue); font-weight: 500; }
.design-text-links .tristate-link[data-state="none"] { color: var(--error-color); text-decoration: line-through; opacity: 0.7;}
.design-text-links .tristate-link[data-state="image"]::before { content: '✓ '; font-weight: bold; }
.design-text-links .tristate-link[data-state="example"]::before { content: '• '; font-weight: bold; }
.design-text-links .tristate-link[data-state="none"]::before { content: '✗ '; font-weight: bold; }
.design-text-links .toggle-link.disabled, .design-text-links .tristate-link.disabled { opacity: 0.4; cursor: not-allowed; text-decoration: none; color: var(--text-secondary); }
.design-text-links .toggle-link.disabled::before, .design-text-links .tristate-link.disabled::before { opacity: 0.6; }

#pdf-preview-area { background-color: var(--bg-color); border: 1px solid var(--border-color); min-height: 150px; display: flex; overflow-x: auto; overflow-y: hidden; padding: var(--spacing-unit); gap: var(--spacing-unit); white-space: nowrap; }
.preview-page { flex-shrink: 0; width: 210px; height: 297px; border: 1px dashed var(--text-secondary); background-color: var(--card-bg); padding: 10px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); display: grid; gap: 5px; transform-origin: top left; }
.preview-card { border: 1px solid var(--border-color); background-color: var(--bg-color); display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 5px; font-size: 8px; text-align: center; overflow: hidden; position: relative; }
.preview-card.nice-style { border-radius: 2px; border: 0.6px solid #444; box-shadow: inset 0 0 2px rgba(0,0,0,0.2); }
.preview-card-text { margin-bottom: 3px; max-height: 40%; overflow: hidden; word-break: break-word; }
.preview-card-text.example { font-style: italic; color: var(--text-secondary); font-size: 7px; }
.preview-card-image-placeholder { width: 60%; height: 30%; background-color: var(--placeholder-color); border-radius: 2px; display: flex; align-items: center; justify-content: center; color: var(--bg-color); font-size: 10px; margin-top: 3px; }
.preview-card-image-placeholder.hidden { display: none;}
#pdf-preview-area .text-secondary, #pdf-preview-area .text-error { width: 100%; text-align: center; white-space: normal; align-self: center; }

[data-theme="cyber"] input:focus, [data-theme="cyber"] textarea:focus, [data-theme="cyber"] select:focus { box-shadow: 0 0 0 3px rgba(var(--primary-blue-rgb), 0.5), 0 0 8px var(--secondary-blue); border-color: var(--secondary-blue); }
[data-theme="cyber"] .btn:hover:not(:disabled) { text-shadow: 0 0 5px #fff; box-shadow: 0 0 10px rgba(var(--primary-blue-rgb), 0.7); }
[data-theme="cyber"] .panel { border: 1px solid var(--secondary-blue); box-shadow: inset 0 0 8px rgba(var(--secondary-blue-rgb), 0.3), 0 0 5px rgba(var(--primary-blue-rgb), 0.2); }
[data-theme="cyber"] h1, [data-theme="cyber"] h2, [data-theme="cyber"] h3 { text-shadow: 0 0 3px var(--secondary-blue); }
[data-theme="cyber"] .match-item.selected { box-shadow: 0 0 10px var(--accent-color), 0 0 15px var(--primary-blue); }

[data-theme="black"] input, [data-theme="black"] textarea, [data-theme="black"] select { border-radius: 6px; }
[data-theme="black"] .btn { border-radius: 6px; }
[data-theme="black"] .panel { border-radius: 8px; }
[data-theme="black"] .flashcard-face { border-radius: 8px; }


.popup-zone { position: fixed; left: 50%; transform: translateX(-50%); width: fit-content; max-width: 420px; display: flex; gap: 10px; z-index: 1000; pointer-events: none; }
#popup-zone-0 { top: 10%; flex-direction: column; }
#popup-zone-1-3 { bottom: 5%; flex-direction: column-reverse; }
#popup-zone-2-4 { top: 50%; transform: translate(-50%, -50%); flex-direction: column-reverse; }
.popup { border-radius: 8px; box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4); min-width: 250px; max-width: 400px; opacity: 0; transform: scale(0.9); transition: opacity 0.4s ease, transform 0.4s ease; font-size: 1rem; user-select: none; overflow: hidden; cursor: pointer; pointer-events: auto; flex-shrink: 0; background-color: var(--card-bg); color: var(--text-color); }
.popup.show { opacity: 1; transform: scale(1); }
.popup-main { position: relative; padding: 15px 40px 15px 20px; transition: padding-bottom 0.3s ease; }
.popup-message { display: block; }
.popup-close { position: absolute; top: 8px; right: 8px; background: none; border: none; color: inherit; font-size: 1.5rem; font-weight: bold; line-height: 1; cursor: pointer; opacity: 0.7; padding: 0 5px; z-index: 10; }
.popup-close:hover { opacity: 1; }
.popup-details { max-height: 0; opacity: 0; overflow: hidden; transition: max-height 0.4s ease-out, opacity 0.4s ease-out, padding 0.4s ease-out, margin-top 0.4s ease-out; padding: 0 20px; font-size: 0.9em; color: var(--text-secondary); border-top: 1px solid var(--border-color); margin-top: 0px; }
.popup.no-hover-text .popup-details { display: none; }
.popup.expanded.no-hover-text .popup-main { padding-bottom: 15px; }
.popup.expanded { user-select: auto; cursor: default; }
.popup.expanded:not(.no-hover-text) .popup-main { padding-bottom: 10px; }
.popup.expanded:not(.no-hover-text) .popup-details { max-height: 200px; opacity: 1; padding: 15px 20px; margin-top: 10px; }
.popup-style-1 { background-color: var(--error-color); color: #fff; border: 2px solid color-mix(in srgb, var(--error-color) 80%, black); }
.popup-style-1 .popup-close { color: #fff; }
.popup-style-1 .popup-details { color: rgba(255, 255, 255, 0.85); border-top-color: rgba(255, 255, 255, 0.2); }
.popup-style-3-3 { background: linear-gradient(135deg, var(--primary-blue), color-mix(in srgb, var(--primary-blue) 80%, black)); color: #fff; border-radius: 8px; box-shadow: 0 4px 10px rgba(var(--primary-blue-rgb), 0.5); }
.popup-style-3-3 .popup-close { color: #fff; }
.popup-style-3-3 .popup-details { color: rgba(255, 255, 255, 0.85); border-top-color: rgba(255, 255, 255, 0.2); }
.popup-style-4-2 { background-color: var(--bg-color); color: var(--text-secondary); border-top: 5px solid var(--accent-color); border-left: none; border-radius: 8px; }
.popup-style-4-2 .popup-close { color: var(--text-secondary); }
.popup-style-4-2 .popup-details { color: var(--text-secondary); border-top-color: var(--border-color); }
.popup-style-9-3 { background: linear-gradient(color-mix(in srgb, var(--bg-color) 80%, black), color-mix(in srgb, var(--bg-color) 70%, black)); color: var(--text-color); border: none; border-bottom: 4px solid var(--border-color); border-radius: 0 0 5px 5px; }
.popup-style-9-3 .popup-close { color: var(--text-color); }
.popup-style-9-3 .popup-details { color: var(--text-secondary); border-top-color: var(--border-color); }
.popup-style-awesome { background-color: var(--card-bg); color: var(--text-color); font-weight: bold; border: none; border-top: 6px solid var(--error-color); border-left: 6px solid var(--primary-blue); border-radius: 0 15px 0 15px; box-shadow: 3px 3px 10px rgba(0,0,0,0.25); }
.popup-style-awesome .popup-close { color: var(--text-color); top: 10px; right: 10px; opacity: 0.6; }
.popup-style-awesome .popup-close:hover { opacity: 1; }
.popup-style-awesome .popup-details { color: var(--text-secondary); border-top-color: var(--border-color); }

.onboarding-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.6); z-index: 1090; opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0s linear 0.3s; pointer-events: none; box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.6); clip-path: inset(0); }
.onboarding-overlay.active { opacity: 1; visibility: visible; transition: opacity 0.3s ease; pointer-events: auto; }
.onboarding-tooltip { position: fixed; background-color: var(--card-bg); color: var(--text-color); border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: 1.5rem 2rem; box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3); z-index: 1100; max-width: 450px; opacity: 0; visibility: hidden; transform: scale(0.9); transition: opacity 0.3s ease, transform 0.3s ease, visibility 0s linear 0.3s; pointer-events: auto; width: 90%; }
.onboarding-tooltip.behind-dropdown {
    z-index: 1075; 
}
.onboarding-tooltip.welcome-step { padding: 2rem 2.5rem; max-width: 500px; max-height: 75vh; overflow: auto;}
.onboarding-tooltip.active { opacity: 1; visibility: visible; transform: scale(1); transition: opacity 0.3s ease, transform 0.3s ease; }
.onboarding-tooltip h4 { margin: 0 0 0.75rem 0; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border-color); font-size: 1.25rem; color: var(--primary-blue); text-align: center; }
.onboarding-tooltip p { margin-bottom: 1.25rem; font-size: 1rem; line-height: 1.6; text-align: center; color: var(--text-secondary); }
.onboarding-controls { display: flex; justify-content: space-between; align-items: center; margin-top: 1.25rem; padding-top: 1rem; border-top: 1px solid var(--border-color); }
.onboarding-controls .step-info { font-size: 0.9rem; color: var(--text-secondary); }
.onboarding-tooltip .btn-skip-all { background-color: transparent; color: var(--text-secondary); border: none; padding: 0; text-decoration: underline; cursor: pointer; font-size: 0.9rem; }
.onboarding-tooltip .btn-skip-all:hover { color: var(--error-color); }
.onboarding-arrow { position: fixed; width: 0; height: 0; border-style: solid; z-index: 1101; opacity: 0; transition: opacity 0.3s ease; pointer-events: none; }
.onboarding-arrow.active { opacity: 1; }
.onboarding-arrow.up { border-width: 0 10px 15px 10px; border-color: transparent transparent var(--card-bg) transparent; }
.onboarding-arrow.down { border-width: 15px 10px 0 10px; border-color: var(--card-bg) transparent transparent transparent; }
.onboarding-arrow.left { border-width: 10px 15px 10px 0; border-color: transparent var(--card-bg) transparent transparent; }
.onboarding-arrow.right { border-width: 10px 0 10px 15px; border-color: transparent transparent transparent var(--card-bg); }

.onboarding-welcome-box { display: flex; flex-direction: column; align-items: center; }
.welcome-header-content { display: flex; align-items: flex-start; justify-content: space-between; gap: 1.5rem; width: 100%; margin-bottom: 2rem; flex-wrap: wrap; }
.welcome-text-block { flex: 1; min-width: 200px; text-align: left; }
.welcome-text-block h4 { margin: 0 0 0.5rem 0; padding-bottom: 0; border-bottom: none; font-size: 1.25rem; color: var(--primary-blue); text-align: left; }
.welcome-text-block p { margin-bottom: 0; font-size: 1rem; line-height: 1.6; color: var(--text-secondary); text-align: left; }
.welcome-lang-switcher { flex-shrink: 0; margin-top: 0; margin-bottom: 0; position: relative; }
.onboarding-welcome-box #welcome-lang-toggle { background-color: var(--card-bg); border: 1px solid var(--border-color); color: var(--text-color); padding: 0.5rem 1rem; border-radius: var(--border-radius); cursor: pointer; transition: background-color 0.2s, border-color 0.2s; font-size: 0.95rem; }
.onboarding-welcome-box #welcome-lang-toggle:hover { background-color: var(--bg-color); border-color: var(--primary-blue); }
.onboarding-welcome-box #welcome-lang-dropdown { display: none; position: absolute; right: 0; top: calc(100% + 5px); background-color: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--border-radius); box-shadow: 0 3px 6px rgba(0,0,0,0.2); z-index: 1110; min-width: 150px; max-height: 150px; overflow-y: auto; }
.onboarding-welcome-box #welcome-lang-dropdown.visible { display: block; }
.onboarding-welcome-box #welcome-lang-list button { display: block; width: 100%; padding: 0.6rem 1rem; background: none; border: none; color: var(--text-color); text-align: left; cursor: pointer; font-size: 0.9rem; }
.onboarding-welcome-box #welcome-lang-list button:hover { background-color: var(--primary-blue); color: #fff; }
.onboarding-welcome-box #welcome-lang-list button.active { font-weight: bold; background-color: rgba(var(--primary-blue-rgb), 0.2); }

.onboarding-welcome-box .welcome-options { display: flex; flex-direction: column; align-items: stretch; gap: 0.8rem; width: 100%; max-width: 350px; margin-left: auto; margin-right: auto; }
.onboarding-welcome-box .welcome-options .separator { font-size: 0.9rem; color: var(--text-secondary); margin: 0.75rem 0; position: relative; text-align: center; width: 100%; }
.onboarding-welcome-box .welcome-options .separator::before, .onboarding-welcome-box .welcome-options .separator::after { content: ''; position: absolute; top: 50%; width: 35%; height: 1px; background-color: var(--border-color); }
.onboarding-welcome-box .welcome-options .separator::before { left: 5%; }
.onboarding-welcome-box .welcome-options .separator::after { right: 5%; }
.onboarding-welcome-box .welcome-options .btn { padding: 0.8rem 1rem; font-size: 1rem; }
.onboarding-welcome-box .welcome-options .btn-outline { padding: 0.7rem 1rem; font-size: 0.95rem; }
.welcome-options .btn[disabled] { cursor: not-allowed; opacity: 0.6; }
.coming-soon-tag { font-size: 0.75em; opacity: 0.8; margin-left: 4px; }

#welcome-pin-input-container { display: flex; flex-direction: column; align-items: center; width: 100%; }
#welcome-pin-input-container .pin-input-wrapper { position: relative; width: 120px; margin: 0 auto; }
#welcome-pin-input { width: 100%; text-align: center; font-size: 1.5rem; letter-spacing: 0.5em; padding: 0.5rem; padding-left: calc(0.5rem + 0.25em); background-color: var(--bg-color); border: 1px solid var(--border-color); color: var(--text-color); border-radius: var(--border-radius); box-sizing: border-box; }
#welcome-pin-input:focus { outline: none; border-color: var(--primary-blue); box-shadow: 0 0 0 3px rgba(var(--primary-blue-rgb), 0.3); }
#welcome-pin-error { color: var(--error-color); font-size: 0.85rem; text-align: center; }

.onboarding-highlight { position: relative; z-index: 1095; }

@media (max-width: 550px) {
    .welcome-header-content { flex-direction: column; align-items: center; gap: 1rem; text-align: center; }
    .welcome-text-block { text-align: center; }
    .welcome-text-block h4, .welcome-text-block p { text-align: center; }
    .welcome-lang-switcher { margin-top: 0.5rem; }
    .onboarding-welcome-box #welcome-lang-dropdown { left: 50%; transform: translateX(-50%); right: auto; }
}

.cookie-consent-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 1050;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0s linear 0.3s;
    backdrop-filter: blur(3px) brightness(0.8);
    -webkit-backdrop-filter: blur(3px) brightness(0.8);
    pointer-events: none;
}

.cookie-consent-overlay.visible {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease;
    pointer-events: auto;
}

#cookie-consent-popup {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--card-bg);
    padding: 1.2rem 1.5rem;
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -4px 12px rgba(0,0,0,0.2);
    z-index: 1060;
    transform: translateY(100%);
    visibility: hidden;
    transition: transform 0.4s ease-out, visibility 0s linear 0.4s;
    pointer-events: auto;
}

#cookie-consent-popup.visible {
    transform: translateY(0);
    visibility: visible;
    transition: transform 0.4s ease-out;
}

.cookie-consent-content {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

#cookie-consent-message {
    flex-grow: 1;
    margin-bottom: 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-align: left;
}

.cookie-consent-buttons {
    display: flex;
    gap: 0.8rem;
    flex-shrink: 0;
    flex-wrap: wrap;
    justify-content: center;
}

.cookie-consent-buttons .btn {
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
}

@media (max-width: 768px) {
    .cookie-consent-content {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    #cookie-consent-message {
        text-align: center;
        margin-bottom: 1rem;
    }
    .cookie-consent-buttons {
        justify-content: center;
    }
}