@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-color: #08080f;
    --card-bg: rgba(18, 18, 28, 0.65);
    --card-border: rgba(255, 255, 255, 0.08);
    --primary-color: #ffffff;
    --accent-color: #6366f1; /* premium indigo */
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --sidebar-width: 240px;
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.7);
    --yt-button-hover: rgba(255, 255, 255, 0.08);
    --yt-input-bg: #11111b;
    --yt-card-hover-bg: rgba(255, 255, 255, 0.04);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.4;
    letter-spacing: -0.01em;
}

/* Card Component (YouTube styled) */
.glass-card {
    background: #1f1f1f;
    border: 1px solid var(--card-border);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: background-color 0.2s ease;
}

/* Auth Layout */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    background: var(--bg-color);
}

.auth-container {
    width: 100%;
    max-width: 420px;
    padding: 35px 30px;
    background: #1f1f1f;
    border-radius: 16px;
    border: 1px solid var(--card-border);
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Form Fields */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid #3f3f3f;
    background: var(--yt-input-bg);
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s ease;
}

.form-control:focus {
    border-color: #888888;
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
}

/* Radio buttons for user role selection */
.role-selector {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.role-option {
    flex: 1;
    position: relative;
}

.role-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.role-label {
    display: block;
    text-align: center;
    padding: 10px;
    border: 1px solid #3f3f3f;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    background: var(--yt-input-bg);
    color: var(--text-secondary);
}

.role-option input[type="radio"]:checked + .role-label {
    border-color: var(--text-primary);
    background: #272727;
    color: var(--text-primary);
}

select.form-control {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23aaaaaa' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
    padding-right: 40px;
}

/* Buttons */
.btn {
    display: inline-block;
    width: 100%;
    padding: 12px 20px;
    border: none;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: #f1f1f1;
    color: #0f0f0f;
}

.btn-primary:hover {
    background: #d9d9d9;
}

.btn-secondary {
    background: #272727;
    color: #f1f1f1;
    border: 1px solid #3f3f3f;
}

.btn-secondary:hover {
    background: #3f3f3f;
}

.btn-danger {
    background: var(--danger-color);
    color: #ffffff;
}

.btn-danger:hover {
    background: #e03f3f;
}

.auth-footer {
    text-align: center;
    margin-top: 25px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.auth-footer a {
    color: #3ea6ff;
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.alert-danger {
    background: rgba(255, 77, 77, 0.15);
    border: 1px solid rgba(255, 77, 77, 0.3);
    color: var(--danger-color);
}

.alert-success {
    background: rgba(46, 196, 182, 0.15);
    border: 1px solid rgba(46, 196, 182, 0.3);
    color: var(--success-color);
}

/* Dashboard Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Navigation */
.sidebar {
    width: var(--sidebar-width);
    position: fixed;
    top: 56px; /* Below topbar header */
    bottom: 0;
    left: 0;
    padding: 12px;
    background: var(--bg-color);
    border-right: none;
    display: flex;
    flex-direction: column;
    z-index: 10;
    overflow-y: auto;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-section svg {
    color: var(--accent-color);
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-links a {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 10px 14px;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 10px;
    font-weight: 400;
    font-size: 0.88rem;
    transition: background-color 0.15s ease;
}

.nav-links a:hover {
    background: var(--yt-button-hover);
}

.nav-links li.active a {
    background: var(--yt-button-hover);
    font-weight: 500;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 15px;
    border-top: 1px solid var(--card-border);
}

.sidebar-footer .user-profile {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #3f3f3f;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
    flex-shrink: 0;
}

.user-info {
    width: 100%;
}

.user-name {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.user-role-badge {
    display: inline-block;
    font-size: 0.68rem;
    background: #272727;
    color: var(--text-secondary);
    padding: 2px 6px;
    border-radius: 4px;
    margin-top: 4px;
    font-weight: 600;
    text-transform: uppercase;
}

.logout-btn {
    color: var(--danger-color);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    margin-top: 6px;
    display: inline-block;
}

.logout-btn:hover {
    text-decoration: underline;
}

/* Header/Topbar like YouTube */
.yt-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--bg-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
    z-index: 100;
    border-bottom: 1px solid transparent;
}

.yt-header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.yt-logo-text {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.05em;
    color: var(--text-primary);
}

.menu-toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.menu-toggle-btn:hover {
    background: var(--yt-button-hover);
}

.yt-header-center {
    flex-grow: 1;
    max-width: 600px;
    margin: 0 20px;
}

.yt-search-form {
    display: flex;
    align-items: center;
    width: 100%;
}

.yt-search-box {
    flex-grow: 1;
    position: relative;
}

.yt-search-box input {
    width: 100%;
    height: 40px;
    padding: 0 16px;
    border: 1px solid #303030;
    border-radius: 40px 0 0 40px;
    background: #121212;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
}

.yt-search-box input:focus {
    border-color: #1a73e8;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.3);
}

.yt-search-btn {
    height: 40px;
    width: 64px;
    background: #222222;
    border: 1px solid #303030;
    border-left: none;
    border-radius: 0 40px 40px 0;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.yt-search-btn:hover {
    background: #303030;
}

.yt-header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Main Content Area */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: 56px;
    flex: 1;
    padding: 24px;
    width: calc(100% - var(--sidebar-width));
}

.content-header {
    margin-bottom: 24px;
}

.content-header h2 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* YouTube Style Subject chips */
.subject-chips-container {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 12px;
    margin-bottom: 24px;
    scrollbar-width: none;
}

.subject-chips-container::-webkit-scrollbar {
    display: none;
}

.chip-btn {
    padding: 6px 12px;
    border-radius: 8px;
    background: #272727;
    border: none;
    color: var(--text-primary);
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: background-color 0.15s ease;
    text-decoration: none;
}

.chip-btn:hover {
    background: #3f3f3f;
}

.chip-btn.active {
    background: #f1f1f1;
    color: #0f0f0f;
}

/* YouTube Grid & Cards */
.note-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.note-card {
    border: none;
    border-radius: 0;
    background: transparent;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    text-decoration: none;
}

.note-card:hover .note-thumbnail-wrapper img,
.note-card:hover .note-file-preview {
    transform: scale(1.02);
}

.note-thumbnail-wrapper {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 */
    background: #1f1f1f;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--card-border);
}

.note-thumbnail-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.2s ease;
}

.note-file-preview {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: #1e1e1e;
    color: var(--text-primary);
    padding: 15px;
    text-align: center;
    transition: transform 0.2s ease;
}

.note-file-icon {
    font-size: 2.2rem;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.note-badge {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(15, 15, 15, 0.85);
    padding: 3px 6px;
    border-radius: 4px;
    font-size: 0.72rem;
    font-weight: 500;
    color: #ffffff;
    text-transform: uppercase;
}

.note-details-youtube {
    display: flex;
    gap: 12px;
    padding-top: 12px;
}

.note-creator-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #3f3f3f;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.note-text-group {
    flex-grow: 1;
    overflow: hidden;
}

.note-title {
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1.35;
    margin-bottom: 4px;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.note-author-name {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.note-metrics-youtube {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

/* SaaS metrics table styling */
.saas-table-wrapper {
    background: #1f1f1f;
    border: 1px solid var(--card-border);
    border-radius: 12px;
    overflow: hidden;
    margin-top: 20px;
}

.saas-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    color: var(--text-primary);
}

.saas-table th, .saas-table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--card-border);
}

.saas-table th {
    background: #272727;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
}

.saas-table tr:hover td {
    background: #2d2d2d;
}

.subject-badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.subject-badge.matematyka { background: rgba(0, 113, 227, 0.15); color: #2b93ff; }
.subject-badge.fizyka { background: rgba(142, 44, 226, 0.15); color: #b76eff; }
.subject-badge.biologia { background: rgba(52, 199, 89, 0.15); color: #4ee277; }
.subject-badge.default { background: #272727; color: var(--text-secondary); }

/* Play presentation Slideshow Player Watch Mode */
.watch-container {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 24px;
    max-width: 1750px;
    margin: 0 auto;
}

@media (max-width: 1200px) {
    .watch-container {
        grid-template-columns: 1fr;
    }
}

.watch-player-section {
    width: 100%;
}

.slides-player-wrapper {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    background: #000;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 16px;
}

.slide-content-frame {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.slide-content-frame img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.slide-content-frame iframe {
    width: 100%;
    height: 100%;
    border: none;
    background: #fff;
}

/* Slides Controls Overlay */
.slides-controls-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    z-index: 5;
    opacity: 0.9;
    transition: opacity 0.2s ease;
}

.slides-controls-left, .slides-controls-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.slides-player-wrapper:hover .slides-controls-overlay {
    opacity: 1;
}

.slides-btn {
    background: transparent;
    border: none;
    color: #ffffff;
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    border-radius: 50%;
}

.slides-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.slide-counter-badge {
    color: #ffffff;
    font-size: 0.88rem;
    font-weight: 500;
    background: rgba(0, 0, 0, 0.6);
    padding: 4px 10px;
    border-radius: 12px;
}

/* Lesson Details in Watch View */
.watch-meta-info {
    margin-top: 12px;
    margin-bottom: 24px;
}

.watch-title {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.watch-meta-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.watch-channel-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.watch-channel-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #3f3f3f;
    color: var(--text-primary);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.watch-channel-name {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.watch-channel-sub {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.watch-actions {
    display: flex;
    gap: 8px;
}

.watch-action-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #272727;
    border: none;
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 18px;
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 500;
    transition: background-color 0.15s ease;
}

.watch-action-btn:hover {
    background: #3f3f3f;
}

.watch-action-btn.active {
    background: #f1f1f1;
    color: #0f0f0f;
}

/* Collapsible YouTube Description Box */
.watch-description-box {
    background: #272727;
    border-radius: 12px;
    padding: 12px;
    margin-top: 16px;
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.watch-description-box:hover {
    background: #323232;
}

.watch-description-meta {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.watch-description-text {
    font-size: 0.88rem;
    line-height: 1.5;
    color: #f1f1f1;
    white-space: pre-wrap;
    word-break: break-word;
}

/* Comments section YouTube styling */
.comments-section {
    margin-top: 24px;
}

.comments-count-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.comment-input-area {
    display: flex;
    gap: 16px;
    margin-bottom: 30px;
}

.comment-field-container {
    flex-grow: 1;
}

.comment-field {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid #3f3f3f;
    color: var(--text-primary);
    font-size: 0.88rem;
    padding: 8px 0;
    outline: none;
    transition: border-color 0.2s ease;
}

.comment-field:focus {
    border-bottom-color: #ffffff;
}

.comment-form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 8px;
    display: none;
}

.comment-form-actions.active {
    display: flex;
}

/* Comments listing */
.comments-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.comment-node {
    display: flex;
    gap: 16px;
}

.comment-content-wrapper {
    flex-grow: 1;
}

.comment-header-row {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 4px;
}

.comment-user {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-primary);
}

.comment-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.comment-msg {
    font-size: 0.88rem;
    line-height: 1.4;
    color: var(--text-primary);
}

/* Right sidebar recommendation column */
.watch-recommendations {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.recommendation-card {
    display: flex;
    gap: 8px;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.recommendation-card:hover .rec-title {
    color: #3ea6ff;
}

.recommendation-thumbnail {
    position: relative;
    width: 168px;
    height: 94px;
    flex-shrink: 0;
    background: #1f1f1f;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--card-border);
}

.recommendation-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.recommendation-thumbnail-preview {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: #1f1f1f;
    color: var(--text-secondary);
    text-align: center;
    padding: 5px;
}

.recommendation-info {
    flex-grow: 1;
    overflow: hidden;
}

.rec-title {
    font-size: 0.88rem;
    font-weight: 500;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.rec-author {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.rec-views {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Drop Area for presentation creator */
.upload-area {
    border: 2px dashed #3f3f3f;
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    background: var(--yt-input-bg);
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.upload-area:hover, .upload-area.dragover {
    border-color: #f1f1f1;
    background: #1e1e1e;
}

.progress-container {
    margin-top: 20px;
    display: none;
}

.progress-bar-wrapper {
    width: 100%;
    height: 8px;
    background: #272727;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: var(--accent-color);
    transition: width 0.2s ease;
}

.progress-text {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-top: 6px;
    text-align: right;
}

/* Tab selector */
.tab-headers {
    display: flex;
    gap: 16px;
    border-bottom: 1px solid var(--card-border);
    margin-bottom: 24px;
}

.tab-header-btn {
    padding: 12px 8px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
}

.tab-header-btn.active {
    color: var(--text-primary);
    border-bottom-color: #ffffff;
}

/* Responsive adjustment */
@media (max-width: 768px) {
    .sidebar {
        display: none; /* YouTube hides sidebar on mobile, or uses drawer */
    }
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 16px;
    }
    .yt-header-center {
        display: none; /* hide search bar on small screen */
    }
}

/* Subscriptions, Likes & Autocomplete suggestions */
.yt-sub-btn {
    background: #ff0000;
    color: #ffffff;
    border: none;
    border-radius: 18px;
    padding: 8px 16px;
    font-weight: 700;
    font-size: 0.88rem;
    cursor: pointer;
    margin-left: 12px;
    transition: background-color 0.15s ease;
}

.yt-sub-btn:hover {
    background: #cc0000;
}

.yt-sub-btn.subscribed {
    background: #272727;
    color: #aaaaaa;
}

.yt-sub-btn.subscribed:hover {
    background: #3f3f3f;
    color: #ffffff;
}

.like-dislike-wrapper {
    display: flex;
    background: #272727;
    border-radius: 18px;
    overflow: hidden;
}

.like-btn, .dislike-btn {
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: 8px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.88rem;
    font-weight: 500;
    transition: background-color 0.15s ease;
}

.like-btn:hover, .dislike-btn:hover {
    background: #3f3f3f;
}

.like-btn.active, .dislike-btn.active {
    color: #3ea6ff;
}

.like-dislike-divider {
    width: 1px;
    background: #3f3f3f;
    align-self: stretch;
}

/* Search Suggestions dropdown */
.autocomplete-container {
    position: relative;
    width: 100%;
}

.autocomplete-suggestions {
    position: absolute;
    top: 105%;
    left: 0;
    right: 0;
    background: #212121;
    border: 1px solid #303030;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
    z-index: 1000;
    max-height: 300px;
    overflow-y: auto;
    display: none;
}

.autocomplete-suggestion {
    padding: 10px 16px;
    font-size: 0.9rem;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
}

.autocomplete-suggestion:hover {
    background: #303030;
}

.autocomplete-suggestion-icon {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
}

/* ── Auth pages (login / register / reset) ── */
.auth-page {
    background: var(--bg-color);
}

.auth-shell {
    min-height: 100vh;
    padding: 24px;
}

.auth-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    max-width: 980px;
    margin: 0 auto;
    align-items: center;
    min-height: calc(100vh - 48px);
}

.auth-layout-register {
    max-width: 1040px;
}

.auth-side {
    padding: 24px 12px;
}

.auth-side-compact h2 {
    font-size: 1.5rem;
}

.auth-side h2 {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.auth-side p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.55;
}

.auth-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 28px;
    color: var(--text-primary);
}

.auth-brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: rgba(255, 0, 0, 0.12);
    color: var(--accent-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.auth-benefits {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 24px;
}

.auth-benefit {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.auth-benefit span {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: rgba(46, 196, 182, 0.15);
    color: var(--success-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.auth-card {
    max-width: none;
}

.auth-meta-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.auth-link {
    color: #3ea6ff;
    text-decoration: none;
    font-weight: 500;
}

.auth-link:hover {
    text-decoration: underline;
}

.password-input-wrapper {
    position: relative;
}

.password-input-wrapper .form-control {
    padding-right: 72px;
}

.password-toggle {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    padding: 4px 6px;
}

.password-toggle:hover {
    color: var(--text-primary);
}

.password-strength {
    display: flex;
    gap: 6px;
    margin-top: 10px;
}

.password-strength span {
    flex: 1;
    height: 4px;
    border-radius: 2px;
    background: #3f3f3f;
    transition: background-color 0.2s ease;
}

.password-strength[data-score="1"] span:nth-child(1),
.password-strength[data-score="2"] span:nth-child(-n+2),
.password-strength[data-score="3"] span {
    background: var(--success-color);
}

.password-hint-wrapper {
    margin-top: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    background: #272727;
    border: 1px solid var(--card-border);
}

.password-hint-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.password-hint-item {
    font-size: 0.78rem;
    color: var(--text-secondary);
    padding-left: 14px;
    position: relative;
    margin-bottom: 3px;
}

.password-hint-item::before {
    content: "○";
    position: absolute;
    left: 0;
    font-size: 0.65rem;
}

.password-hint-item.valid {
    color: var(--success-color);
}

.password-hint-item.valid::before {
    content: "●";
}

.terms-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.terms-group input {
    margin-top: 3px;
}

.terms-group a {
    color: #3ea6ff;
}

.alert-info {
    background: rgba(62, 166, 255, 0.12);
    border: 1px solid rgba(62, 166, 255, 0.25);
    color: #3ea6ff;
}

.auth-role-selector .role-label small {
    display: block;
    font-size: 0.72rem;
    color: var(--text-secondary);
    margin-top: 4px;
    font-weight: 400;
}

.register-form .form-span {
    grid-column: 1 / -1;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Student dashboard extras ── */
.dashboard-hero-lite h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.dashboard-hero-lite p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.dashboard-quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 12px 0;
}

.quick-action {
    padding: 6px 14px;
    border-radius: 18px;
    background: #272727;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.82rem;
    font-weight: 500;
    border: 1px solid var(--card-border);
    transition: background-color 0.15s ease;
}

.quick-action:hover {
    background: #3f3f3f;
}

.student-summary-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 14px;
    margin-bottom: 20px;
}

.stats-card.mini {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    background: #1f1f1f;
    border: 1px solid var(--card-border);
    border-radius: 12px;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}

.stats-card.mini:hover {
    background: #272727;
}

.stats-card.mini.active-filter {
    border-color: #f1f1f1;
    background: #272727;
}

.stats-card-icon {
    font-size: 1.4rem;
}

.stats-card-info .stats-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.stats-card-info .stats-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.student-toolbar {
    background: #1f1f1f;
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 20px;
}

.search-form {
    display: flex;
    gap: 10px;
    margin-bottom: 14px;
}

.search-form .search-input {
    flex: 1;
}

.search-form .btn-secondary {
    width: auto;
    white-space: nowrap;
}

.result-count {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 10px;
}

.note-title-link,
.note-creator-link {
    color: inherit;
    text-decoration: none;
}

.note-title-link:hover,
.note-creator-link:hover {
    color: #3ea6ff;
}

.header-icon {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: var(--text-primary);
    text-decoration: none;
    transition: background-color 0.15s ease;
}

.header-icon:hover {
    background: var(--yt-button-hover);
}

.notification-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    border-radius: 8px;
    background: var(--accent-color);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-section-title {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin: 16px 0 8px;
    padding-left: 14px;
    letter-spacing: 0.04em;
}

.sidebar-chip {
    margin: 0 14px;
    padding: 6px 10px;
    border-radius: 8px;
    background: #272727;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: rgba(33, 33, 33, 0.95);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    padding: 12px 22px;
    border-radius: 12px;
    font-size: 0.88rem;
    font-weight: 500;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s ease, opacity 0.35s ease;
    box-shadow: var(--shadow-md);
}

.toast.is-visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.show-more-btn {
    color: #3ea6ff;
    font-weight: 600;
    font-size: 0.82rem;
    margin-top: 8px;
    cursor: pointer;
}

.watch-description-box:not(.expanded) .watch-description-text {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

@media (max-width: 900px) {
    .auth-layout {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .auth-side {
        display: none;
    }
}

@media (max-width: 768px) {
    .search-form {
        flex-direction: column;
    }

    .search-form .btn-secondary {
        width: 100%;
    }
}

/* ──────────────────────────────────────────────────────────────────────────
   PREMIUM STYLE & DESIGN SYSTEM ADDITIONS (YTI School Hub)
   ────────────────────────────────────────────────────────────────────────── */

/* Glassmorphism Components */
.glass-card, .saas-table-wrapper, .auth-container, .dashboard-hero, .dashboard-hero-lite, .student-toolbar {
    background: var(--card-bg) !important;
    backdrop-filter: blur(16px) saturate(120%);
    -webkit-backdrop-filter: blur(16px) saturate(120%);
    border: 1px solid var(--card-border) !important;
    box-shadow: var(--shadow-md) !important;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.15) !important;
    box-shadow: var(--shadow-lg) !important;
}

/* Styled Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: #08080f;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.12);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-gradient);
}

/* Onboarding Carousel inside login / register */
.auth-layout {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 30px;
    width: 100%;
    max-width: 1050px;
    min-height: 580px;
}

.auth-side {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(30, 30, 50, 0.6) 0%, rgba(10, 10, 20, 0.9) 100%);
    border-radius: 16px;
    border: 1px solid var(--card-border);
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.onboarding-carousel {
    position: relative;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 250px;
}

.onboarding-slide {
    display: none;
    animation: fadeInUp 0.4s ease-out;
}

.onboarding-slide.active {
    display: block;
}

.onboarding-slide h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.onboarding-slide p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.5;
}

.onboarding-dots {
    display: flex;
    gap: 6px;
    margin-top: 20px;
}

.onboarding-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s;
}

.onboarding-dot.active {
    background: var(--accent-color);
    transform: scale(1.2);
}

/* Study Planner (circular target indicator) */
.planner-widget {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 20px;
    border: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    gap: 20px;
}

.planner-progress-svg {
    position: relative;
    width: 80px;
    height: 80px;
}

.planner-circle-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.05);
    stroke-width: 8;
}

.planner-circle-fg {
    fill: none;
    stroke: var(--accent-color);
    stroke-width: 8;
    stroke-linecap: round;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
    transition: stroke-dashoffset 0.6s ease;
}

.planner-progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Personal Study Notepad */
.watch-container {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 24px;
    max-width: 1750px;
    margin: 0 auto;
}

.watch-with-notepad {
    grid-template-columns: 1fr 360px 380px !important;
}

.notepad-panel {
    display: flex;
    flex-direction: column;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 20px;
    height: fit-content;
    box-shadow: var(--shadow-md);
}

.notepad-textarea {
    width: 100%;
    height: 240px;
    background: #11111d;
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 12px;
    font-family: inherit;
    font-size: 0.9rem;
    resize: vertical;
    outline: none;
    margin-bottom: 12px;
}

.notepad-textarea:focus {
    border-color: var(--accent-color);
}

.notepad-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.notepad-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.notepad-status {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.notepad-actions {
    display: flex;
    gap: 8px;
}

/* Reading themes on player */
.slide-content-frame.theme-sepia {
    background-color: #f4ecd8 !important;
    color: #5c4033 !important;
}
.slide-content-frame.theme-light {
    background-color: #ffffff !important;
    color: #111111 !important;
}
.theme-selector-pill {
    display: flex;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 18px;
    padding: 2px;
    border: 1px solid var(--card-border);
}
.theme-option-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.2s;
}
.theme-option-btn.active {
    background: var(--text-primary);
    color: var(--bg-color);
}

/* Autoplay Slides panel */
.autoplay-panel {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 18px;
    padding: 4px 12px;
    font-size: 0.75rem;
    border: 1px solid var(--card-border);
}

/* Dynamic Charts SVG */
.chart-container-svg {
    width: 100%;
    height: 180px;
    margin-top: 15px;
}

.chart-bar-rect {
    fill: url(#chartGrad);
    rx: 4;
    transition: fill 0.2s, height 0.3s ease, y 0.3s ease;
    cursor: pointer;
}

.chart-bar-rect:hover {
    fill: #a855f7;
}

.chart-axis-line {
    stroke: rgba(255, 255, 255, 0.08);
    stroke-width: 1;
}

.chart-grid-line {
    stroke: rgba(255, 255, 255, 0.04);
    stroke-width: 1;
    stroke-dasharray: 4 4;
}

.chart-label-text {
    fill: var(--text-secondary);
    font-size: 9px;
    text-anchor: middle;
}

/* Tag Cloud Cloud UI */
.tag-cloud-container {
    margin-bottom: 20px;
    background: var(--card-bg);
    border-radius: 12px;
    padding: 16px;
    border: 1px solid var(--card-border);
}

.tag-cloud-title {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.tag-cloud-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-cloud-item {
    font-size: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    padding: 4px 10px;
    border-radius: 14px;
    color: var(--text-primary);
    text-decoration: none;
    border: 1px solid transparent;
    transition: all 0.2s;
}

.tag-cloud-item:hover {
    background: var(--accent-color);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

/* Study Streak & Badges */
.streak-badge-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.streak-card {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.15) 0%, rgba(245, 158, 11, 0.1) 100%);
    border: 1px solid rgba(239, 68, 68, 0.25);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.streak-card-icon {
    font-size: 2.2rem;
    animation: flamePulse 2s infinite alternate;
}

@keyframes flamePulse {
    0% { transform: scale(1); filter: drop-shadow(0 0 2px #ef4444); }
    100% { transform: scale(1.1); filter: drop-shadow(0 0 8px #f59e0b); }
}

.badges-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.badge-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--card-border);
    border-radius: 18px;
    font-size: 0.8rem;
    font-weight: 500;
}

.badge-item.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(168, 85, 247, 0.2) 100%);
    border-color: var(--accent-color);
}

.badge-item-icon {
    font-size: 1rem;
}

/* Promo Codes in Cart */
.promo-code-container {
    display: flex;
    gap: 10px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--card-border);
}

/* Estymator czytania */
.reading-time-badge {
    font-size: 0.72rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: auto;
    display: inline-block;
}

/* Responsive auth layout */
@media (max-width: 900px) {
    .auth-layout {
        grid-template-columns: 1fr;
        max-width: 450px;
    }
    .auth-side {
        display: none;
    }
}
@media (max-width: 1200px) {
    .watch-with-notepad {
        grid-template-columns: 1fr !important;
    }
}

/* Printing styles for analytics */
@media print {
    body {
        background: #ffffff !important;
        color: #000000 !important;
    }
    .sidebar, .yt-header, .btn, .dashboard-actions, .saas-dashboard-grid > div:first-child, .playlist-list {
        display: none !important;
    }
    .main-content {
        margin-left: 0 !important;
        margin-top: 0 !important;
        width: 100% !important;
        padding: 0 !important;
    }
    .glass-card, .saas-table-wrapper {
        background: transparent !important;
        border: none !important;
        box-shadow: none !important;
    }
    .saas-table th {
        color: #000000 !important;
        border-bottom: 2px solid #000000 !important;
    }
    .saas-table td {
        color: #000000 !important;
        border-bottom: 1px solid #cccccc !important;
    }
}