/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #272727;
    --bg-hover: #3a3a3a;
    --text-primary: #f1f1f1;
    --text-secondary: #aaaaaa;
    --accent-color: #ff0000;
    --accent-hover: #cc0000;
    --border-color: #3a3a3a;
    --header-bg: #0f0f0f;
    --sidebar-width: 240px;
    --sidebar-mini-width: 72px;
    --header-height: 56px;
    --chip-bg: #272727;
    --chip-active-bg: #f1f1f1;
    --chip-active-text: #0f0f0f;
    --subscribe-bg: #cc0000;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--bg-hover);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--header-bg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 1000;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 200px;
}

.menu-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 20px;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.menu-btn:hover {
    background: var(--bg-tertiary);
}

.logo {
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
}
.logo-icon {
    font-size: 28px;
    color: var(--accent-color);
}
.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.header-center {
    display: flex;
    align-items: center;
    flex: 1;
    max-width: 640px;
    margin: 0 auto;
    gap: 8px;
}

.search-box {
    display: flex;
    flex: 1;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    background: var(--bg-primary);
}
.search-box input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    padding: 0 16px;
    font-size: 16px;
}
.search-box input::placeholder {
    color: var(--text-secondary);
}
.search-btn {
    width: 64px;
    background: var(--bg-tertiary);
    border: none;
    border-left: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 16px;
    transition: background 0.2s;
}
.search-btn:hover {
    background: var(--bg-hover);
}

.voice-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 16px;
    transition: background 0.2s;
}
.voice-btn:hover {
    background: var(--bg-hover);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 200px;
    justify-content: flex-end;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 18px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.icon-btn:hover {
    background: var(--bg-tertiary);
}
.notification-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    background: var(--accent-color);
    color: white;
    font-size: 10px;
    padding: 1px 4px;
    border-radius: 8px;
    font-weight: 500;
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #7c4dff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    color: white;
}
.avatar.small {
    width: 28px;
    height: 28px;
    font-size: 12px;
}

/* ===== SIDEBAR ===== */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background: var(--bg-primary);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 999;
    padding: 12px 0;
    transition: transform 0.3s ease, width 0.3s ease;
}

.sidebar.collapsed {
    width: var(--sidebar-mini-width);
}
.sidebar.collapsed .sidebar-item span,
.sidebar.collapsed .sidebar-title,
.sidebar.collapsed .sidebar-footer,
.sidebar.collapsed .sidebar-divider {
    display: none;
}
.sidebar.collapsed .sidebar-item {
    flex-direction: column;
    padding: 8px 0;
    justify-content: center;
    font-size: 10px;
}
.sidebar.collapsed .sidebar-item i {
    margin: 0;
    font-size: 20px;
}

.sidebar-section {
    padding: 0 12px;
    margin-bottom: 12px;
}

.sidebar-title {
    font-size: 14px;
    font-weight: 500;
    padding: 8px 12px;
    color: var(--text-secondary);
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 8px 12px;
    border-radius: 10px;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 14px;
    color: var(--text-primary);
    white-space: nowrap;
}
.sidebar-item:hover {
    background: var(--bg-tertiary);
}
.sidebar-item.active {
    background: var(--bg-tertiary);
    font-weight: 500;
}
.sidebar-item i {
    font-size: 18px;
    width: 24px;
    text-align: center;
}

.sidebar-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    color: white;
    font-weight: 500;
}

.sidebar-divider {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 12px 16px;
}

.sidebar-footer {
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
    padding: 16px;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-top: var(--header-height);
    margin-left: var(--sidebar-width);
    padding: 16px 24px;
    padding-bottom: 80px;
    transition: margin-left 0.3s ease;
}

body.sidebar-collapsed .main-content {
    margin-left: var(--sidebar-mini-width);
}

/* ===== CATEGORY CHIPS ===== */
.category-chips {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 8px 0 16px;
    position: sticky;
    top: var(--header-height);
    background: var(--bg-primary);
    z-index: 100;
    -ms-overflow-style: none;
    scrollbar-width: none;
}
.category-chips::-webkit-scrollbar {
    display: none;
}

.chip {
    padding: 6px 16px;
    border-radius: 8px;
    background: var(--chip-bg);
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
    font-family: 'Roboto', sans-serif;
}
.chip:hover {
    background: var(--bg-hover);
}
.chip.active {
    background: var(--chip-active-bg);
    color: var(--chip-active-text);
    font-weight: 500;
}

/* ===== VIDEO GRID ===== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 16px;
    padding-top: 8px;
}

.video-card {
    cursor: pointer;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.2s;
}
.video-card:hover {
    transform: scale(1.02);
}

.thumbnail-wrapper {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    overflow: hidden;
    border-radius: 12px;
    background: var(--bg-tertiary);
}
.thumbnail-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}
.video-card:hover .thumbnail-wrapper img {
    transform: scale(1.05);
}
.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.8);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.video-info {
    display: flex;
    gap: 12px;
    padding: 12px 0;
}
.video-info .channel-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #7c4dff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: white;
    flex-shrink: 0;
    font-weight: 500;
}
.video-details {
    flex: 1;
    min-width: 0;
}
.video-details h3 {
    font-size: 14px;
    font-weight: 500;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 4px;
}
.video-details .channel-name-small {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 2px;
    display: flex;
    align-items: center;
    gap: 4px;
}
.video-details .channel-name-small .verified {
    font-size: 12px;
    color: var(--text-secondary);
}
.video-details .video-meta {
    font-size: 13px;
    color: var(--text-secondary);
}

.video-card .menu-dots {
    position: absolute;
    top: 8px;
    right: 8px;
    background: none;
    border: none;
    color: white;
    font-size: 18px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
    text-shadow: 0 0 4px rgba(0,0,0,0.5);
}
.video-card:hover .menu-dots {
    opacity: 1;
}

/* ===== SHORTS SHELF ===== */
.shorts-shelf {
    margin-bottom: 24px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}
.shorts-shelf-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}
.shorts-shelf-header h2 {
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.shorts-shelf-header h2 i {
    color: var(--accent-color);
}
.view-all {
    color: var(--text-secondary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    transition: color 0.2s;
}
.view-all:hover {
    color: var(--text-primary);
}

.shorts-shelf-container {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    padding-bottom: 8px;
    -ms-overflow-style: none;
    scrollbar-width: none;
}
.shorts-shelf-container::-webkit-scrollbar {
    display: none;
}

.short-card {
    min-width: 180px;
    max-width: 180px;
    cursor: pointer;
    flex-shrink: 0;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    transition: transform 0.2s;
}
.short-card:hover {
    transform: scale(1.05);
}

.short-card .short-thumbnail {
    width: 100%;
    height: 320px;
    object-fit: cover;
    border-radius: 12px;
    background: var(--bg-tertiary);
}
.short-card .short-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 40px 8px 8px;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    border-radius: 0 0 12px 12px;
}
.short-card .short-title {
    font-size: 13px;
    font-weight: 500;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.short-card .short-views {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ===== WATCH PAGE ===== */
.watch-container {
    margin-top: var(--header-height);
    display: flex;
    max-width: 1800px;
    margin-left: auto;
    margin-right: auto;
    padding: 24px;
    gap: 24px;
}

.watch-primary {
    flex: 1;
    min-width: 0;
    max-width: 1000px;
}

.video-player-wrapper {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    background: #000;
    border-radius: 12px;
    overflow: hidden;
}
.video-player-wrapper iframe,
.video-player-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-info-section {
    padding: 16px 0;
}

.video-title {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 12px;
}

.video-meta-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}
.video-views, .video-date {
    font-size: 14px;
    color: var(--text-secondary);
}

.video-actions {
    display: flex;
    gap: 8px;
    margin-left: auto;
    flex-wrap: wrap;
}
.action-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 20px;
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s;
    font-family: 'Roboto', sans-serif;
}
.action-btn:hover {
    background: var(--bg-hover);
}
.action-btn.active {
    color: #3ea6ff;
}

.channel-info-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}
.channel-info-left {
    display: flex;
    align-items: center;
    gap: 12px;
}
.channel-avatar-large {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: #7c4dff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 18px;
    color: white;
}
.channel-details .channel-name {
    font-size: 16px;
    font-weight: 500;
}
.channel-details .channel-subs {
    font-size: 13px;
    color: var(--text-secondary);
}

.subscribe-btn {
    padding: 10px 20px;
    border-radius: 20px;
    background: var(--subscribe-bg);
    color: white;
    border: none;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'Roboto', sans-serif;
}
.subscribe-btn:hover {
    background: #aa0000;
}
.subscribe-btn.subscribed {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.description-box {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 16px;
    margin-top: 16px;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.2s;
}
.description-box:hover {
    background: var(--bg-hover);
}
.show-more-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    margin-top: 8px;
    font-size: 14px;
    font-family: 'Roboto', sans-serif;
}

/* ===== COMMENTS ===== */
.comments-section {
    margin-top: 24px;
}
.comments-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}
.comments-header h3 {
    font-size: 16px;
    font-weight: 500;
}
.sort-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Roboto', sans-serif;
}

.add-comment {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}
.comment-input-wrapper {
    flex: 1;
}
.comment-input-wrapper input {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 0;
    font-size: 14px;
    outline: none;
    font-family: 'Roboto', sans-serif;
}
.comment-input-wrapper input:focus {
    border-bottom-color: var(--text-primary);
}

.comment-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 8px;
}
.cancel-btn {
    padding: 8px 16px;
    border-radius: 20px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 14px;
    font-family: 'Roboto', sans-serif;
}
.cancel-btn:hover {
    background: var(--bg-tertiary);
}
.submit-comment-btn {
    padding: 8px 16px;
    border-radius: 20px;
    background: #3ea6ff;
    border: none;
    color: #0f0f0f;
    font-weight: 500;
    cursor: pointer;
    font-size: 14px;
    font-family: 'Roboto', sans-serif;
}

.comment-item {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    padding: 8px 0;
}
.comment-item .comment-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    color: white;
    flex-shrink: 0;
    font-weight: 500;
}
.comment-body {
    flex: 1;
}
.comment-author {
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 2px;
}
.comment-author span {
    font-weight: 400;
    color: var(--text-secondary);
    margin-left: 8px;
    font-size: 12px;
}
.comment-text {
    font-size: 14px;
    line-height: 1.4;
    margin-bottom: 8px;
}
.comment-reactions {
    display: flex;
    align-items: center;
    gap: 16px;
}
.comment-reactions button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color 0.2s;
    font-family: 'Roboto', sans-serif;
}
.comment-reactions button:hover {
    color: var(--text-primary);
}

/* ===== RECOMMENDED SIDEBAR ===== */
.watch-secondary {
    width: 400px;
    flex-shrink: 0;
}

.recommended-header {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    overflow-x: auto;
    -ms-overflow-style: none;
    scrollbar-width: none;
}
.recommended-header::-webkit-scrollbar {
    display: none;
}
.rec-chip {
    padding: 6px 12px;
    border-radius: 8px;
    background: var(--chip-bg);
    border: none;
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
    font-family: 'Roboto', sans-serif;
}
.rec-chip.active {
    background: var(--chip-active-bg);
    color: var(--chip-active-text);
}

.recommended-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.rec-video-card {
    display: flex;
    gap: 8px;
    cursor: pointer;
    border-radius: 8px;
    padding: 4px;
    transition: background 0.2s;
}
.rec-video-card:hover {
    background: var(--bg-tertiary);
}
.rec-thumbnail {
    width: 168px;
    min-width: 168px;
    height: 94px;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    background: var(--bg-tertiary);
}
.rec-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.rec-thumbnail .video-duration {
    position: absolute;
    bottom: 4px;
    right: 4px;
    background: rgba(0,0,0,0.8);
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 11px;
}
.rec-video-info {
    flex: 1;
    min-width: 0;
}
.rec-video-info h4 {
    font-size: 13px;
    font-weight: 500;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 4px;
}
.rec-video-info .rec-channel {
    font-size: 12px;
    color: var(--text-secondary);
}
.rec-video-info .rec-meta {
    font-size: 12px;
    color: var(--text-secondary);
}

/* ===== LOADING ===== */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    color: var(--text-secondary);
}
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--bg-tertiary);
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 12px;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== MOBILE BOTTOM NAV ===== */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    z-index: 1001;
    padding: 4px 0;
}
.mobile-bottom-nav {
    display: none;
    justify-content: space-around;
    align-items: center;
}
.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 6px 0;
    font-size: 10px;
    color: var(--text-secondary);
    gap: 2px;
    cursor: pointer;
    transition: color 0.2s;
    text-decoration: none;
}
.mobile-nav-item i {
    font-size: 20px;
}
.mobile-nav-item.active {
    color: var(--text-primary);
}
.mobile-nav-item.upload-nav i {
    font-size: 28px;
    color: var(--accent-color);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1200px) {
    .watch-secondary {
        width: 360px;
    }
}

@media (max-width: 1024px) {
    .watch-container {
        flex-direction: column;
    }
    .watch-secondary {
        width: 100%;
    }
    .rec-video-card {
        flex-direction: row;
    }
}

@media (max-width: 900px) {
    .sidebar {
        transform: translateX(-100%);
        z-index: 1001;
        background: var(--bg-secondary);
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0 !important;
    }
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .header-center {
        display: none;
    }
    .header-right .icon-btn:not(:last-child) {
        display: none;
    }
    .mobile-bottom-nav {
        display: flex !important;
    }
    .video-grid {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 0;
    }
    .main-content {
        padding: 12px;
        padding-bottom: 80px;
    }
    .watch-container {
        padding: 0;
    }
    .video-player-wrapper {
        border-radius: 0;
    }
    .video-info-section {
        padding: 12px;
    }
    .video-actions {
        margin-left: 0;
        margin-top: 8px;
        overflow-x: auto;
    }
    .watch-secondary {
        padding: 0 12px;
    }
    .comments-section {
        padding: 0 12px;
    }
    .short-card {
        min-width: 150px;
        max-width: 150px;
    }
    .short-card .short-thumbnail {
        height: 260px;
    }
}

@media (max-width: 480px) {
    .header-left {
        min-width: auto;
    }
    .logo-text {
        font-size: 18px;
    }
    .header {
        padding: 0 8px;
    }
}


/* ===== SECTION 3 ENHANCEMENTS ===== */
/* ===== ADD THESE TO YOUR EXISTING style.css FILE ===== */

/* ===== ENHANCED ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes bounceIn {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes ripple {
    0% { transform: scale(0); opacity: 0.5; }
    100% { transform: scale(4); opacity: 0; }
}

@keyframes heartBeat {
    0% { transform: scale(1); }
    14% { transform: scale(1.3); }
    28% { transform: scale(1); }
    42% { transform: scale(1.3); }
    70% { transform: scale(1); }
}

/* ===== SKELETON LOADING ===== */
.skeleton {
    background: linear-gradient(90deg, 
        var(--bg-tertiary) 25%, 
        var(--bg-hover) 50%, 
        var(--bg-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 8px;
}

.skeleton-card {
    border-radius: 12px;
    overflow: hidden;
}

.skeleton-thumbnail {
    width: 100%;
    padding-top: 56.25%;
    border-radius: 12px;
}

.skeleton-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
}

.skeleton-text {
    height: 14px;
    border-radius: 4px;
    margin-bottom: 8px;
}

.skeleton-text.short {
    width: 60%;
}

.skeleton-text.medium {
    width: 80%;
}

.skeleton-text.long {
    width: 95%;
}

.skeleton-row {
    display: flex;
    gap: 12px;
    padding: 12px 0;
}

/* ===== VIDEO CARD ANIMATIONS ===== */
.video-card {
    animation: fadeInUp 0.4s ease;
    animation-fill-mode: both;
}

.video-card:nth-child(1) { animation-delay: 0.05s; }
.video-card:nth-child(2) { animation-delay: 0.1s; }
.video-card:nth-child(3) { animation-delay: 0.15s; }
.video-card:nth-child(4) { animation-delay: 0.2s; }
.video-card:nth-child(5) { animation-delay: 0.25s; }
.video-card:nth-child(6) { animation-delay: 0.3s; }
.video-card:nth-child(7) { animation-delay: 0.35s; }
.video-card:nth-child(8) { animation-delay: 0.4s; }

/* ===== HOVER PREVIEW OVERLAY ===== */
.video-card .hover-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
    border-radius: 12px;
}

.video-card:hover .hover-overlay {
    opacity: 1;
}

.hover-play-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    transform: scale(0.8);
    transition: transform 0.2s;
}

.video-card:hover .hover-play-icon {
    transform: scale(1);
}

/* ===== WATCH LATER TOOLTIP ===== */
.thumbnail-actions {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 5;
}

.video-card:hover .thumbnail-actions {
    opacity: 1;
}

.thumb-action-btn {
    width: 32px;
    height: 32px;
    border-radius: 4px;
    background: rgba(0,0,0,0.7);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: background 0.2s;
}

.thumb-action-btn:hover {
    background: rgba(0,0,0,0.9);
}

/* ===== PROGRESS BAR ON THUMBNAIL ===== */
.watch-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: #ff0000;
    border-radius: 0 0 0 12px;
    z-index: 3;
}

/* ===== TOOLTIP ===== */
.tooltip {
    position: relative;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 12px;
    background: #616161;
    color: white;
    font-size: 12px;
    border-radius: 4px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 100;
}

.tooltip:hover::after {
    opacity: 1;
}

/* ===== NOTIFICATION PANEL ===== */
.notification-panel {
    position: fixed;
    top: var(--header-height);
    right: 16px;
    width: 360px;
    max-height: 500px;
    background: var(--bg-secondary);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
    z-index: 1100;
    display: none;
    overflow: hidden;
    animation: fadeInScale 0.2s ease;
    border: 1px solid var(--border-color);
}

.notification-panel.open {
    display: block;
}

.notification-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.notification-header h3 {
    font-size: 16px;
}

.notification-list {
    max-height: 400px;
    overflow-y: auto;
    padding: 8px 0;
}

.notification-item {
    display: flex;
    gap: 12px;
    padding: 12px 20px;
    cursor: pointer;
    transition: background 0.2s;
}

.notification-item:hover {
    background: var(--bg-tertiary);
}

.notification-item.unread {
    background: rgba(62, 166, 255, 0.05);
}

.notification-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    flex-shrink: 0;
}

.notification-content {
    flex: 1;
    min-width: 0;
}

.notification-content p {
    font-size: 13px;
    line-height: 1.4;
    margin-bottom: 4px;
}

.notification-content .notif-time {
    font-size: 11px;
    color: var(--text-secondary);
}

.notification-thumb {
    width: 80px;
    height: 45px;
    border-radius: 4px;
    overflow: hidden;
    flex-shrink: 0;
}

.notification-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ===== MINI PLAYER ===== */
.mini-player {
    position: fixed;
    bottom: 80px;
    right: 20px;
    width: 320px;
    background: var(--bg-secondary);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
    z-index: 900;
    display: none;
    animation: slideInRight 0.3s ease;
    border: 1px solid var(--border-color);
}

.mini-player.active {
    display: block;
}

.mini-player-video {
    width: 100%;
    aspect-ratio: 16/9;
    background: #000;
}

.mini-player-video iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.mini-player-info {
    padding: 8px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mini-player-info .mini-title {
    font-size: 13px;
    font-weight: 500;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-right: 8px;
}

.mini-player-controls {
    display: flex;
    gap: 4px;
}

.mini-player-controls button {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.mini-player-controls button:hover {
    background: var(--bg-tertiary);
}

/* ===== SEARCH SUGGESTIONS ===== */
.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 64px;
    background: var(--bg-secondary);
    border-radius: 0 0 12px 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    z-index: 1100;
    display: none;
    overflow: hidden;
    border: 1px solid var(--border-color);
    border-top: none;
}

.search-suggestions.open {
    display: block;
}

.suggestion-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    cursor: pointer;
    transition: background 0.1s;
    font-size: 14px;
}

.suggestion-item:hover {
    background: var(--bg-tertiary);
}

.suggestion-item i {
    color: var(--text-secondary);
    font-size: 16px;
    width: 20px;
    text-align: center;
}

/* ===== SHARE MODAL ===== */
.share-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.7);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(4px);
}

.share-modal-overlay.visible {
    display: flex;
}

.share-modal {
    background: var(--bg-secondary);
    border-radius: 16px;
    width: 100%;
    max-width: 500px;
    overflow: hidden;
    animation: fadeInScale 0.2s ease;
}

.share-modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.share-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    padding: 24px;
}

.share-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 12px;
    border-radius: 8px;
    transition: background 0.2s;
    border: none;
    background: none;
    color: var(--text-primary);
    font-family: 'Roboto', sans-serif;
}

.share-option:hover {
    background: var(--bg-tertiary);
}

.share-option .share-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
}

.share-option span {
    font-size: 12px;
    color: var(--text-secondary);
}

.share-url-box {
    display: flex;
    margin: 0 24px 24px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.share-url-box input {
    flex: 1;
    padding: 10px 14px;
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
    font-family: 'Roboto', sans-serif;
}

.share-url-box button {
    padding: 10px 20px;
    background: #3ea6ff;
    border: none;
    color: #0f0f0f;
    font-weight: 600;
    cursor: pointer;
    font-size: 13px;
    font-family: 'Roboto', sans-serif;
    transition: background 0.2s;
}

.share-url-box button:hover {
    background: #65b8ff;
}

/* ===== CONTEXT MENU ===== */
.context-menu {
    position: fixed;
    background: var(--bg-secondary);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
    z-index: 2000;
    min-width: 220px;
    padding: 8px 0;
    display: none;
    border: 1px solid var(--border-color);
    animation: fadeInScale 0.15s ease;
}

.context-menu.visible {
    display: block;
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
    transition: background 0.1s;
}

.context-menu-item:hover {
    background: var(--bg-tertiary);
}

.context-menu-item i {
    width: 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 16px;
}

.context-menu-divider {
    height: 1px;
    background: var(--border-color);
    margin: 4px 0;
}

/* ===== BACK TO TOP ===== */
.back-to-top {
    position: fixed;
    bottom: 90px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 18px;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 800;
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.back-to-top.visible {
    display: flex;
}

.back-to-top:hover {
    background: var(--bg-hover);
    transform: translateY(-2px);
}

/* ===== RIPPLE EFFECT ===== */
.ripple-container {
    position: relative;
    overflow: hidden;
}

.ripple-effect {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    animation: ripple 0.6s linear;
    pointer-events: none;
}

/* ===== THEME COLORS FOR CHIPS ===== */
.chip[data-category="music"] { border-left: 3px solid #e91e63; }
.chip[data-category="gaming"] { border-left: 3px solid #9c27b0; }
.chip[data-category="education"] { border-left: 3px solid #2196f3; }
.chip[data-category="comedy"] { border-left: 3px solid #ff9800; }
.chip[data-category="tech"] { border-left: 3px solid #00bcd4; }
.chip[data-category="news"] { border-left: 3px solid #f44336; }
.chip[data-category="sports"] { border-left: 3px solid #4caf50; }
.chip[data-category="cooking"] { border-left: 3px solid #ff5722; }
.chip[data-category="travel"] { border-left: 3px solid #009688; }
.chip[data-category="fitness"] { border-left: 3px solid #8bc34a; }
.chip[data-category="movies"] { border-left: 3px solid #673ab7; }
.chip[data-category="all"] { border-left: 3px solid #ffffff; }

/* ===== LIVE BADGE ===== */
.live-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: #ff0000;
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    animation: pulse 2s infinite;
}

/* ===== NEW BADGE ===== */
.new-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: #3ea6ff;
    color: #0f0f0f;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
}

/* ===== VERIFIED BADGE ===== */
.verified-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--text-secondary);
    color: var(--bg-primary);
    font-size: 8px;
}

/* ===== SCROLL INDICATOR ===== */
.scroll-indicator {
    position: fixed;
    top: var(--header-height);
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, #ff0000, #ff4444, #ff0000);
    z-index: 999;
    transition: width 0.1s linear;
}

/* ===== FOCUS VISIBLE ===== */
*:focus-visible {
    outline: 2px solid #3ea6ff;
    outline-offset: 2px;
}

/* ===== PRINT STYLES ===== */
@media print {
    .header, .sidebar, .mobile-bottom-nav, .back-to-top {
        display: none !important;
    }
    .main-content {
        margin: 0 !important;
    }
    body {
        background: white;
        color: black;
    }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== HIGH CONTRAST ===== */
@media (prefers-contrast: high) {
    :root {
        --bg-primary: #000000;
        --bg-secondary: #111111;
        --bg-tertiary: #222222;
        --text-primary: #ffffff;
        --text-secondary: #cccccc;
        --border-color: #555555;
    }
}