/* =========================
   YouTube Clone - Style Sheet
   ========================= */

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

body {
    font-family: 'Roboto', 'Arial', sans-serif;
    background-color: #0f0f0f;
    color: #ffffff;
    line-height: 1.6;
}

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

button {
    cursor: pointer;
    font-family: inherit;
}

/* === HEADER === */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 24px;
    background-color: #212121;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 24px;
}

.menu-icon {
    cursor: pointer;
    font-size: 24px;
    padding: 8px;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.menu-icon:hover {
    background-color: #3d3d3d;
}

.logo {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 20px;
    font-weight: bold;
    transition: opacity 0.2s;
}

.logo:hover {
    opacity: 0.85;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #ff0000 0%, #cc0000 100%);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(255, 0, 0, 0.3);
}

/* === SEARCH === */
.header-center {
    flex: 1;
    max-width: 640px;
    display: flex;
    margin: 0 40px;
}

.search-bar {
    width: 100%;
    padding: 11px 16px;
    background-color: #121212;
    border: 1px solid #303030;
    border-radius: 40px 0 0 40px;
    color: #ffffff;
    outline: none;
    font-size: 16px;
    transition: border-color 0.2s;
}

.search-bar:focus {
    border-color: #1c62b9;
}

.search-bar::placeholder {
    color: #888;
}

.search-btn {
    padding: 0 24px;
    background-color: #222222;
    border: 1px solid #303030;
    border-left: none;
    border-radius: 0 40px 40px 0;
    color: #ffffff;
    font-size: 18px;
    transition: background-color 0.2s;
}

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

/* === HEADER RIGHT === */
.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header-icon {
    font-size: 24px;
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.2s;
}

.header-icon:hover {
    background-color: #3d3d3d;
}

.user-avatar {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #ff0000 0%, #cc0000 100%);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s;
}

.user-avatar:hover {
    transform: scale(1.1);
}

/* === SIDEBAR === */
.sidebar {
    position: fixed;
    left: 0;
    top: 56px;
    width: 240px;
    height: calc(100vh - 56px);
    background-color: #212121;
    padding: 12px 0;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: #717171 #212121;
}

.sidebar::-webkit-scrollbar {
    width: 8px;
}

.sidebar::-webkit-scrollbar-track {
    background: #212121;
}

.sidebar::-webkit-scrollbar-thumb {
    background-color: #717171;
    border-radius: 10px;
}

.sidebar-item {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    cursor: pointer;
    gap: 24px;
    font-size: 14px;
    transition: background-color 0.2s;
}

.sidebar-item:hover {
    background-color: #3d3d3d;
}

.sidebar-item.active {
    background-color: #3d3d3d;
    font-weight: 500;
}

.sidebar-divider {
    height: 1px;
    background-color: #3d3d3d;
    margin: 12px 0;
}

/* === MAIN CONTENT === */
.main {
    margin-left: 240px;
    margin-top: 70px;
    padding: 24px;
    min-height: calc(100vh - 70px);
}

/* === CATEGORIES === */
.categories {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    overflow-x: auto;
    padding-bottom: 12px;
    scrollbar-width: thin;
    scrollbar-color: #717171 transparent;
}

.categories::-webkit-scrollbar {
    height: 8px;
}

.categories::-webkit-scrollbar-track {
    background: transparent;
}

.categories::-webkit-scrollbar-thumb {
    background-color: #717171;
    border-radius: 10px;
}

.category-btn {
    padding: 10px 18px;
    background-color: #272727;
    border: none;
    border-radius: 8px;
    color: #ffffff;
    white-space: nowrap;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.category-btn:hover {
    background-color: #3d3d3d;
}

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

/* === VIDEOS GRID === */
.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.video-card {
    cursor: pointer;
    display: block;
    transition: transform 0.2s;
}

.video-card:hover {
    transform: translateY(-4px);
}

.video-card:hover .video-thumbnail {
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

.video-thumbnail {
    width: 100%;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    margin-bottom: 12px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    transition: all 0.3s;
    overflow: hidden;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
}

.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background-color: rgba(0, 0, 0, 0.85);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.video-info {
    display: flex;
    gap: 12px;
}

.channel-avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #ff0000 0%, #cc0000 100%);
    border-radius: 50%;
    flex-shrink: 0;
}

.video-details h3 {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-metadata {
    font-size: 12px;
    color: #aaaaaa;
}

/* === WATCH PAGE === */
.watch-container {
    margin-top: 70px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    max-width: 100%;    margin-left: auto;
    margin-right: auto;
}
    max-width: 1600px;.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
    color: #aaaaaa;
    font-size: 14px;
    font-weight: 500;
    background: none;
    border: none;
    padding: 8px 12px;
    border-radius: 8px;
    transition: all 0.2s;
}

.back-btn:hover {
    background-color: #272727;
    color: #ffffff;
}

.player-wrapper {
    width: 100%;
    background: #000000;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
}

.player-wrapper video {
    width: 100%;
    max-height: none;    display: block;}

.video-info-section {
    width: 100%;
}

.video-info-section h1 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.4;
}

.video-channel-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding: 12px 0;
}

.channel-name {
    font-size: 15px;
    font-weight: 500;
}

.video-meta {
    font-size: 13px;
    color: #aaaaaa;
    margin-top: 4px;
}

/* === LOADING & ERRORS === */
.loading-msg,
.error-msg {
    grid-column: 1 / -1;
    text-align: center;
    color: #aaaaaa;
    padding: 60px 20px;
    font-size: 16px;
}

.error-msg strong {
    color: #ffffff;
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .videos-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 72px;
    }

    .sidebar-item span {
        display: none;
    }

    .sidebar-item {
        justify-content: center;
        padding: 16px 0;
    }

    .main {
        margin-left: 72px;
    }

    .header-center {
        margin: 0 20px;
    }

    .videos-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 16px;
    }

    .watch-container {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 10px 12px;
    }

    .header-center {
        max-width: none;
        margin: 0 12px;
    }

    .search-bar {
        font-size: 14px;
        padding: 9px 12px;
    }

    .videos-grid {
        grid-template-columns: 1fr;
    }

    .main {
        padding: 16px;
    }
}