style.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', Arial, sans-serif;
    background: #f9f9f9;
    overflow-x: hidden;
}

/* ── HEADER ── */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
    background: white;
    border-bottom: 1px solid #e5e5e5;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    z-index: 1000;
}

.left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.menu-btn {
    font-size: 22px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    color: #0f0f0f;
}

.menu-btn:hover {
    background: #e5e5e5;
}

.logo {
    display: flex;
    align-items: center;
    gap: 2px;
    cursor: pointer;
}

.yt-icon {
    font-size: 30px;
    color: #ff0000;
}

.logo h2 {
    font-size: 18px;
    font-weight: 700;
    color: #0f0f0f;
    letter-spacing: -0.5px;
}

/* ── SEARCH ── */
.middle {
    display: flex;
    align-items: center;
    flex: 1;
    max-width: 580px;
    margin: 0 40px;
}

.middle input {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid #ccc;
    border-radius: 20px 0 0 20px;
    outline: none;
    font-size: 15px;
    background: #f8f8f8;
    transition: border 0.2s;
}

.middle input:focus {
    border-color: #1a73e8;
    background: white;
}

.middle button {
    padding: 10px 18px;
    border: 1px solid #ccc;
    border-left: none;
    border-radius: 0 20px 20px 0;
    background: #f2f2f2;
    cursor: pointer;
    font-size: 18px;
    color: #333;
    transition: background 0.2s;
}

.middle button:hover {
    background: #e0e0e0;
}

/* ── RIGHT ICONS ── */
.right {
    display: flex;
    align-items: center;
    gap: 4px;
}

.icon-btn {
    font-size: 22px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    color: #0f0f0f;
}

.icon-btn:hover {
    background: #e5e5e5;
}

/* ── NOTIFICATION ── */
.notif-wrapper {
    position: relative;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    transition: background 0.2s;
    color: #0f0f0f;
}

.notif-wrapper:hover {
    background: #e5e5e5;
}

.notif-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    background: #ff0000;
    color: white;
    font-size: 10px;
    font-weight: 700;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ── NOTIFICATION DROPDOWN ── */
.notif-dropdown {
    position: fixed;
    top: 60px;
    right: 16px;
    width: 320px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.15);
    z-index: 500;
    padding: 16px;
    display: none;
}

.notif-dropdown.show {
    display: block;
}

.notif-dropdown h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #0f0f0f;
    border-bottom: 1px solid #e5e5e5;
    padding-bottom: 10px;
}

.notif-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 6px;
    border-bottom: 1px solid #f2f2f2;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.15s;
}

.notif-item:hover {
    background: #f9f9f9;
}

.notif-item i {
    font-size: 22px;
    color: #606060;
    margin-top: 2px;
}

.notif-item p {
    font-size: 14px;
    color: #0f0f0f;
    margin-bottom: 4px;
}

.notif-item span {
    font-size: 12px;
    color: #606060;
}

/* ── SIGN IN BUTTON ── */
.signin-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid #1a73e8;
    border-radius: 20px;
    background: transparent;
    color: #1a73e8;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    white-space: nowrap;
}

.signin-btn:hover {
    background: #e8f0fe;
}

.signin-btn i {
    font-size: 18px;
}

/* ── AVATAR ── */
.avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: #1a73e8;
    color: white;
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

/* ── SIGN IN MODAL ── */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-overlay.show {
    display: flex;
}

.modal {
    background: white;
    border-radius: 16px;
    width: 400px;
    padding: 32px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

.modal-header {
    text-align: center;
    margin-bottom: 24px;
}

.modal-yt-icon {
    font-size: 48px;
    color: #ff0000;
}

.modal-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: #0f0f0f;
    margin-top: 8px;
}

.modal-header p {
    font-size: 14px;
    color: #606060;
    margin-top: 4px;
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 24px;
}

.modal-body input {
    padding: 12px 16px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 15px;
    outline: none;
    transition: border 0.2s;
    width: 100%;
}

.modal-body input:focus {
    border-color: #1a73e8;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.cancel-btn {
    padding: 10px 20px;
    border: none;
    background: transparent;
    color: #1a73e8;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.2s;
}

.cancel-btn:hover {
    background: #e8f0fe;
}

.confirm-btn {
    padding: 10px 24px;
    border: none;
    background: #1a73e8;
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.2s;
}

.confirm-btn:hover {
    background: #1558b0;
}

/* ── CHIPS BAR ── */
.chips-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: white;
    border-bottom: 1px solid #e5e5e5;
    position: fixed;
    top: 56px;
    left: 240px;
    right: 0;
    z-index: 99;
    overflow-x: auto;
    scrollbar-width: none;
}

.chips-bar::-webkit-scrollbar {
    display: none;
}

.chip {
    padding: 6px 14px;
    background: #f2f2f2;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    white-space: nowrap;
    color: #0f0f0f;
    font-weight: 500;
    transition: background 0.15s;
    flex-shrink: 0;
}

.chip:hover {
    background: #e0e0e0;
}

.chip.active {
    background: #0f0f0f;
    color: white;
}

/* ── MAIN LAYOUT ── */
.main {
    display: flex;
    margin-top: 106px;
    min-height: calc(100vh - 106px);
    position: relative;
}

/* ── SIDEBAR ── */
.sidebar {
    width: 240px;
    min-width: 240px;
    padding: 10px 0;
    background: white;
    height: calc(100vh - 106px);
    overflow-y: auto;
    scrollbar-width: none;
    border-right: 1px solid #f2f2f2;
    position: sticky;
    top: 106px;
}

.sidebar::-webkit-scrollbar {
    display: none;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 10px 24px;
    cursor: pointer;
    border-radius: 10px;
    margin: 1px 8px;
    color: #0f0f0f;
    font-size: 14px;
    font-weight: 400;
    transition: background 0.15s;
}

.sidebar-item:hover {
    background: #f2f2f2;
}

.sidebar-item.active {
    background: #f2f2f2;
    font-weight: 700;
}

.sidebar-item i {
    font-size: 20px;
    width: 24px;
    text-align: center;
    color: #0f0f0f;
}

.sidebar hr {
    border: none;
    border-top: 1px solid #e5e5e5;
    margin: 10px 0;
}

.section-title {
    padding: 8px 24px;
    font-size: 14px;
    font-weight: 600;
    color: #0f0f0f;
}

.yt-premium i { color: #ff0000; }
.yt-music i   { color: #ff0000; }
.yt-kids i    { color: #ff6600; }

/* ── SIDEBAR OVERLAY (mobile) ── */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 149;
}

.sidebar-overlay.show {
    display: block;
}

/* ── CONTENT GRID ── */
.content {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
    padding: 16px;
    align-content: start;
}

/* ── VIDEO CARD ── */
.video-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

/* ── THUMBNAIL ── */
.thumbnail {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000;
    overflow: hidden;
    position: relative;
}

.thumbnail iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
    pointer-events: none;
}

/* ── VIDEO INFO ── */
.video-info {
    display: flex;
    flex-direction: row;
    gap: 12px;
    padding: 12px;
}

.channel-icon {
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: 50%;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 15px;
}

.video-details {
    flex: 1;
    min-width: 0;
}

.video-title {
    font-size: 14px;
    font-weight: 600;
    color: #0f0f0f;
    line-height: 1.4;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.channel-name {
    font-size: 13px;
    color: #606060;
    margin-bottom: 2px;
}

.video-meta {
    font-size: 12px;
    color: #606060;
}

/* ── MOBILE PLAYING STATE ── */
.video-card.playing {
    outline: 2px solid #ff0000;
}

/* ── RESPONSIVE: TABLET ── */
@media (max-width: 1024px) {
    .content {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
}

/* ── RESPONSIVE: MOBILE ── */
@media (max-width: 900px) {

    /* Hide sidebar by default, slide in when open */
    .sidebar {
        position: fixed;
        top: 56px;
        left: -240px;
        height: calc(100vh - 56px);
        z-index: 150;
        transition: left 0.3s ease;
        display: block;
    }

    .sidebar.open {
        left: 0;
    }

    /* Chips bar goes full width */
    .chips-bar {
        left: 0;
    }

    /* Content fills full width */
    .content {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        padding: 12px;
    }
}

@media (max-width: 600px) {
    .middle {
        margin: 0 8px;
    }

    .middle input {
        font-size: 14px;
        padding: 8px 12px;
    }

    .logo h2 {
        display: none;
    }

    .icon-btn {
        display: none;
    }

    .content {
        grid-template-columns: 1fr;
        padding: 8px;
        gap: 12px;
    }

    .modal {
        width: 92%;
        padding: 24px;
    }

    .notif-dropdown {
        width: calc(100vw - 32px);
        right: 16px;
    }
}