:root {
    --bg: #09111f;
    --panel: rgba(9, 17, 31, 0.84);
    --panel-strong: #0f1b31;
    --panel-soft: #13233f;
    --border: rgba(163, 184, 210, 0.18);
    --text: #f7fafc;
    --muted: #9cb0c9;
    --accent: #5eead4;
    --accent-2: #f59e0b;
    --danger: #f87171;
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    font-family: 'Space Grotesk', sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(94, 234, 212, 0.16), transparent 28%),
        radial-gradient(circle at top right, rgba(245, 158, 11, 0.18), transparent 24%),
        linear-gradient(180deg, #050b15 0%, #09111f 100%);
}

body {
    padding: 24px;
}

button,
input,
video {
    font: inherit;
}

.app-shell {
    max-width: 1480px;
    margin: 0 auto;
}

.topbar,
.sidebar,
.player-panel,
.channel-panel {
    background: var(--panel);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    border-radius: 24px;
}

.topbar h1,
.sidebar h2,
.player-header h2,
.channel-panel-header h2 {
    margin: 0;
}

.eyebrow {
    margin: 0 0 6px;
    color: var(--accent);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
}

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

.pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(19, 35, 63, 0.95);
    border: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.9rem;
}

.secondary-button {
    border: 0;
    border-radius: 999px;
    padding: 10px 18px;
    background: linear-gradient(135deg, var(--accent), #22c55e);
    color: #04111d;
    font-weight: 700;
    cursor: pointer;
}

.layout {
    display: grid;
    grid-template-columns: 310px 1fr;
    gap: 20px;
    margin-top: 20px;
}

.sidebar,
.player-panel,
.channel-panel {
    border-radius: 24px;
}

.sidebar {
    padding: 18px;
    min-height: 72vh;
}

.sidebar-header,
.channel-panel-header,
.player-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.sidebar-header p,
.channel-panel-header p {
    margin: 0;
    color: var(--muted);
}

.category-list {
    display: grid;
    gap: 10px;
    margin-top: 18px;
}

.category-button {
    width: 100%;
    border: 1px solid transparent;
    border-radius: 16px;
    background: var(--panel-strong);
    color: var(--text);
    text-align: left;
    padding: 14px 16px;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.category-button:hover,
.category-button.is-active {
    transform: translateY(-1px);
    background: linear-gradient(135deg, rgba(94, 234, 212, 0.14), rgba(245, 158, 11, 0.12));
    border-color: rgba(94, 234, 212, 0.4);
}

.content {
    display: grid;
    gap: 20px;
}

.player-panel,
.channel-panel {
    padding: 20px;
}

.player-frame {
    position: relative;
    overflow: hidden;
    margin-top: 18px;
    border-radius: 22px;
    border: 1px solid var(--border);
    background:
        linear-gradient(135deg, rgba(15, 27, 49, 0.88), rgba(6, 15, 28, 0.96)),
        linear-gradient(180deg, rgba(94, 234, 212, 0.06), transparent);
    aspect-ratio: 16 / 9;
}

#videoPlayer {
    width: 100%;
    height: 100%;
    display: block;
    background: #000;
}

.player-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    color: var(--muted);
    text-align: center;
    background:
        radial-gradient(circle at center, rgba(94, 234, 212, 0.08), transparent 40%),
        rgba(4, 10, 18, 0.78);
}

.player-note {
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.search-input {
    width: min(320px, 100%);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 11px 16px;
    background: var(--panel-strong);
    color: var(--text);
}

.status-banner {
    margin-top: 18px;
    padding: 12px 14px;
    border-radius: 16px;
    background: rgba(94, 234, 212, 0.1);
    border: 1px solid rgba(94, 234, 212, 0.18);
    color: var(--muted);
}

.status-banner.is-error {
    background: rgba(248, 113, 113, 0.1);
    border-color: rgba(248, 113, 113, 0.26);
    color: #fecaca;
}

.stream-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 14px;
    margin-top: 18px;
}

.stream-card {
    display: grid;
    gap: 12px;
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 14px;
    background: linear-gradient(180deg, rgba(19, 35, 63, 0.95), rgba(9, 17, 31, 0.95));
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.stream-card:hover {
    transform: translateY(-2px);
    border-color: rgba(245, 158, 11, 0.42);
}

.stream-card img,
.stream-card-fallback {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(94, 234, 212, 0.18), rgba(245, 158, 11, 0.18));
}

.stream-card-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    font-size: 2rem;
    font-weight: 700;
}

.stream-card h3 {
    margin: 0;
    font-size: 1rem;
}

.stream-card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.88rem;
}

.empty-state {
    grid-column: 1 / -1;
    padding: 28px;
    border: 1px dashed var(--border);
    border-radius: 20px;
    text-align: center;
    color: var(--muted);
}

@media (max-width: 1080px) {
    .layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        min-height: auto;
    }
}

@media (max-width: 720px) {
    body {
        padding: 14px;
    }

    .topbar,
    .player-panel,
    .channel-panel,
    .sidebar {
        border-radius: 20px;
    }

    .topbar,
    .sidebar-header,
    .player-header,
    .channel-panel-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .topbar-actions {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .pill,
    .secondary-button,
    .search-input {
        width: 100%;
    }

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