:root {
    color-scheme: dark;

    --bg: #05060a;
    --bg-elevated: #0c0f18;
    --border-subtle: #181c26;
    --text: #f5f5f5;
    --text-soft: #a0a4b4;
    --accent: #4f82ff;
    --accent-soft: rgba(79, 130, 255, 0.25);
    --danger: #ff4f6a;
    --radius-lg: 1rem;
    --radius-md: 0.75rem;
    --transition-fast: 150ms ease-out;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: radial-gradient(circle at top, #10162b 0, #05060a 55%, #020308 100%);
    color: var(--text);
    display: flex;
    justify-content: center;
    align-items: stretch;
}

.app {
    width: 100%;
    max-width: 960px;
    padding: 1rem 1.25rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Header */

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.title-block {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.app-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.status {
    font-size: 0.85rem;
    color: var(--text-soft);
}

.active-users {
    font-size: 0.8rem;
    color: var(--text-soft);
}

/* Skip button */

.skip-btn {
    border: 1px solid var(--border-subtle);
    background: linear-gradient(135deg, #15192a, #101426);
    color: var(--text);
    border-radius: 999px;
    padding: 0.45rem 1.1rem;
    font-size: 0.9rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.02), 0 10px 30px rgba(0, 0, 0, 0.65);
}

.skip-btn::before {
    content: "⏭";
    font-size: 0.95rem;
}

.skip-btn:hover {
    background: linear-gradient(135deg, #1d2235, #151a2b);
    border-color: var(--accent-soft);
    box-shadow: 0 0 0 1px var(--accent-soft), 0 12px 36px rgba(0, 0, 0, 0.8);
    transform: translateY(-1px);
}

.skip-btn:active {
    transform: translateY(0);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.7);
}

/* Videos: stacked layout */

.videos {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.video-slot {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background: radial-gradient(circle at top left, rgba(79, 130, 255, 0.12), transparent 60%),
        var(--bg-elevated);
    border-radius: var(--radius-lg);
    padding: 0.65rem;
    border: 1px solid var(--border-subtle);
    box-shadow:
        0 18px 50px rgba(0, 0, 0, 0.85),
        0 0 0 1px rgba(255, 255, 255, 0.02);
    overflow: hidden;
}

.remote-slot {
    /* Slight visual emphasis on the stranger */
}

.local-slot {
    background:
        radial-gradient(circle at bottom right, rgba(255, 255, 255, 0.06), transparent 55%),
        var(--bg-elevated);
}

/* Labels & headers */

.video-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--text-soft);
}

/* Video frame */

.video-frame {
    position: relative;
    flex: 1;
    min-height: 0;
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #000;
}

.video-frame::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    mix-blend-mode: screen;
    opacity: 0.5;
    background:
        radial-gradient(circle at 10% 0%, rgba(79, 130, 255, 0.25), transparent 55%),
        radial-gradient(circle at 90% 100%, rgba(255, 255, 255, 0.18), transparent 60%);
}

video {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    background: #000;
}

/* Mobile adjustments */

@media (max-width: 600px) {
    .app {
        padding: 0.75rem;
    }

    .app-title {
        font-size: 1rem;
    }

    .status {
        font-size: 0.8rem;
    }

    .skip-btn {
        padding: 0.4rem 0.95rem;
        font-size: 0.85rem;
    }

    .video-slot {
        padding: 0.55rem;
    }
}

@media (orientation: landscape) {
    .videos {
        flex-direction: row;
        align-items: stretch;
    }

    .video-slot {
        min-width: 0;
    }

    .local-slot {
        order: 1;
    }

    .remote-slot {
        order: 2;
    }
}

/* Ensure reasonable height split on tall screens */

@media (min-height: 700px) {
    .videos {
        min-height: calc(100vh - 5.5rem);
    }
}