:root {
    --bg: #0d1117;
    --surface: #161b22;
    --border: #30363d;
    --text: #f0f6fc;
    --muted: #8b949e;
    --accent: #58a6ff;
    --now: #3fb950;
    --next: #d29922;
    --past: #484f58;
    --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

html {
    height: 100%;
}

html,
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    line-height: 1.35;
}

a {
    color: var(--accent);
    text-decoration: none;
}

/* --- Room signage (40" TV @ 1080p, no scroll) --- */
.page-room {
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    display: grid;
    grid-template-rows: auto auto 1fr auto auto;
    font-size: 30px;
}

.page-room__body {
    min-height: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    padding: 0 1.5rem;
}

.page-room .site-header {
    flex-shrink: 0;
    padding: 0.5rem 1.5rem;
    border-bottom: 2px solid var(--border);
    background: var(--surface);
}

.page-room .site-header--room {
    display: flex;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: flex-end;
    gap: 1rem;
}

.page-room .event-name {
    margin: 0;
    font-size: 0.8rem;
    letter-spacing: 0.06em;
}

.page-room h1 {
    font-size: 2.4rem;
    line-height: 1.05;
}

.page-room .room-subtitle {
    margin: 0.15rem 0 0;
    font-size: 1rem;
}

.page-room .date-label {
    margin: 0;
    font-size: 0.95rem;
}

.page-room .clock {
    font-size: 1.9rem;
    line-height: 1.1;
}

.page-room .test-clock-banner,
.page-room .warn-banner {
    padding: 0.35rem 1.5rem;
    font-size: 0.85rem;
}

.page-room .hero-row {
    flex: 0 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    padding: 0.5rem 0 0;
    max-height: 36vh;
    min-height: 0;
}

.page-room .hero {
    padding: 0.6rem 0.85rem;
    border-radius: 8px;
    min-height: 0;
    overflow: hidden;
}

.page-room .hero--empty {
    grid-column: 1 / -1;
}

.page-room .hero__label {
    margin: 0 0 0.25rem;
    font-size: 0.85rem;
}

.page-room .hero__time {
    margin: 0 0 0.3rem;
    font-size: 0.95rem;
}

.page-room .hero__session {
    font-size: 1.55rem;
    line-height: 1.15;
}

.page-room .hero__speaker {
    margin: 0.4rem 0 0;
    font-size: 1.2rem;
}

.page-room .hero__field-label {
    font-size: 0.75rem;
    margin-bottom: 0.1rem;
}

.page-room .hero__description {
    margin: 0.35rem 0 0;
    font-size: 0.95rem;
    line-height: 1.35;
    -webkit-line-clamp: 2;
}

.page-room .schedule-list {
    flex: 1 1 auto;
    min-height: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    padding: 0.4rem 0 0.25rem;
}

.page-room .schedule-list__heading {
    flex-shrink: 0;
    margin: 0 0 0.35rem;
    font-size: 0.9rem;
}

.page-room .schedule-list__items,
.page-room .schedule-list ul {
    flex: 1 1 auto;
    min-height: 0;
    overflow: hidden;
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.page-room .session {
    flex-shrink: 0;
    display: grid;
    grid-template-columns: 10.5em 1fr;
    gap: 0.75rem;
    align-items: center;
    padding: 0.35rem 0;
    border-bottom: 1px solid var(--border);
}

.page-room .session--now {
    background: rgba(63, 185, 80, 0.08);
    margin: 0 -0.4rem;
    padding-left: 0.4rem;
    padding-right: 0.4rem;
    border-radius: 6px;
    border-bottom-color: transparent;
}

.page-room .session--past {
    display: none;
}

.page-room .session__time {
    font-size: 0.95rem;
    font-weight: 600;
}

.page-room .session__body {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
    min-width: 0;
    overflow: hidden;
}

.page-room .session__title {
    flex: 0 1 auto;
    min-width: 0;
    font-size: 1.05rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.page-room .session__speakers {
    flex: 0 0 auto;
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--muted);
    white-space: nowrap;
}

.page-room .session__speakers::before {
    content: "— ";
}

.page-room .schedule-list__empty {
    margin: 0;
    font-size: 1rem;
    color: var(--muted);
}

.page-room .sponsor-bar {
    flex-shrink: 0;
    display: block;
    width: 100%;
    padding: 0.5rem 2rem;
    border-top: 2px solid var(--border);
    background: var(--surface);
}

.page-room .sponsor-bar__logos {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: center;
    justify-items: center;
    column-gap: 2.5rem;
    width: 100%;
    margin: 0;
    padding: 0;
}

.page-room .sponsor-bar__item {
    width: 100%;
    text-align: center;
}

.page-room .sponsor-bar__link {
    display: inline-block;
    line-height: 0;
}

.page-room .sponsor-bar__logos img {
    display: inline-block;
    max-height: 52px;
    max-width: 300px;
    width: auto;
    height: auto;
    object-fit: contain;
}

.page-room .site-footer {
    flex-shrink: 0;
    padding: 0.25rem 1.5rem 0.4rem;
    font-size: 0.8rem;
}

.page-room .site-footer--room {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}

.page-room .error-banner {
    margin: 1rem 0;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
}

/* --- Index / setup page --- */
body:not(.page-room) {
    min-height: 100vh;
    font-size: clamp(18px, 1.6vw, 28px);
}

.site-header {
    padding: 1.25rem 2rem;
    border-bottom: 2px solid var(--border);
    background: var(--surface);
}

.site-header--room {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-end;
    gap: 1rem;
}

.event-name {
    margin: 0 0 0.25rem;
    color: var(--muted);
    font-size: 0.85em;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

h1 {
    margin: 0;
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
}

.room-subtitle {
    margin: 0.35rem 0 0;
    color: var(--muted);
    font-size: 1.1em;
}

.site-header__meta {
    text-align: right;
}

.date-label {
    margin: 0 0 0.25rem;
    color: var(--muted);
    font-size: 0.95em;
}

.clock {
    margin: 0;
    font-size: clamp(1.5rem, 2.5vw, 2.25rem);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.room-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
    padding: 2rem;
    max-width: 1600px;
    margin: 0 auto;
}

.room-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 140px;
    padding: 1.5rem;
    border: 2px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    color: var(--text);
    transition: border-color 0.15s, transform 0.15s;
}

.room-card:hover,
.room-card:focus {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.room-card__label {
    font-size: 1.35em;
    font-weight: 700;
}

.room-card__subtitle {
    margin-top: 0.35rem;
    color: var(--muted);
    font-size: 0.95em;
}

.hero-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1rem;
    padding: 1.25rem 2rem 0;
}

.hero {
    padding: 1.25rem 1.5rem;
    border-radius: 12px;
    border: 2px solid var(--border);
    background: var(--surface);
}

.hero--now {
    border-color: var(--now);
}

.hero--next {
    border-color: var(--next);
}

.hero--empty {
    grid-column: 1 / -1;
}

.hero__label {
    margin: 0 0 0.5rem;
    font-size: 0.8em;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero--now .hero__label {
    color: var(--now);
}

.hero--next .hero__label {
    color: var(--next);
}

.hero__time {
    margin: 0 0 0.5rem;
    color: var(--muted);
    font-size: 0.95em;
    font-variant-numeric: tabular-nums;
}

.hero__session {
    margin: 0;
    font-size: clamp(1.4rem, 2.2vw, 2rem);
    line-height: 1.2;
}

.hero__field-label {
    display: block;
    margin-bottom: 0.15rem;
    color: var(--muted);
    font-size: 0.7em;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.hero__speaker {
    margin: 0.75rem 0 0;
    font-size: clamp(1.05rem, 1.6vw, 1.35rem);
    font-weight: 600;
}

.hero__description {
    margin: 0.65rem 0 0;
    color: var(--muted);
    font-size: 0.9em;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    overflow: hidden;
}

.sponsor-bar {
    display: block;
    width: 100%;
    padding: 0.75rem 2rem;
    border-top: 2px solid var(--border);
    background: var(--surface);
}

.sponsor-bar__logos {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: center;
    justify-items: center;
    column-gap: 2.5rem;
    width: 100%;
    margin: 0;
    padding: 0;
}

.sponsor-bar__item {
    width: 100%;
    text-align: center;
}

.sponsor-bar__link {
    display: inline-block;
    line-height: 0;
}

.sponsor-bar__logos img {
    display: inline-block;
    max-height: 56px;
    max-width: 280px;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: brightness(0.95);
}

.warn-banner {
    margin: 0;
    padding: 0.5rem 2rem;
    background: rgba(88, 166, 255, 0.12);
    border-bottom: 2px solid var(--accent);
    color: var(--accent);
    font-size: 0.85em;
    font-weight: 600;
    text-align: center;
}

.test-clock-banner {
    margin: 0;
    padding: 0.5rem 2rem;
    background: rgba(210, 153, 34, 0.2);
    border-bottom: 2px solid var(--next);
    color: var(--next);
    font-size: 0.85em;
    font-weight: 600;
    text-align: center;
}

.error-banner {
    margin: 2rem;
    padding: 1rem 1.25rem;
    border: 2px solid #f85149;
    border-radius: 8px;
    background: rgba(248, 81, 73, 0.12);
    font-size: 1.1em;
}

.site-footer {
    padding: 1rem 2rem 2rem;
    color: var(--muted);
    font-size: 0.85em;
}

.site-footer--room {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

/* Fine-tune for exactly 1080p landscape */
@media screen and (min-width: 1900px) and (min-height: 1000px) and (max-height: 1100px) {
    .page-room {
        font-size: 32px;
    }

    .page-room .hero-row {
        max-height: 400px;
    }

    .page-room h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 720px) {
    .page-room {
        font-size: 16px;
    }

    .page-room .hero-row {
        grid-template-columns: 1fr;
        max-height: none;
    }

    .page-room .session {
        grid-template-columns: 1fr;
        gap: 0.15rem;
        white-space: normal;
    }

    .page-room .session__body {
        white-space: normal;
    }

    .page-room .session__title,
    .page-room .session__speakers {
        white-space: normal;
        display: block;
    }

    .page-room .session__speakers::before {
        content: none;
    }

    .site-header--room .site-header__meta {
        text-align: left;
    }
}