/* ============================================
   MK-AIR
   A dark booth with one red lamp
   ============================================ */

:root {
    --air-pad: clamp(16px, 1.6vw, 40px);
    --air-gap: clamp(12px, 1.1vw, 28px);
    --fs-s: clamp(13px, .72vw, 18px);
    --fs-m: clamp(15px, .9vw, 22px);
    --fs-l: clamp(20px, 1.5vw, 36px);
    --fs-xl: clamp(24px, 2.2vw, 54px);
    --fs-clock: clamp(56px, 6.6vw, 168px);
    --glow: rgba(255, 90, 74, .5);
    --on-lamp: #0a0a0a;
}

.vh {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
}

/* === ONE SCREEN === */
/* header, booth and the wave fill the screen; the footer waits below the fold */
.screen {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh;
}

/* === HEADER === */
.header {
    padding: .75rem var(--air-pad);
    overflow: visible;
}

.brand {
    font-size: var(--fs-m);
}

.brand a:hover {
    color: var(--accent);
}

.header-btn {
    font-size: var(--fs-s);
}

.header-btn:hover,
.header-btn[aria-expanded="true"] {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--on-lamp);
}

.header-btn:focus-visible {
    outline: 2px solid var(--text-primary);
    outline-offset: 2px;
}

/* === KNOW HOW === */
.knowhow-panel {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: calc(100dvh - 100%);
    overflow-y: auto;
    padding: var(--air-pad);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--accent);
    box-shadow: 0 30px 60px rgba(0, 0, 0, .7);
    display: grid;
    grid-template-columns: minmax(0, 2fr) repeat(3, minmax(0, 1fr));
    gap: 1.5rem 2.5rem;
    font-size: var(--fs-s);
    line-height: 1.7;
    color: var(--text-primary);
}

.knowhow-panel[hidden] {
    display: none;
}

.knowhow-panel:focus {
    outline: none;
}

.knowhow-section h2 {
    margin-bottom: .6rem;
    font-size: var(--fs-s);
    font-weight: 500;
    letter-spacing: var(--letter-spacing-wider);
    color: var(--accent);
}

.knowhow-section p + p {
    margin-top: .4rem;
}

.knowhow-section em {
    font-style: normal;
    font-weight: 600;
    color: var(--accent);
}

.knowhow-section a {
    text-decoration: underline;
    text-underline-offset: .2em;
}

.nowrap {
    white-space: nowrap;
}

/* === MAIN === */
.air {
    position: relative;
    z-index: 2;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    padding: var(--air-pad);
    font-size: var(--fs-m);
}

/* === THE LAMP === */
/* lit: dark text on the red (6.4:1), never white on it (3.1:1). Only the glow breathes, never the text */
.lamp {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: none;
    padding: .45em 1em;
    border: 2px solid var(--border-secondary);
    border-radius: 6px;
    font-size: var(--fs-s);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: .12em;
    white-space: nowrap;
    color: var(--text-secondary);
    background: transparent;
    /* a lamp switches, it doesn't fade: halfway through, its text would sit on its own color */
    transition: box-shadow .6s ease;
}

.lamp[data-state="on"] {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--on-lamp);
    box-shadow: 0 0 18px var(--glow), 0 0 64px rgba(255, 90, 74, .22);
    animation: glow 2.6s ease-in-out infinite alternate;
}

.lamp[data-state="hold"] {
    border-color: var(--accent);
    color: var(--accent);
    animation: hold 1.4s steps(1) infinite;
}

@keyframes glow {
    from { box-shadow: 0 0 10px rgba(255, 90, 74, .32), 0 0 36px rgba(255, 90, 74, .1); }
    to { box-shadow: 0 0 22px rgba(255, 90, 74, .6), 0 0 84px rgba(255, 90, 74, .28); }
}

@keyframes hold {
    50% { border-color: var(--border-secondary); }
}

.lamp-big {
    font-size: clamp(18px, 1.4vw, 34px);
    padding: .5em 1.4em;
    border-radius: 8px;
}

/* === HOME: who's on, and going on air === */
.home {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--air-gap);
    width: min(100%, 1640px);
    margin: 0 auto;
}

.cols {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
    gap: var(--air-gap);
}

.home[hidden] {
    display: none;
}

.intro {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: .6rem 1.25rem;
    padding: calc(var(--air-gap) * .5) 0 calc(var(--air-gap) * .25);
}

.intro-line {
    font-size: var(--fs-xl);
    font-weight: 500;
    line-height: 1.15;
    letter-spacing: -.01em;
}

.panel {
    display: flex;
    flex-direction: column;
    min-height: 0;
    padding: var(--air-pad);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
}

.panel-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: var(--air-gap);
}

.panel-head h2 {
    font-size: var(--fs-s);
    font-weight: 500;
    letter-spacing: var(--letter-spacing-wider);
    color: var(--text-secondary);
}

.now-count {
    font-size: var(--fs-s);
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.now-list {
    list-style: none;
    max-height: max(168px, calc(100dvh - 560px));
    overflow-y: auto;
    border-top: 1px solid var(--border-primary);
}

.now-list:empty {
    border-top: 0;
}

.now-list li {
    border-bottom: 1px solid var(--border-primary);
}

.row {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto auto;
    align-items: center;
    gap: .5rem 1.25rem;
    padding: .95em .75em;
    color: var(--text-primary);
}

.row:hover,
.row:focus-visible {
    background: var(--hover-primary);
    color: var(--text-primary);
}

.row:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

.row-dot {
    width: .6em;
    height: .6em;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 10px var(--glow);
}

.row-name {
    font-size: var(--fs-l);
    font-weight: 600;
    line-height: 1.2;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.row-meta {
    font-size: var(--fs-s);
    color: var(--text-secondary);
    white-space: nowrap;
}

.row-time {
    min-width: 5ch;
    font-size: var(--fs-m);
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.now-empty {
    max-width: 34em;
    font-size: var(--fs-l);
    line-height: 1.45;
}

.now-empty a {
    text-decoration: underline;
    text-decoration-color: var(--accent);
    text-underline-offset: .2em;
}

.note {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: .75rem 1.25rem;
    margin-top: var(--air-gap);
}

.note-text:empty {
    display: none;
}

/* go on air */
.field-label {
    display: block;
    margin-bottom: .4rem;
    font-size: var(--fs-s);
    color: var(--text-secondary);
}

.field {
    width: 100%;
    padding: .8em 1em;
    font-family: inherit;
    font-size: max(16px, var(--fs-m));
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: 0;
}

.field::placeholder {
    color: var(--text-secondary);
    opacity: 1;
}

.field:focus {
    outline: 2px solid var(--accent);
    outline-offset: -1px;
}

.btn-air {
    width: 100%;
    margin-top: var(--air-gap);
    padding: 1em;
    font-family: inherit;
    font-size: var(--fs-m);
    font-weight: 600;
    letter-spacing: var(--letter-spacing-wide);
    color: var(--on-lamp);
    background: var(--accent);
    border: 2px solid var(--accent);
    cursor: pointer;
    transition: box-shadow .2s ease;
    -webkit-tap-highlight-color: transparent;
}

.btn-air:hover {
    box-shadow: 0 0 24px var(--glow);
}

.btn-air:focus-visible {
    outline: 2px solid var(--text-primary);
    outline-offset: 3px;
}

.btn-air[aria-busy="true"] {
    cursor: progress;
}

.go-meta {
    margin-top: .75rem;
    font-size: var(--fs-s);
    color: var(--text-secondary);
}

.go-status {
    margin-top: .75rem;
    font-size: var(--fs-m);
    min-height: 1.6em;
}

.btn-line {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: .55em 1.2em;
    font-family: inherit;
    font-size: var(--fs-s);
    font-weight: 500;
    letter-spacing: var(--letter-spacing-wide);
    color: var(--text-primary);
    background: transparent;
    border: 1px solid var(--border-secondary);
    cursor: pointer;
    text-decoration: none;
    transition: border-color .15s ease, background-color .15s ease;
}

.btn-line:hover {
    color: var(--text-primary);
    border-color: var(--accent);
}

.btn-line:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.btn-line[hidden] {
    display: none;
}

/* === THE BOOTH: one broadcast, from either side === */
.booth {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: calc(var(--air-gap) * .8);
    width: min(100%, 920px);
    margin: 0 auto;
    text-align: center;
}

.booth[hidden] {
    display: none;
}

.clock {
    font-size: var(--fs-clock);
    font-weight: 500;
    line-height: 1;
    letter-spacing: -.03em;
    font-variant-numeric: tabular-nums;
}

.clock[hidden] {
    display: none;
}

.booth-name {
    max-width: 100%;
    font-size: var(--fs-l);
    font-weight: 600;
    line-height: 1.25;
    overflow-wrap: anywhere;
}

.booth-name:empty {
    display: none;
}

.booth-meta {
    font-size: var(--fs-m);
    color: var(--text-secondary);
}

.booth-meta:empty {
    display: none;
}

.vu {
    display: block;
    width: min(100%, 560px);
    height: clamp(26px, 3vh, 52px);
}

.vu[hidden] {
    display: none;
}

.booth-status {
    min-height: 1.6em;
    font-size: var(--fs-m);
}

.booth-actions,
.after,
.share-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .75rem;
}

.booth-actions[hidden],
.after[hidden],
.share[hidden] {
    display: none;
}

.btn-play {
    width: auto;
    min-width: min(100%, 300px);
    margin-top: 0;
    padding: .85em 2.4em;
    font-size: clamp(18px, 1.3vw, 32px);
}

.btn-play[hidden] {
    display: none;
}

.share {
    width: 100%;
    padding: calc(var(--air-pad) * .8) var(--air-pad);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
}

.share-label {
    font-size: var(--fs-s);
    color: var(--text-secondary);
}

.share-url {
    margin: .35rem 0 .9rem;
    font-size: var(--fs-m);
    font-weight: 500;
    line-height: 1.45;
    overflow-wrap: anywhere;
    user-select: all;
    -webkit-user-select: all;
}

.btn-off.armed {
    color: var(--on-lamp);
    background: var(--accent);
    border-color: var(--accent);
}

/* === THE WAVE: what is on air right now, edge to edge === */
.wave {
    position: relative;
    z-index: 2;
    display: block;
    flex: none;
    width: 100%;
    height: clamp(56px, 10vh, 150px);
}

@media (prefers-reduced-motion: reduce) {
    .lamp,
    .lamp[data-state="on"],
    .lamp[data-state="hold"] {
        animation: none;
        transition: none;
    }
}

/* === SMALL SCREENS === */
@media (max-width: 860px) {
    .knowhow-panel {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .home {
        justify-content: flex-start;
    }

    .cols {
        grid-template-columns: minmax(0, 1fr);
    }

    .now-list {
        max-height: none;
    }

    .row {
        grid-template-columns: auto minmax(0, 1fr) auto;
        padding: .85em .5em;
    }

    .row-meta {
        grid-column: 2 / -1;
        grid-row: 2;
        white-space: normal;
    }

    .booth {
        justify-content: flex-start;
        padding-top: .5rem;
    }
}

@media (max-width: 480px) {
    .header {
        padding: .6rem 1rem;
    }

    .air {
        padding: 1rem;
    }

    .panel {
        padding: 1rem;
    }

    .intro {
        padding-top: 0;
    }
}

@media (pointer: coarse) {
    .header-btn {
        min-height: 40px;
    }

    .row {
        min-height: 56px;
    }
}