/* Tablet-first controller; same palette as the idle screen */
:root {
  --bg: #f3f6f5;
  --surface: #ffffff;
  --fg: #142019;
  --muted: #5d6b66;
  --line: #d6dfdb;
  --accent: #1f8a6a;
  --on-accent: #ffffff;
  --danger: #b3261e;
  --font: system-ui, "Noto Sans", "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101413;
    --surface: #18201e;
    --fg: #eef2ef;
    --muted: #8c9a95;
    --line: #26302d;
    --accent: #7fd3b5;
    --on-accent: #0b1210;
    --danger: #f2b8b5;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body { background: var(--bg); color: var(--fg); font-family: var(--font); font-size: 17px; line-height: 1.5; }
[hidden] { display: none !important; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.muted { color: var(--muted); }

.bar { display: flex; align-items: center; gap: 12px; padding: calc(12px + env(safe-area-inset-top, 0px)) 20px 12px; border-bottom: 1px solid var(--line); }
.brand { font-size: 1.5rem; font-weight: 700; letter-spacing: .02em; }
.brand span, .heart { color: var(--accent); }
.spacer { flex: 1; }
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: .85rem; padding: 3px 10px; border: 1px solid var(--line); border-radius: 999px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

main { max-width: 960px; margin: 0 auto; padding: 32px 20px; }
button { font: inherit; color: inherit; cursor: pointer; border-radius: 10px; min-height: 44px; padding: 8px 16px; }
button:focus-visible, input:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.primary { background: var(--accent); color: var(--on-accent); border: 0; font-weight: 600; }
.ghost { background: none; border: 1px solid var(--line); }
.ghost[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }

.pair { max-width: 440px; margin: 8vh auto 0; display: grid; gap: 12px; text-align: center; }
.pair h1 { margin: 0; font-size: 1.8rem; text-wrap: balance; }
.pair p { margin: 0; }
#pair-form { display: grid; gap: 12px; margin-top: 12px; }
#code { font: inherit; font-size: 2.4rem; font-weight: 700; letter-spacing: .15em; text-align: center; font-variant-numeric: tabular-nums;
        padding: 12px; border: 2px solid var(--line); border-radius: 12px; background: var(--surface); color: var(--fg); width: 100%; }
.error { color: var(--danger); }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; margin-bottom: 32px; }
.tile { display: grid; gap: 6px; text-align: left; align-content: start; min-height: 160px; padding: 20px; background: var(--surface); border: 1px solid var(--line); }
.tile:disabled { cursor: default; }
a.tile { color: inherit; text-decoration: none; border-radius: 10px; }
a.tile:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.tile-title { font-size: 1.3rem; font-weight: 600; }
.soon { justify-self: start; margin-top: auto; font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 2px 8px; }

dialog { border: 1px solid var(--line); border-radius: 14px; background: var(--surface); color: var(--fg); padding: 24px; width: min(420px, calc(100vw - 32px)); }
dialog::backdrop { background: rgb(0 0 0 / .5); }
dialog h2 { margin: 0; }
dialog h3 { margin: 16px 0 4px; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.credits { margin: 0 0 16px; padding: 0; list-style: none; display: grid; gap: 2px; }
.credits li { display: flex; justify-content: space-between; gap: 12px; }
.made { display: inline-flex; align-items: center; gap: 5px; font-size: .8rem; padding: 3px 10px; border: 1px solid var(--line); border-radius: 999px; }
.heart { width: 13px; height: 13px; fill: currentColor; }
dialog form { margin-top: 20px; text-align: right; }
dialog.wide { width: min(680px, calc(100vw - 32px)); }
.board-pick { max-width: 100%; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; }
.board-new { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0; }
.board-new input, .board-rename { flex: 1; min-width: 0; font: inherit; color: inherit; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; min-height: 44px; width: 100%; box-sizing: border-box; }
.boards { max-height: 55vh; overflow-y: auto; }
.docs.boards li { grid-template-columns: 1fr auto auto auto; }
@media (max-width: 560px) { .docs.boards li { grid-template-columns: 1fr 1fr 1fr; } .docs.boards li > div { grid-column: 1 / -1; } .docs.boards li .del { grid-column: auto; } }
.add-body { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; margin-top: 16px; }
.add-qr { width: 180px; height: 180px; background: #fff; border-radius: 8px; overflow: hidden; flex: none; }
.add-qr img { display: block; width: 100%; height: 100%; image-rendering: pixelated; }
.add-steps { margin: 0; padding-left: 20px; display: grid; gap: 6px; min-width: 0; overflow-wrap: anywhere; }
.add-code { font-size: 2rem; font-weight: 700; letter-spacing: .1em; font-variant-numeric: tabular-nums; color: var(--accent); }
.add-done { color: var(--accent); font-weight: 600; margin: 8px 0 0; }

/* views */
.view-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }
.view-head h1 { margin: 0; font-size: 1.5rem; min-width: 0; overflow-wrap: anywhere; }
.button { display: inline-flex; align-items: center; border-radius: 10px; min-height: 44px; padding: 8px 16px; cursor: pointer; }
label.button:focus-within { outline: 3px solid var(--accent); outline-offset: 2px; }
.danger { color: var(--danger); }
.empty { text-align: center; padding: 48px 0; }

.now { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 14px 18px; margin-bottom: 20px; background: var(--surface); border: 1px solid var(--accent); border-radius: 12px; }

.progress { position: relative; height: 32px; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; margin-bottom: 16px; background: var(--surface); }
.progress-bar { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--accent); opacity: .35; transition: width .2s; }
.progress span { position: relative; display: block; padding: 4px 12px; font-size: .9rem; }

.docs { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.docs li { display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 12px; padding: 12px 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; }
.docs li.on { border-color: var(--accent); }
.doc-name { font-weight: 600; overflow-wrap: anywhere; min-width: 0; }
.doc-meta { font-size: .85rem; color: var(--muted); font-variant-numeric: tabular-nums; }

/* --aspect: projector width/height, set from the player; the preview shows exactly what it shows */
.preview { --aspect: 1.7778; position: relative; display: grid; place-items: center; background: #000; border-radius: 12px; overflow: hidden; margin: 0 auto;
  height: min(calc((100vw - 40px) / var(--aspect)), calc(100dvh - 410px)); min-height: 200px; aspect-ratio: var(--aspect); max-width: 100%; touch-action: none; user-select: none; }
.preview canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.preview p { position: absolute; }
.zoombar { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.zoombar #zoom-out, .zoombar #zoom-in { min-width: 52px; font-size: 1.3rem; }
.zoom-no { min-width: 5ch; text-align: center; font-variant-numeric: tabular-nums; }
.pager { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 16px; margin: 16px 0; }
.big { font-size: 2.4rem; line-height: 1; min-height: 88px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; }
.big:active { background: var(--line); }
.page-no { font-size: 1.4rem; font-weight: 600; font-variant-numeric: tabular-nums; min-width: 6ch; text-align: center; }
.vplayer { display: grid; gap: 12px; padding: 16px; margin-bottom: 20px; background: var(--surface); border: 1px solid var(--accent); border-radius: 12px; }
.vplayer-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; min-width: 0; }
.vplayer-head strong { overflow-wrap: anywhere; min-width: 0; }
.warn { font-size: .85rem; padding: 2px 10px; border-radius: 999px; border: 1px solid var(--danger); color: var(--danger); }
#vp-seek { width: 100%; accent-color: var(--accent); min-height: 32px; }
.vp-times { display: flex; justify-content: space-between; font-variant-numeric: tabular-nums; color: var(--muted); font-size: .9rem; margin-top: -8px; }
.vp-buttons { display: grid; grid-template-columns: 1fr 2fr 1fr; gap: 12px; }
.vp-buttons .big { font-size: 1.6rem; min-height: 72px; }
.vp-play.primary { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.vp-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.vp-vol { display: flex; align-items: center; gap: 10px; flex: 1; min-width: 200px; max-width: 360px; }
.vp-vol input { flex: 1; accent-color: var(--accent); }
.small { font-size: .85rem; }
.present-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
@media (max-width: 500px) { .docs li { grid-template-columns: 1fr auto; } .docs li .del { grid-column: 2; } }

/* whiteboard: full width, board fills the rest of the screen */
body.full { height: 100dvh; display: flex; flex-direction: column; overflow: hidden; overscroll-behavior: none; }
body.full main { flex: 1; min-height: 0; width: 100%; max-width: none; padding: 12px 12px 0; display: flex; flex-direction: column; }
.wb { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.wb .view-head { margin-bottom: 12px; }
.wb-board { position: relative; flex: 1; min-height: 0; border: 1px solid var(--line); border-radius: 12px 12px 0 0; overflow: hidden; background: #fff; }
.home-foot { display: flex; gap: 12px; flex-wrap: wrap; }
a.button { color: inherit; text-decoration: none; }

/* whiteboard full screen: board only, floating exit button */
.wb-exit { display: none; }
body.wb-full .bar, body.wb-full .wb .view-head { display: none; }
body.wb-full main { padding: 0; }
body.wb-full .wb-board { border: 0; border-radius: 0; }
body.wb-full .wb-exit { display: block; position: fixed; left: 50%; bottom: calc(16px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); z-index: 10;
  min-height: 40px; padding: 6px 16px; border: 1px solid #d6dfdb; border-radius: 999px; background: rgb(255 255 255 / .92); color: #142019; font-size: .9rem; box-shadow: 0 2px 8px rgb(0 0 0 / .12); }