:root {
  --paper: #e9eef3;
  --card: #ffffff;
  --ink: #172238;
  --muted: #5b6780;
  --line: #cdd5df;
  --cobalt: #2b47f5;
  --cobalt-deep: #1d33c4;
  --signal: #ffc83d;
  --danger: #c8283d;
  --display: "Bricolage Grotesque", ui-sans-serif, system-ui, sans-serif;
  --body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.5 var(--body);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid var(--cobalt); outline-offset: 2px; }
[hidden] { display: none !important; }

.btn {
  border: 0;
  border-radius: 999px;
  padding: 0.8rem 1.4rem;
  background: var(--cobalt);
  color: #fff;
  font-weight: 650;
}
.btn:hover { background: var(--cobalt-deep); }
.btn:disabled { opacity: 0.55; cursor: default; }
.btn.quiet { background: transparent; color: var(--cobalt); padding-inline: 0.6rem; }
.btn.quiet:hover { background: rgba(43, 71, 245, 0.08); }
.field {
  width: 100%;
  border: 2px solid var(--line);
  border-radius: 14px;
  padding: 0.8rem 1rem;
  background: var(--card);
  font-size: 1.05rem;
}
.field:focus { border-color: var(--cobalt); outline: none; }
.error { color: var(--danger); font-size: 0.92rem; min-height: 1.4em; margin: 0.4rem 0 0; }

/* Landing ---------------------------------------------------------------- */
.landing {
  min-height: 100%;
  display: grid;
  grid-template-rows: 1fr auto;
  padding: calc(var(--safe-top) + 2rem) 1.4rem calc(var(--safe-bottom) + 1.5rem);
  max-width: 44rem;
  margin: 0 auto;
}
.hero { align-self: center; }
.link-art {
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 0.95;
  margin: 0 0 1.6rem;
  font-size: clamp(2.3rem, 10.5vw, 4.6rem);
  word-break: break-all;
}
.link-art .host { color: var(--muted); font-weight: 500; display: block; font-size: 0.52em; letter-spacing: -0.01em; margin-bottom: 0.25em; }
.link-art .code { color: var(--cobalt); }
.link-art .caret {
  display: inline-block;
  width: 0.08em;
  height: 0.82em;
  margin-left: 0.04em;
  background: var(--cobalt);
  vertical-align: -0.04em;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.lede { font-size: 1.12rem; color: var(--muted); max-width: 32rem; margin: 0 0 1.8rem; }
.create { display: flex; gap: 0.6rem; flex-wrap: wrap; max-width: 30rem; }
.create .field { flex: 1 1 14rem; }
.recent { margin-top: 2.6rem; }
.recent h2 { font: 650 1rem var(--body); margin: 0 0 0.6rem; }
.recent ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.recent a {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
  font-family: var(--display);
  font-weight: 650;
}
.recent a:hover { border-color: var(--cobalt); color: var(--cobalt); }
.foot { color: var(--muted); font-size: 0.85rem; }

/* Channel ---------------------------------------------------------------- */
.app { height: 100%; display: flex; flex-direction: column; }
.top {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: calc(var(--safe-top) + 0.6rem) 0.9rem 0.6rem;
  background: var(--ink);
  color: #fff;
}
.top .home { color: #b9c4dc; text-decoration: none; font-size: 1.4rem; line-height: 1; padding: 0.2rem 0.4rem; }
.top .title { flex: 1; min-width: 0; }
.top .slug { font: 800 1.25rem/1.1 var(--display); letter-spacing: -0.02em; }
.top .who { font-size: 0.8rem; color: #b9c4dc; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.icon-btn {
  width: 2.6rem; height: 2.6rem;
  border-radius: 50%;
  border: 0;
  display: grid; place-items: center;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}
.icon-btn:hover { background: rgba(255, 255, 255, 0.2); }
.icon-btn svg { width: 1.3rem; height: 1.3rem; }
.icon-btn.on { background: var(--signal); color: var(--ink); }

.call-banner {
  display: flex; align-items: center; gap: 0.8rem;
  padding: 0.6rem 0.9rem;
  background: var(--signal);
  color: var(--ink);
  font-weight: 600;
}
.call-banner span { flex: 1; }
.call-banner .btn { padding: 0.45rem 1rem; background: var(--ink); }

.feed {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0.8rem 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  overscroll-behavior: contain;
}
.empty { margin: auto; text-align: center; color: var(--muted); max-width: 20rem; }
.empty strong { display: block; color: var(--ink); font: 700 1.2rem var(--display); margin-bottom: 0.3rem; }
.day { align-self: center; font-size: 0.78rem; color: var(--muted); margin: 0.9rem 0 0.4rem; }
.msg { display: flex; flex-direction: column; align-items: flex-start; max-width: min(80%, 34rem); }
.msg .from { font-size: 0.78rem; color: var(--muted); margin: 0.55rem 0 0.15rem 0.7rem; font-weight: 600; }
.bubble {
  background: var(--card);
  border-radius: 1.15rem 1.15rem 1.15rem 0.35rem;
  padding: 0.5rem 0.85rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  box-shadow: 0 1px 0 var(--line);
}
.bubble a { color: inherit; }
.msg .time { font-size: 0.7rem; color: var(--muted); margin: 0.1rem 0.7rem 0; }
.msg.mine { align-self: flex-end; align-items: flex-end; }
.msg.mine .bubble { background: var(--cobalt); color: #fff; border-radius: 1.15rem 1.15rem 0.35rem 1.15rem; box-shadow: none; }
.msg.pending .bubble { opacity: 0.6; }
.msg.event { align-self: center; align-items: center; max-width: 100%; }
.msg.event .bubble { background: transparent; box-shadow: none; color: var(--muted); font-size: 0.88rem; padding: 0.3rem; }
.typing { font-size: 0.8rem; color: var(--muted); padding: 0 1.2rem; min-height: 1.3rem; }

.composer {
  display: flex; gap: 0.5rem; align-items: flex-end;
  padding: 0.5rem 0.7rem calc(var(--safe-bottom) + 0.6rem);
  background: var(--paper);
  border-top: 1px solid var(--line);
}
.composer textarea {
  flex: 1;
  resize: none;
  max-height: 9rem;
  border: 2px solid var(--line);
  border-radius: 1.3rem;
  padding: 0.55rem 0.95rem;
  background: var(--card);
  line-height: 1.4;
  font-size: 16px;
}
.composer textarea:focus { border-color: var(--cobalt); outline: none; }
.send {
  width: 2.75rem; height: 2.75rem; flex: none;
  border-radius: 50%; border: 0;
  background: var(--cobalt); color: #fff;
  display: grid; place-items: center;
}
.send svg { width: 1.25rem; height: 1.25rem; }
.send:disabled { opacity: 0.4; }

.nudge {
  display: flex; align-items: center; gap: 0.7rem;
  padding: 0.55rem 0.5rem 0.55rem 0.9rem;
  background: #dfe5fe; color: var(--ink); font-size: 0.92rem;
}
.nudge span { flex: 1; }
.nudge .btn { padding: 0.4rem 0.95rem; font-size: 0.9rem; }
.nudge-x { border: 0; background: none; font-size: 1.4rem; line-height: 1; color: var(--muted); padding: 0.2rem 0.5rem; }
.status-line { text-align: center; font-size: 0.8rem; padding: 0.3rem; background: #fde7ea; color: var(--danger); }

/* Sheets (password, name, settings) -------------------------------------- */
.sheet-wrap {
  position: fixed; inset: 0;
  background: rgba(23, 34, 56, 0.55);
  display: grid;
  align-items: end;
  z-index: 20;
}
.sheet {
  background: var(--paper);
  border-radius: 1.6rem 1.6rem 0 0;
  padding: 1.6rem 1.4rem calc(var(--safe-bottom) + 1.6rem);
  width: 100%;
  max-width: 30rem;
  margin: 0 auto;
}
.sheet h2 { font: 800 1.6rem/1.15 var(--display); letter-spacing: -0.02em; margin: 0 0 0.4rem; }
.sheet p { color: var(--muted); margin: 0 0 1rem; }
.sheet form { display: grid; gap: 0.7rem; }
.sheet .row { display: flex; gap: 0.5rem; justify-content: flex-end; flex-wrap: wrap; }
.sheet .setting {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.9rem 0; border-top: 1px solid var(--line);
}
.sheet .setting div { min-width: 0; }
.sheet .setting small { display: block; color: var(--muted); }
.share-link {
  display: flex; align-items: center; gap: 0.5rem;
  background: var(--card); border: 2px solid var(--line); border-radius: 14px;
  padding: 0.3rem 0.3rem 0.3rem 0.9rem;
  font-family: var(--display); font-weight: 650;
}
.share-link span { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
@media (min-width: 640px) {
  .sheet-wrap { align-items: center; }
  .sheet { border-radius: 1.6rem; }
}

/* Video call -------------------------------------------------------------- */
.call {
  position: fixed; inset: 0;
  background: #0d1424;
  z-index: 10;
  display: flex; flex-direction: column;
  padding: calc(var(--safe-top) + 0.6rem) 0.6rem calc(var(--safe-bottom) + 0.8rem);
}
.tiles {
  flex: 1;
  display: grid;
  gap: 0.5rem;
  grid-template-columns: repeat(var(--cols, 1), 1fr);
  grid-auto-rows: 1fr;
  min-height: 0;
}
.tile { position: relative; background: #1d2740; border-radius: 1.1rem; overflow: hidden; min-height: 0; }
.tile video { width: 100%; height: 100%; object-fit: cover; display: block; }
.tile.self video { transform: scaleX(-1); }
.tile.self.rear video { transform: none; }
.tile .label {
  position: absolute; left: 0.6rem; bottom: 0.6rem;
  background: rgba(13, 20, 36, 0.7); color: #fff;
  font-size: 0.8rem; font-weight: 600;
  padding: 0.2rem 0.6rem; border-radius: 999px;
}
.tile.alone {
  position: absolute; right: 1rem; top: calc(var(--safe-top) + 1rem);
  width: 28vw; max-width: 9rem; aspect-ratio: 3 / 4; z-index: 2;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
}
.waiting { color: #b9c4dc; display: grid; place-items: center; text-align: center; font-size: 1.05rem; padding: 2rem; }
.controls { display: flex; justify-content: center; gap: 0.9rem; padding-top: 0.8rem; }
.controls .icon-btn { width: 3.4rem; height: 3.4rem; }
.controls .icon-btn.off { background: #fff; color: var(--ink); }
.controls .hang { background: var(--danger); }
.controls .hang:hover { background: #a91f32; }

@media (prefers-reduced-motion: reduce) {
  .link-art .caret { animation: none; }
}