*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  font-family: var(--font);
  font-size: var(--fs-body);
  color: var(--c-on-surface);
  background: var(--c-surface);
  overflow-x: hidden;
  transition: background .4s, color .4s;
}
button, input { font: inherit; color: inherit; }
.ms {
  font-family: "Material Symbols Rounded";
  font-weight: normal; font-style: normal; font-size: 24px; line-height: 1;
  letter-spacing: normal; text-transform: none; white-space: nowrap;
  font-variation-settings: "FILL" 1, "wght" 500;
  user-select: none;
}

/* Background blob */
.blob {
  position: fixed; z-index: -1; width: 60vmax; height: 60vmax; right: -20vmax; top: -20vmax;
  background: linear-gradient(135deg, var(--c-primary-container), var(--c-tertiary-container));
  opacity: .8; filter: blur(8px);
  animation: morph 14s ease-in-out infinite alternate;
}
@keyframes morph {
  0%   { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; transform: rotate(0deg) scale(1); }
  50%  { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; transform: rotate(60deg) scale(1.08); }
  100% { border-radius: 50% 50% 40% 60% / 40% 70% 30% 60%; transform: rotate(120deg) scale(.96); }
}

.topbar {
  position: fixed; inset: 0 0 auto 0; z-index: 20; display: flex; justify-content: space-between;
  align-items: center; padding: 12px 18px;
}
.brand { display: flex; gap: 8px; align-items: center; font-weight: 800; font-size: 1.2rem; color: var(--c-primary); }

main { min-height: 100%; }
.screen {
  min-height: 100dvh; display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 22px; padding: 84px 18px 56px; text-align: center;
  animation: enter var(--t-slow) var(--spring-slow);
}
@keyframes enter { from { opacity: 0; transform: translateY(24px) scale(.97); } to { opacity: 1; transform: none; } }

.display { font-size: var(--fs-display); font-weight: 900; margin: 0; letter-spacing: -.04em; line-height: .95;
  font-variation-settings: "opsz" 144; }
.accent { color: var(--c-primary); }
.headline { font-size: var(--fs-headline); font-weight: 800; margin: 0; }
.lead { max-width: 34ch; color: var(--c-on-surface-var); font-size: 1.15rem; margin: 0; }
.row { display: flex; }
.row.center { justify-content: center; }
.row.gap, .gap { gap: 10px; }
.row.wrap { flex-wrap: wrap; justify-content: center; }
.label { font-size: var(--fs-label); letter-spacing: .08em; text-transform: uppercase; color: var(--c-on-surface-var); }

/* Buttons */
.btn, .icon-btn {
  position: relative; overflow: hidden; border: 0; cursor: pointer; display: inline-flex;
  align-items: center; justify-content: center; gap: 8px; font-weight: 600;
  transition: transform var(--t-fast) var(--spring-fast), border-radius var(--t-fast) var(--spring-fast),
              background .25s, box-shadow .25s;
  -webkit-tap-highlight-color: transparent;
}
.btn { height: 48px; padding: 0 24px; border-radius: var(--r-full); background: var(--c-surface-2); }
.btn.big { height: 60px; padding: 0 34px; font-size: 1.1rem; }
.btn.filled { background: var(--c-primary); color: var(--c-on-primary); box-shadow: var(--elev-2); }
.btn.tonal { background: var(--c-secondary-container); color: var(--c-on-primary-container); }
.btn.outlined { background: transparent; box-shadow: inset 0 0 0 1.5px var(--c-outline); }
.btn.danger { background: var(--c-error); color: var(--c-on-error); padding: 0 28px; }
.btn:hover, .icon-btn:hover { box-shadow: var(--elev-2); }
.btn:active { transform: scale(.94); border-radius: var(--r-md); }
.btn:focus-visible, .icon-btn:focus-visible, input:focus-visible { outline: 3px solid var(--c-primary); outline-offset: 2px; }

.icon-btn { width: 52px; height: 52px; border-radius: 50%; background: var(--c-surface-2); color: var(--c-on-surface); }
.icon-btn.tonal { background: var(--c-secondary-container); color: var(--c-on-primary-container); }
.icon-btn.filled { background: var(--c-primary); color: var(--c-on-primary); }
.icon-btn.off { background: var(--c-error); color: var(--c-on-error); border-radius: var(--r-md); }
.icon-btn.active { background: var(--c-primary); color: var(--c-on-primary); border-radius: var(--r-md); }
.icon-btn:active { transform: scale(.86); border-radius: var(--r-md); }
.btn-group { display: flex; gap: 6px; }
.btn-group .icon-btn:active + .icon-btn,
.btn-group .icon-btn:has(+ .icon-btn:active) { transform: scale(1.1); }

.ripple::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0;
  background: radial-gradient(circle at var(--rx, 50%) var(--ry, 50%), currentColor 0, transparent 60%);
  transition: opacity .5s;
}
.ripple.rip::after { opacity: .22; transition: none; }

.dot { position: absolute; top: 10px; right: 10px; width: 10px; height: 10px; border-radius: 50%; background: var(--c-error); }

/* Cards, fields, chips */
.card { background: var(--c-surface-1); border-radius: var(--r-lg); padding: 22px; box-shadow: var(--elev-1); }
.join-card { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; justify-content: center; }
.field { display: flex; flex-direction: column; gap: 6px; text-align: left; font-size: var(--fs-label); color: var(--c-on-surface-var); }
.field input, .composer input {
  height: 48px; border-radius: var(--r-full); border: 1.5px solid var(--c-outline); background: var(--c-surface);
  padding: 0 20px; font-size: 1rem; min-width: 220px; transition: border-color .2s;
}
.field input:focus, .composer input:focus { border-color: var(--c-primary); }
.chip {
  display: inline-flex; gap: 6px; align-items: center; height: 34px; padding: 0 14px;
  border-radius: var(--r-sm); background: var(--c-secondary-container); color: var(--c-on-primary-container);
  font-size: var(--fs-label); font-weight: 600;
}
.chip .ms { font-size: 18px; }
.chip.ok { background: var(--c-primary); color: var(--c-on-primary); }
.chip.bad { background: var(--c-error); color: var(--c-on-error); }
.glass {
  background: color-mix(in srgb, var(--c-surface) 62%, transparent);
  -webkit-backdrop-filter: blur(18px) saturate(1.4); backdrop-filter: blur(18px) saturate(1.4);
  color: var(--c-on-surface);
}
.swatches { display: flex; gap: 10px; }
.swatch { width: 34px; height: 34px; border-radius: 50%; border: 3px solid var(--c-surface); cursor: pointer;
  box-shadow: var(--elev-1); transition: transform var(--t-fast) var(--spring-fast), border-radius var(--t-fast); }
.swatch:hover { transform: scale(1.18); border-radius: 12px; }
.swatch.sel { border-color: var(--c-on-surface); }

/* Lobby */
.lobby-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; width: min(920px, 100%); }
.preview { display: flex; flex-direction: column; gap: 14px; }
.preview video { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: var(--r-md); background: #000; transform: scaleX(-1); }
.meter { height: 8px; border-radius: var(--r-full); background: var(--c-surface-2); overflow: hidden; }
.meter > div { height: 100%; width: 0; background: var(--c-primary); transition: width .08s; }
.code-card { display: flex; flex-direction: column; gap: 16px; align-items: center; justify-content: center; }
.code { font-size: clamp(1.8rem, 6vw, 2.8rem); font-weight: 900; letter-spacing: .08em; font-family: ui-monospace, Menlo, Consolas, monospace;
  color: var(--c-primary); word-break: break-all; }

/* Call */
.call { padding: 0; gap: 0; justify-content: flex-start; align-items: stretch; }
.stage { position: relative; flex: 1; margin: 72px 12px 100px; border-radius: var(--r-xl); overflow: hidden; background: #0b0b0f; box-shadow: var(--elev-3); }
#remoteVideo { width: 100%; height: 100%; object-fit: cover; display: block; }
.waiting { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; color: #fff; }
.loader { width: 64px; height: 64px; background: var(--c-primary); animation: loader 1.8s var(--spring-slow) infinite; }
@keyframes loader {
  0% { border-radius: 50%; transform: rotate(0); }
  33% { border-radius: 30%; transform: rotate(120deg) scale(.9); }
  66% { border-radius: 12%; transform: rotate(240deg) scale(1.1); }
  100% { border-radius: 50%; transform: rotate(360deg); }
}
.tile.local {
  position: absolute; right: 16px; bottom: 16px; width: clamp(110px, 24vw, 220px); aspect-ratio: 3/4;
  border-radius: var(--r-lg); overflow: hidden; background: #000; box-shadow: var(--elev-3), 0 0 0 calc(var(--level, 0) * 6px) var(--c-primary);
  touch-action: none; cursor: grab; transition: box-shadow .1s;
}
.tile.local video { width: 100%; height: 100%; object-fit: cover; transform: scaleX(-1); }
.tile.local.screen video { transform: none; object-fit: contain; }
.stage.speaking { box-shadow: var(--elev-3), 0 0 0 4px var(--c-primary); }
.status-row { position: absolute; top: 14px; left: 14px; display: flex; gap: 8px; }
.toolbar {
  position: fixed; left: 50%; bottom: max(16px, env(safe-area-inset-bottom)); transform: translateX(-50%);
  display: flex; gap: 14px; align-items: center; padding: 10px 14px; border-radius: var(--r-full); box-shadow: var(--elev-3); z-index: 30;
  animation: enter var(--t-slow) var(--spring-slow);
}

/* Chat sheet */
.sheet {
  position: fixed; z-index: 40; background: var(--c-surface-1); box-shadow: var(--elev-3); display: flex; flex-direction: column;
  right: 12px; top: 72px; bottom: 100px; width: min(380px, calc(100% - 24px)); border-radius: var(--r-xl);
  animation: slide var(--t-slow) var(--spring-slow);
}
@keyframes slide { from { transform: translateY(40px) scale(.96); opacity: 0; } to { transform: none; opacity: 1; } }
.sheet-head { display: flex; justify-content: space-between; align-items: center; padding: 14px 14px 6px 22px; }
.sheet-head h3 { margin: 0; font-size: var(--fs-title); }
.messages { flex: 1; overflow-y: auto; padding: 8px 16px; display: flex; flex-direction: column; gap: 4px; }
.msg { max-width: 82%; padding: 10px 14px; border-radius: 20px; word-wrap: break-word; text-align: left; animation: enter var(--t-fast) var(--spring-fast); }
.msg.me { align-self: flex-end; background: var(--c-primary-container); color: var(--c-on-primary-container); border-bottom-right-radius: 6px; }
.msg.them { align-self: flex-start; background: var(--c-surface-2); border-bottom-left-radius: 6px; }
.composer { display: flex; gap: 8px; padding: 12px; }
.composer input { flex: 1; min-width: 0; }

.snackbar {
  position: fixed; left: 50%; bottom: 110px; transform: translate(-50%, 30px); opacity: 0; pointer-events: none; z-index: 60;
  background: var(--c-on-surface); color: var(--c-surface); padding: 14px 22px; border-radius: var(--r-md); box-shadow: var(--elev-3);
  transition: transform var(--t-fast) var(--spring-fast), opacity .2s;
}
.snackbar.show { transform: translate(-50%, 0); opacity: 1; }
.foot { position: fixed; bottom: 4px; left: 12px; font-size: 11px; color: var(--c-on-surface-var); opacity: .7; z-index: 5; }

@media (max-width: 640px) {
  .sheet { right: 0; left: 0; width: 100%; bottom: 0; top: auto; height: 62dvh; border-radius: var(--r-xl) var(--r-xl) 0 0; }
  .stage { margin: 64px 8px 96px; border-radius: var(--r-lg); }
  .toolbar { gap: 8px; padding: 8px 10px; }
  .btn.danger span:not(.ms) { display: none; }
}