:root {
  --bg: #08090c;
  --bg-soft: #101218;
  --ink: #f2f2f4;
  --muted: #8b8f9a;
  --accent: #ff8a3d;
  --accent-soft: #ffb37a;
  --ok: #4ade80;
  --bad: #f87171;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  height: 100%;
  background: radial-gradient(120% 80% at 50% 0%, #14161d 0%, var(--bg) 58%);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Inter, system-ui, sans-serif;
  overflow: hidden;
  overscroll-behavior: none;
}

body { display: flex; flex-direction: column; padding: var(--safe-top) 20px var(--safe-bottom); }

header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 2px 0; font-size: 15px;
}

.brand { letter-spacing: .32em; text-transform: lowercase; color: var(--muted); font-size: 12px; }

.header-right { display: flex; align-items: center; gap: 10px; }

.ghost {
  background: none; border: 1px solid #23262f; color: var(--muted);
  border-radius: 999px; padding: 6px 14px; font-size: 13px; font-family: inherit;
}
.ghost:active { background: #16181f; }
.ghost.wide { width: 100%; margin-top: 6px; }

.dot { width: 7px; height: 7px; border-radius: 50%; background: #3a3f4b; transition: background .3s; }
.dot.live { background: var(--ok); box-shadow: 0 0 10px rgba(74, 222, 128, .6); }
.dot.busy { background: var(--accent); }
.dot.down { background: var(--bad); }

main { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0; }

.stage { position: relative; width: 260px; height: 260px; display: grid; place-items: center; }

.halo {
  position: absolute; inset: 0; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 138, 61, .16) 0%, rgba(255, 138, 61, 0) 68%);
  opacity: 0; transform: scale(.85); transition: opacity .35s, transform .35s;
}
body.is-listen .halo { opacity: 1; transform: scale(1); animation: breathe 3.4s ease-in-out infinite; }
body.is-think .halo { opacity: 1; transform: scale(.95); background: radial-gradient(circle, rgba(255,179,122,.12) 0%, rgba(255,179,122,0) 66%); }
body.is-speak .halo { opacity: 1; transform: scale(1.02); background: radial-gradient(circle, rgba(255,138,61,.22) 0%, rgba(255,138,61,0) 70%); animation: breathe 2.2s ease-in-out infinite; }

@keyframes breathe {
  0%, 100% { transform: scale(.92); opacity: .75; }
  50% { transform: scale(1.04); opacity: 1; }
}

.mic {
  position: relative; z-index: 2;
  width: 148px; height: 148px; border-radius: 50%;
  border: 1px solid #2a2e39;
  background: linear-gradient(180deg, #1a1d25 0%, #101218 100%);
  color: var(--ink); display: grid; place-items: center;
  transition: transform .18s ease, border-color .3s, box-shadow .3s, background .3s;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .55), inset 0 1px 0 rgba(255, 255, 255, .04);
}
.mic:active { transform: scale(.96); }
.mic svg { width: 58px; height: 58px; fill: none; stroke: var(--ink); stroke-width: 1.7; stroke-linecap: round; }
.mic svg rect { fill: var(--ink); stroke: none; }
.ico-bars { opacity: 0; transition: opacity .25s; }

body.is-listen .mic { border-color: rgba(255, 138, 61, .55); box-shadow: 0 0 0 8px rgba(255, 138, 61, .05), 0 18px 50px rgba(0, 0, 0, .55); }
body.is-listen .ico-mic { opacity: .35; transition: opacity .25s; }
body.is-listen .ico-bars { opacity: 1; }
body.is-speak .mic { border-color: rgba(255, 138, 61, .8); background: linear-gradient(180deg, #2a1a10 0%, #14100d 100%); }
body.is-speak .ico-mic { opacity: 0; }
body.is-speak .ico-bars { opacity: 1; }
body.is-speak .mic svg rect { animation: bars .9s ease-in-out infinite; transform-origin: center; }
body.is-speak .mic svg rect:nth-child(2) { animation-delay: .12s; }
body.is-speak .mic svg rect:nth-child(3) { animation-delay: .24s; }
body.is-speak .mic svg rect:nth-child(4) { animation-delay: .36s; }

@keyframes bars { 0%, 100% { transform: scaleY(.45); } 50% { transform: scaleY(1); } }

body.is-think .mic { border-color: #2f3441; }
body.is-think .ico-mic { opacity: .3; }
body.is-think .ico-bars { opacity: 1; animation: fade 1.4s ease-in-out infinite; }
@keyframes fade { 0%, 100% { opacity: .25; } 50% { opacity: .9; } }

.status { margin: 26px 0 0; font-size: 17px; letter-spacing: .01em; color: var(--ink); }
.caption { margin: 10px 0 0; font-size: 14px; color: var(--muted); text-align: center; max-width: 320px; min-height: 20px; line-height: 1.4; }
.hint { position: absolute; bottom: calc(24px + var(--safe-bottom)); margin: 0; font-size: 12.5px; color: #5b616e; text-align: center; max-width: 300px; transition: opacity .5s; }
body.is-listen .hint, body.is-speak .hint, body.is-think .hint { opacity: 0; }

.panel {
  position: fixed; left: 16px; right: 16px; bottom: calc(16px + var(--safe-bottom));
  background: rgba(20, 22, 29, .96); border: 1px solid #23262f; border-radius: 20px;
  padding: 18px; backdrop-filter: blur(18px); z-index: 20;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .6);
}
.panel .row { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 8px 0; }
.panel label { color: var(--muted); font-size: 14px; }
.panel select, .panel input[type="range"] { flex: 1; max-width: 190px; }
.panel select {
  background: #0d0f14; color: var(--ink); border: 1px solid #23262f;
  border-radius: 10px; padding: 8px 10px; font-size: 14px; font-family: inherit;
}
.panel input[type="checkbox"] { width: 22px; height: 22px; accent-color: var(--accent); }
.panel input[type="range"] { accent-color: var(--accent); }

.error { color: var(--bad); font-size: 14px; }
.muted { color: var(--muted); }

/* login */
.login-body { display: grid; place-items: center; padding: 24px; }
.login { width: 100%; max-width: 320px; text-align: center; }
.login h1 { font-weight: 300; font-size: 34px; letter-spacing: .3em; margin: 0 0 6px; }
.login p { margin: 0 0 26px; font-size: 14px; }
.login input {
  width: 100%; background: #0d0f14; border: 1px solid #23262f; color: var(--ink);
  border-radius: 12px; padding: 14px 16px; font-size: 16px; font-family: inherit; margin-bottom: 12px;
}
.login button {
  width: 100%; background: var(--accent); color: #1a0d03; border: 0; border-radius: 12px;
  padding: 14px 16px; font-size: 16px; font-weight: 600; font-family: inherit;
}