:root {
  --bg: #07080d;
  --bg-2: #0c0f18;
  --fg: #eef2f9;
  --fg-dim: #8b93a7;
  --accent: #6ee7ff;
  --accent-2: #a78bfa;
  --ok: #5eead4;
  --danger: #fb7185;
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

body {
  overflow: hidden;
  background:
    radial-gradient(120% 70% at 50% -10%, rgba(110, 231, 255, 0.13), transparent 60%),
    radial-gradient(90% 60% at 50% 110%, rgba(167, 139, 250, 0.12), transparent 60%),
    linear-gradient(180deg, var(--bg-2), var(--bg) 55%);
}

button { font: inherit; color: inherit; border: 0; background: none; padding: 0; cursor: pointer; }

.app {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  padding-top: var(--safe-t);
}

/* ---------------- top bar ---------------- */
.topbar {
  flex: 0 0 auto;
  height: 54px;
  padding: 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.brand-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px rgba(110, 231, 255, 0.8);
}

.top-acts { display: flex; gap: 6px; }

.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--fg-dim);
  transition: background 0.2s, color 0.2s;
}
.icon-btn:hover, .icon-btn:active { background: rgba(255, 255, 255, 0.06); color: var(--fg); }
.icon-btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

/* ---------------- stage ---------------- */
.stage {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.orb-area {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 20px 6px;
  transition: padding 0.35s ease;
}

.orb-wrap {
  --lvl: 0;
  position: relative;
  width: 176px;
  height: 176px;
  display: grid;
  place-items: center;
  transition: width 0.35s ease, height 0.35s ease;
}

.halo {
  position: absolute;
  inset: 6%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(110, 231, 255, 0.4), rgba(110, 231, 255, 0) 68%);
  filter: blur(18px);
  opacity: 0.55;
  transition: opacity 0.4s, transform 0.4s;
}

.ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(110, 231, 255, 0.16);
  opacity: 0;
  transform: scale(0.7);
  pointer-events: none;
}

.orb {
  position: relative;
  width: 132px;
  height: 132px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 34% 28%, rgba(255, 255, 255, 0.95), rgba(150, 240, 255, 0.55) 26%, rgba(88, 156, 255, 0.34) 55%, rgba(30, 34, 66, 0.9) 100%);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.12) inset,
    0 18px 60px rgba(56, 189, 248, 0.22),
    0 0 26px rgba(110, 231, 255, 0.22);
  transition: transform 0.12s linear, box-shadow 0.4s, filter 0.4s;
  animation: breathe 5s ease-in-out infinite;
}

.orb-sheen {
  position: absolute;
  inset: 8%;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 120%, rgba(167, 139, 250, 0.35), transparent 60%);
  pointer-events: none;
}

.orb-icon { width: 34px; height: 34px; fill: none; stroke: rgba(10, 16, 32, 0.72); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; opacity: 0.9; }

.bars {
  position: absolute;
  bottom: -26px;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 18px;
  opacity: 0;
  transition: opacity 0.3s;
}
.bars i {
  width: 4px;
  height: 5px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}
.bars i:nth-child(2) { height: 10px; }
.bars i:nth-child(3) { height: 14px; }
.bars i:nth-child(4) { height: 8px; }
.bars i:nth-child(5) { height: 6px; }

.status {
  margin: 18px 0 4px;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-align: center;
  min-height: 24px;
}
.hint {
  margin: 0;
  font-size: 12.5px;
  color: var(--fg-dim);
  text-align: center;
  min-height: 18px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 18px;
  max-width: 460px;
}
.chips button {
  padding: 8px 13px;
  border-radius: 999px;
  font-size: 13px;
  color: #d5dced;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.2s, border-color 0.2s;
}
.chips button:active { background: rgba(110, 231, 255, 0.12); border-color: rgba(110, 231, 255, 0.3); }

/* ---------------- chat ---------------- */
.chat::before { content: ""; margin-top: auto; }

.chat {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 6px 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scrollbar-width: none;
}
.chat::-webkit-scrollbar { display: none; }

.msg {
  max-width: 86%;
  padding: 10px 14px;
  border-radius: 18px;
  font-size: 15px;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  animation: rise 0.22s ease both;
}
.msg.user {
  align-self: flex-end;
  background: rgba(255, 255, 255, 0.085);
  border-bottom-right-radius: 6px;
}
.msg.user.pending { opacity: 0.6; }
.msg.bot {
  align-self: flex-start;
  background: rgba(110, 231, 255, 0.07);
  border: 1px solid rgba(110, 231, 255, 0.13);
  border-bottom-left-radius: 6px;
}
.msg.bot.err { background: rgba(251, 113, 133, 0.1); border-color: rgba(251, 113, 133, 0.28); color: #ffd7dd; }
.msg .caret {
  display: inline-block;
  width: 7px;
  height: 15px;
  margin-left: 2px;
  vertical-align: -2px;
  background: var(--accent);
  border-radius: 2px;
  animation: blink 1s steps(2, start) infinite;
}

/* orb shrinks once there is a conversation */
body.has-chat .orb-wrap { width: 104px; height: 104px; }
body.has-chat .orb { width: 80px; height: 80px; }
body.has-chat .orb-icon { width: 22px; height: 22px; }
body.has-chat .chips { display: none; }
body.has-chat .hint { display: none; }
body.has-chat .orb-area { padding-top: 2px; padding-bottom: 0; }
body.has-chat .status { margin-top: 10px; font-size: 14.5px; color: var(--fg-dim); }

/* ---------------- phases ---------------- */
body[data-phase="listening"] .orb {
  animation: none;
  transform: scale(calc(1 + var(--lvl) * 0.16));
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.18) inset,
    0 18px 70px rgba(56, 189, 248, 0.4),
    0 0 46px rgba(110, 231, 255, 0.4);
}
body[data-phase="listening"] .halo { opacity: 0.95; }
body[data-phase="listening"] .ring { animation: ripple 2.4s ease-out infinite; }
body[data-phase="listening"] .ring.r2 { animation-delay: 0.8s; }
body[data-phase="listening"] .bars { opacity: 1; }
body[data-phase="listening"] .bars i { animation: eq 0.9s ease-in-out infinite; }
body[data-phase="listening"] .bars i:nth-child(2) { animation-delay: 0.1s; }
body[data-phase="listening"] .bars i:nth-child(3) { animation-delay: 0.2s; }
body[data-phase="listening"] .bars i:nth-child(4) { animation-delay: 0.3s; }
body[data-phase="listening"] .bars i:nth-child(5) { animation-delay: 0.4s; }

body[data-phase="transcribing"] .orb,
body[data-phase="thinking"] .orb {
  animation: spinPulse 1.6s ease-in-out infinite;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12) inset, 0 18px 60px rgba(167, 139, 250, 0.35);
}
body[data-phase="thinking"] .halo { background: radial-gradient(circle, rgba(167, 139, 250, 0.45), transparent 68%); }

body[data-phase="speaking"] .orb {
  animation: speakPulse 1.1s ease-in-out infinite;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12) inset, 0 18px 60px rgba(94, 234, 212, 0.3);
}
body[data-phase="speaking"] .halo { background: radial-gradient(circle, rgba(94, 234, 212, 0.4), transparent 68%); opacity: 0.8; }

body[data-phase="error"] .orb { animation: none; filter: grayscale(0.4); }

@keyframes breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.03); }
}
@keyframes ripple {
  0% { opacity: 0.55; transform: scale(0.72); }
  100% { opacity: 0; transform: scale(1.22); }
}
@keyframes spinPulse {
  0%, 100% { transform: scale(1); filter: hue-rotate(0deg); }
  50% { transform: scale(1.05); filter: hue-rotate(24deg); }
}
@keyframes speakPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}
@keyframes eq {
  0%, 100% { transform: scaleY(0.5); }
  50% { transform: scaleY(1.5); }
}
@keyframes blink { 50% { opacity: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ---------------- composer ---------------- */
.composer {
  flex: 0 0 auto;
  padding: 8px 16px calc(10px + var(--safe-b));
}

.text-form {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 6px 6px 6px 16px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
}
.text-form:focus-within { border-color: rgba(110, 231, 255, 0.35); }

.text-form textarea {
  flex: 1;
  min-height: 34px;
  max-height: 120px;
  padding: 7px 0;
  border: 0;
  outline: none;
  resize: none;
  background: transparent;
  color: var(--fg);
  font-family: inherit;
  font-size: 16px;
  line-height: 1.4;
}
.text-form textarea::placeholder { color: #6d758a; }

.send-btn {
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), #7c9cff);
  color: #06121c;
  transition: transform 0.15s, opacity 0.2s;
}
.send-btn:active { transform: scale(0.92); }
.send-btn:disabled { opacity: 0.35; }
.send-btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }

.disclaimer {
  margin: 8px 0 0;
  text-align: center;
  font-size: 11px;
  color: #5f6678;
}

/* ---------------- sheet ---------------- */
.sheet-mask {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(2px);
  z-index: 20;
  animation: fade 0.2s ease;
}
.sheet {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 21;
  max-height: 82dvh;
  overflow-y: auto;
  padding: 16px 20px calc(22px + var(--safe-b));
  border-radius: 22px 22px 0 0;
  background: #10131d;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  animation: slideUp 0.24s ease;
}
.sheet-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.sheet-head strong { font-size: 16px; }
.sheet-body { display: flex; flex-direction: column; gap: 4px; }

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 14.5px;
}
.row > span { color: #d8deeb; }
.row em { font-style: normal; color: var(--fg-dim); margin-left: 4px; }
.row select {
  flex: 0 1 58%;
  min-width: 0;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--fg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 14px;
}
.row input[type="range"] { flex: 0 1 52%; accent-color: #6ee7ff; }
.switch-row input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: 46px;
  height: 27px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  position: relative;
  transition: background 0.2s;
  cursor: pointer;
}
.switch-row input[type="checkbox"]::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 21px;
  height: 21px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.2s;
}
.switch-row input[type="checkbox"]:checked { background: linear-gradient(135deg, #6ee7ff, #7c9cff); }
.switch-row input[type="checkbox"]:checked::after { transform: translateX(19px); }
.switch-row small { display: block; font-size: 11px; color: #7d8599; margin-top: 2px; }

.sheet-notes { margin: 14px 0 6px; font-size: 12px; color: #7d8599; line-height: 1.7; }
.sheet-notes p { margin: 0; }

.danger-btn {
  margin-top: 12px;
  padding: 12px;
  border-radius: 12px;
  color: var(--danger);
  background: rgba(251, 113, 133, 0.08);
  border: 1px solid rgba(251, 113, 133, 0.22);
  font-size: 14px;
}

/* ---------------- toast ---------------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(96px + var(--safe-b));
  transform: translate(-50%, 10px);
  max-width: 82vw;
  padding: 9px 16px;
  border-radius: 999px;
  background: rgba(20, 24, 36, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #e6ebf5;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 30;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@keyframes fade { from { opacity: 0; } }
@keyframes slideUp { from { transform: translateY(30px); opacity: 0.6; } }

@media (min-width: 640px) {
  .app { max-width: 560px; margin: 0 auto; }
  .sheet { left: 50%; right: auto; width: 520px; transform: translateX(-50%); border-radius: 22px; bottom: 24px; }
  @keyframes slideUp { from { transform: translate(-50%, 30px); opacity: 0.6; } }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; }
}