/* =========================================================
   Loostone Voice — Nothing Design System
   Fonts: Space Grotesk + Space Mono + Doto (hero only)
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Doto:wght@400;700&family=Space+Grotesk:wght@300;400;500;700&family=Space+Mono:wght@400;700&display=swap');

:root {
  color-scheme: dark;

  /* --- Color tokens --- */
  --black: #000000;
  --surface: #111111;
  --surface-raised: #1A1A1A;
  --border: #222222;
  --border-visible: #333333;
  --text-disabled: #666666;
  --text-secondary: #999999;
  --text-primary: #E8E8E8;
  --text-display: #FFFFFF;
  --accent: #D71921;
  --accent-subtle: rgba(215, 25, 33, 0.15);
  --success: #4A9E5C;
  --warning: #D4A843;
  --interactive: #5B9BF6;

  /* --- Typography --- */
  --font-body: 'Space Grotesk', 'DM Sans', system-ui, sans-serif;
  --font-mono: 'Space Mono', 'JetBrains Mono', 'SF Mono', monospace;
  --font-display: 'Doto', 'Space Mono', monospace;

  /* --- Spacing (8px base) --- */
  --space-2xs: 2px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
}

/* --- Light mode tokens --- */
.theme-light {
  --black: #F5F5F5;
  --surface: #FFFFFF;
  --surface-raised: #F0F0F0;
  --border: #E8E8E8;
  --border-visible: #CCCCCC;
  --text-disabled: #999999;
  --text-secondary: #666666;
  --text-primary: #1A1A1A;
  --text-display: #000000;
  --interactive: #007AFF;
}

body {
  transition: background-color 0.3s ease-out, color 0.3s ease-out;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
  position: relative;
  background: var(--black);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease-out, color 0.3s ease-out;
}

button, input, select {
  font: inherit;
  color: inherit;
  border: 0;
  background: none;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Dot field canvas --- */
.dot-field-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* --- App shell --- */
.app-shell {
  position: relative;
  z-index: 1;
  width: min(100vw - 28px, 1320px);
  height: calc(100vh - 28px);
  height: calc(100dvh - 28px);
  margin: 14px auto;
  padding: var(--space-lg) var(--space-lg) var(--space-md);
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: var(--space-md);
  overflow: hidden;
}

/* --- Topbar --- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.brand-cluster {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.brand-mark {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.brand-subtitle {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.topbar-actions {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.topbar-tools,
.topbar-account-strip {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.topbar-tools {
  justify-content: flex-end;
}

/* --- Instrument bar --- */
.user-badge {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px 14px 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border-visible);
  font-family: var(--font-mono);
  font-size: 12px;
  cursor: default;
}

.user-badge-avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--surface-raised);
  display: grid;
  place-items: center;
  font-size: 10px;
  font-weight: 700;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.user-badge-name {
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-secondary);
}

/* --- Icon buttons --- */
.topbar-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid var(--border-visible);
  color: var(--text-secondary);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.topbar-icon-btn:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

.topbar-icon-btn svg {
  width: 16px;
  height: 16px;
}

.topbar-text-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--border-visible);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.topbar-text-btn:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

/* --- Theme toggle --- */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid var(--border-visible);
  color: var(--text-secondary);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

.theme-toggle svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease-out, opacity 0.2s ease-out;
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  position: absolute;
}

/* Default (dark): moon visible, sun hidden */
.theme-toggle .icon-sun {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

.theme-toggle .icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* Light: sun visible, moon hidden */
.theme-light .theme-toggle .icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.theme-light .theme-toggle .icon-moon {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

/* --- Session info bar --- */
.session-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  padding: var(--space-sm) 0;
  border-top: 1px solid var(--border);
}

.session-stat {
  display: flex;
  align-items: baseline;
  gap: var(--space-xs);
}

.session-stat-value {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 400;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  min-width: 2ch;
  text-align: right;
}

.session-stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-disabled);
}

/* --- Instrument bar (status + route picker) --- */
.instrument-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  padding: var(--space-sm) var(--space-md);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.instrument-status {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.instrument-state-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.instrument-sep {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-disabled);
}

.instrument-route-name {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-disabled);
}

.instrument-route-picker {
  position: relative;
}

.instrument-route-label {
  min-height: 28px;
  padding: 0 var(--space-sm) 0 var(--space-md);
  border-radius: 999px;
  border: 1px solid var(--border-visible);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color 0.15s ease-out;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.instrument-route-label::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 3px solid transparent;
  border-right: 3px solid transparent;
  border-top: 4px solid var(--text-secondary);
  flex-shrink: 0;
}

.instrument-route-label:hover {
  border-color: var(--text-secondary);
}

.instrument-route-dropdown {
  display: none;
  position: absolute;
  bottom: calc(100% + var(--space-sm));
  right: 0;
  z-index: 20;
  min-width: 160px;
  max-height: 240px;
  overflow-y: auto;
  background: var(--surface-raised);
  border: 1px solid var(--border-visible);
  border-radius: 8px;
  padding: var(--space-xs) 0;
  scrollbar-width: none;
}

.instrument-route-dropdown::-webkit-scrollbar {
  display: none;
}

.instrument-route-dropdown.is-open {
  display: block;
}

.instrument-route-item {
  display: flex;
  align-items: center;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background-color 0.1s ease-out, color 0.1s ease-out;
  white-space: nowrap;
  background: none;
  border: none;
  text-align: left;
}

.instrument-route-item:hover {
  background: var(--surface);
  color: var(--text-primary);
}

.instrument-route-item[aria-selected="true"] {
  color: var(--text-primary);
  padding-left: calc(var(--space-md) - 2px);
  border-left: 2px solid var(--accent);
}

/* --- Decorative grid behind orb --- */
.orb-grid {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(480px, 80vw);
  height: min(480px, 80vw);
  border: 1px solid var(--border);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.3;
}

.orb-grid::before {
  content: '';
  position: absolute;
  inset: 40px;
  border: 1px solid var(--border);
  border-radius: 50%;
}

.orb-grid::after {
  content: '';
  position: absolute;
  inset: 80px;
  border: 1px solid var(--border);
  border-radius: 50%;
  opacity: 0.5;
}

/* --- Admin link --- */
.admin-link {
  display: none;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-visible);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s;
}

body.is-admin .admin-link {
  display: flex;
}

.admin-link:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-disabled);
}

body.is-recording .status-dot {
  background: var(--success);
}

body.is-speaking .status-dot {
  background: var(--accent);
}

body.is-thinking .status-dot {
  background: var(--text-secondary);
}

body[data-runtime-state="offline"] .status-dot,
body[data-runtime-state="error"] .status-dot {
  background: var(--warning);
}

/* --- Hero stage --- */
.hero-stage {
  position: relative;
  min-height: 0;
  display: grid;
  justify-items: center;
  align-content: center;
  gap: var(--space-sm);
  text-align: center;
}

/* --- Voice orb (Nothing instrument style) --- */
.voice-orb-shell {
  display: grid;
  place-items: center;
  min-height: 420px;
  transition: min-height 300ms ease-out, transform 300ms ease-out;
}

body[data-voice-orb-layout="compact"] .voice-orb-shell {
  min-height: 260px;
  transform: translateY(0);
}

.dynamic-ellipse {
  position: relative;
  background: var(--black);
  border: 1px solid var(--border-visible);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: width 0.5s ease-out,
              height 0.5s ease-out,
              border-radius 0.5s ease-out,
              transform 0.2s ease-out,
              border-color 0.3s ease-out;
  --ellipse-intensity: var(--orb-intensity, 0);
  width: 100px;
  height: 100px;
  transform: scale(1);
}

/* States */
.dynamic-ellipse[data-mode="idle"] {
  width: 100px;
  height: 100px;
  border-radius: 50%;
}

.dynamic-ellipse[data-mode="arming"],
.dynamic-ellipse[data-mode="listening"],
.dynamic-ellipse[data-mode="recording"] {
  width: 180px;
  height: 140px;
  border-radius: 70px;
  border-color: var(--text-secondary);
  transform: scale(calc(1 + var(--ellipse-intensity) * 0.04));
}

.dynamic-ellipse[data-mode="speaking"] {
  width: 200px;
  height: 150px;
  border-radius: 75px;
  border-color: var(--text-primary);
  transform: scale(calc(1 + var(--ellipse-intensity) * 0.06));
}

.dynamic-ellipse[data-mode="processing"],
.dynamic-ellipse[data-mode="thinking"] {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  border-color: var(--text-secondary);
  animation: ellipse-pulse 1.2s steps(2, end) infinite;
}

/* Waveform bars */
.ellipse-wave {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  height: 100%;
  opacity: 0;
  transition: opacity 0.3s ease-out, transform 0.4s ease-out;
}

.ellipse-bar {
  width: 3px;
  border-radius: 2px;
  background: var(--text-primary);
  height: calc(6px + 24px * var(--ellipse-intensity));
  transition: height 80ms ease;
}

/* Eyes */
.ellipse-face {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  transition: transform 0.3s ease-out, gap 0.3s ease-out;
}

.eye {
  width: 12px;
  height: 12px;
  background: var(--text-primary);
  border-radius: 50%;
  transition: opacity 0.15s ease-out, width 0.2s ease-out, height 0.2s ease-out;
  animation: eye-blink 5s infinite;
  box-sizing: border-box;
}

@keyframes eye-blink {
  0%, 45%, 55%, 100% { opacity: 1; }
  48%, 52% { opacity: 0.2; }
}

/* Idle */
.dynamic-ellipse[data-mode="idle"] .ellipse-face {
  transform: translateY(0);
}
.dynamic-ellipse[data-mode="idle"] .ellipse-wave {
  opacity: 0;
  transform: translateY(10px) scale(0.5);
}

/* Listening */
.dynamic-ellipse[data-mode="arming"] .ellipse-face,
.dynamic-ellipse[data-mode="listening"] .ellipse-face,
.dynamic-ellipse[data-mode="recording"] .ellipse-face {
  transform: none;
  gap: 28px;
}
.dynamic-ellipse[data-mode="arming"] .eye,
.dynamic-ellipse[data-mode="listening"] .eye,
.dynamic-ellipse[data-mode="recording"] .eye {
  width: 14px;
  height: 14px;
  animation: none;
}
.dynamic-ellipse[data-mode="arming"] .ellipse-wave,
.dynamic-ellipse[data-mode="listening"] .ellipse-wave,
.dynamic-ellipse[data-mode="recording"] .ellipse-wave {
  opacity: 1;
  transform: translateY(18px) scale(0.65);
}

/* Thinking */
.dynamic-ellipse[data-mode="processing"] .ellipse-face,
.dynamic-ellipse[data-mode="thinking"] .ellipse-face {
  transform: translateY(0);
  gap: 22px;
}
.dynamic-ellipse[data-mode="processing"] .eye,
.dynamic-ellipse[data-mode="thinking"] .eye {
  width: 10px;
  height: 10px;
}

/* Speaking */
.dynamic-ellipse[data-mode="speaking"] .ellipse-face {
  transform: translateY(-20px);
  gap: 32px;
}
.dynamic-ellipse[data-mode="speaking"] .eye {
  width: 18px;
  height: 8px;
  background: transparent;
  border: 2px solid var(--text-primary);
  border-bottom: 0;
  border-radius: 12px 12px 0 0;
  animation: none;
  transform: translateY(3px);
}
.dynamic-ellipse[data-mode="speaking"] .ellipse-wave {
  opacity: 1;
  transform: translateY(14px) scale(0.8);
}

@keyframes ellipse-pulse {
  0%, 49% { border-color: var(--text-secondary); }
  50%, 100% { border-color: var(--text-disabled); }
}

/* --- Subtitle / transcript area --- */
.subtitle-stack {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(100%, 620px);
  display: grid;
  gap: var(--space-sm);
  pointer-events: none;
  z-index: 10;
  transition: transform 260ms ease, opacity 220ms ease;
}

.subtitle-stack * {
  pointer-events: auto;
}

.subtitle-card {
  display: grid;
  gap: var(--space-sm);
  padding: 0;
  border-radius: 0;
  background: transparent;
  border: 0;
}

.subtitle-label,
.voice-orb-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-disabled);
}

.subtitle-text {
  margin: 0;
  min-height: 2.4em;
  line-height: 1.6;
  font-size: 16px;
  color: var(--text-secondary);
}

.caption-messages {
  display: grid;
  gap: var(--space-xs);
  max-height: 120px;
  overflow-y: auto;
  scrollbar-width: none;
}

.caption-messages::-webkit-scrollbar {
  display: none;
}

.message {
  width: 100%;
}

.message-body {
  width: 100%;
}

.message-meta {
  display: none;
}

.message-content {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.6;
  font-size: 14px;
  color: var(--text-secondary);
}

.message.user .message-content {
  color: var(--text-primary);
}

/* --- Voice status block --- */
.voice-orb-copy,
.voice-status-block {
  display: grid;
  justify-items: center;
  gap: var(--space-xs);
}

.voice-orb-state {
  display: block;
  margin-top: 2px;
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 56px);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--text-display);
}

.voice-action-hint {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
}

/* --- Control dock --- */
.control-dock {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
}

.control-stack {
  display: grid;
  justify-items: center;
  gap: var(--space-md);
}

.voice-mode-switch {
  display: inline-grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding: var(--space-xs);
  border: 1px solid var(--border-visible);
  border-radius: 999px;
  position: relative;
  overflow: hidden;
}

.voice-mode-indicator {
  position: absolute;
  top: var(--space-xs);
  left: var(--space-xs);
  width: calc(50% - var(--space-xs));
  height: calc(100% - 2 * var(--space-xs));
  background: var(--text-display);
  border-radius: 999px;
  transform: translateX(0);
  transition: transform 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
  z-index: 0;
}

.voice-mode-indicator[data-mode="manual"] {
  transform: translateX(100%);
}

.voice-mode-btn {
  min-height: 34px;
  padding: 0 var(--space-md);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 0.2s ease-out, opacity 0.2s ease-out;
  position: relative;
  z-index: 1;
  background: transparent;
}

.voice-mode-btn[data-active="true"] {
  color: var(--black);
}

.voice-mode-btn:disabled {
  opacity: 0.42;
  cursor: not-allowed;
}

.voice-primary-btn {
  position: relative;
  min-width: 180px;
  height: 56px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0 var(--space-xl);
  background: var(--text-display);
  color: var(--black);
  border: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity 0.2s ease-out, background-color 0.2s ease-out, border-color 0.2s ease-out;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  touch-action: manipulation;
}

.voice-primary-pill-bg { display: none; }

.voice-primary-btn svg {
  position: relative;
  z-index: 1;
  width: 24px;
  height: 24px;
}

.voice-primary-text {
  position: relative;
  z-index: 1;
  white-space: nowrap;
  transition: opacity 150ms ease, transform 200ms ease;
}

.primary-stop-icon {
  position: relative;
  z-index: 1;
  display: none;
  width: 14px;
  height: 14px;
  border-radius: 3px;
  background: currentColor;
}

.voice-primary-btn[data-action="stop"] .mic-icon {
  display: none;
}

/* 关闭会话按钮：胶囊形，实心深色，主要动作 */
.voice-primary-btn[data-action="stop"] {
  height: 56px;
  border-radius: 999px;
  padding: 0 var(--space-xl);
  gap: var(--space-sm);
  background: var(--text-display);
  color: var(--black);
}

.voice-primary-btn[data-action="stop"] .voice-primary-text {
  opacity: 1;
  transform: none;
  width: auto;
  margin: 0;
  padding: 0;
  font-size: 12px;
  line-height: normal;
}

.voice-primary-btn[data-action="stop"] .primary-stop-icon {
  display: block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.voice-primary-btn[data-action="stop"] .pulse-ring {
  display: none;
}

.voice-primary-btn[data-action="stop"] .recording-timer {
  display: none;
}

.voice-primary-btn[data-action="arming"] .pulse-ring {
  opacity: 1;
  animation-duration: 0.9s;
}

.voice-primary-btn:hover:not(:disabled) {
  opacity: 0.88;
}

.voice-primary-btn:active:not(:disabled) {
  opacity: 0.75;
}

.pulse-ring {
  position: absolute;
  inset: -4px;
  border-radius: inherit;
  border: 2px solid var(--accent);
  opacity: 0;
}

body.is-recording .voice-primary-btn {
  background: var(--accent);
  color: var(--text-display);
}

body.is-recording .pulse-ring {
  opacity: 1;
  animation: pulse-ring 1.8s steps(2, end) infinite;
}

body.is-speaking .voice-primary-btn {
  background: transparent;
  border: 1px solid var(--text-primary);
  color: var(--text-primary);
}

.voice-primary-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* --- Modal --- */
body.modal-open {
  overflow: hidden;
}

.modal-shell {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: var(--space-lg);
}

.modal-shell[hidden] {
  display: none !important;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
}

.modal-card {
  position: relative;
  z-index: 1;
  width: min(100%, 436px);
  padding: var(--space-md);
  border-radius: 6px;
  border: 1px solid var(--border-visible);
  background: var(--surface);
  overflow: hidden;
}

.modal-card::after {
  content: '';
  position: absolute;
  inset: 12px;
  border: 1px solid var(--border);
  pointer-events: none;
}

.modal-grid {
  height: 18px;
  margin: calc(-1 * var(--space-xs)) calc(-1 * var(--space-xs)) var(--space-md);
  border-bottom: 1px solid var(--border);
  background-image: radial-gradient(circle, var(--border-visible) 0.8px, transparent 0.8px);
  background-size: 10px 10px;
  background-position: 0 1px;
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  position: relative;
  z-index: 1;
}

.modal-eyebrow {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-disabled);
}

.modal-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 400;
  line-height: 1.05;
  color: var(--text-display);
}

.modal-subtitle {
  max-width: 300px;
  margin: var(--space-sm) 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.modal-form {
  display: grid;
  gap: var(--space-md);
  position: relative;
  z-index: 1;
}

.modal-field {
  display: grid;
  gap: var(--space-sm);
}

.modal-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.modal-input {
  width: 100%;
  height: 46px;
  padding: 0 12px;
  border-radius: 2px;
  border: 1px solid var(--border-visible);
  border-bottom-color: var(--text-secondary);
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.01em;
}

.modal-input:focus {
  border-color: var(--text-primary);
  background: var(--surface-raised);
}

.modal-input::placeholder {
  color: var(--text-disabled);
}

.modal-divider {
  height: 1px;
  margin-top: 4px;
  background: var(--border-visible);
}

.modal-status {
  min-height: 1.5em;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.modal-status[data-tone="error"] {
  color: var(--accent);
}

.modal-status[data-tone="success"] {
  color: var(--success);
}

.modal-note {
  margin: calc(-1 * var(--space-sm)) 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-disabled);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.modal-secondary-btn,
.modal-primary-btn {
  min-width: 108px;
  height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity 0.2s ease-out, border-color 0.2s ease-out, color 0.2s ease-out;
}

.modal-secondary-btn {
  border: 1px solid var(--border-visible);
  color: var(--text-secondary);
}

.modal-secondary-btn:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

.modal-primary-btn {
  background: var(--text-display);
  color: var(--black);
}

.modal-primary-btn:hover {
  opacity: 0.88;
}

.modal-secondary-btn:disabled,
.modal-primary-btn:disabled {
  opacity: 0.45;
  cursor: wait;
}

.theme-light .modal-backdrop {
  background: rgba(245, 245, 245, 0.92);
}

@keyframes pulse-ring {
  0%, 49% { opacity: 0.6; }
  50%, 100% { opacity: 0; }
}

*:focus-visible {
  outline: 2px solid var(--text-secondary);
  outline-offset: 2px;
}

/* --- Hidden elements --- */
.ambient,
.ambient-a,
.ambient-b,
.space-bg,
.stars-small,
.stars-medium,
.stars-large,
.tech-grid {
  display: none;
}

/* --- Theme transition on surfaces --- */
.login-card,
.user-badge,
.topbar-icon-btn,
.theme-toggle,
.admin-link,
.dynamic-ellipse,
.voice-primary-btn {
  transition-property: background-color, border-color, color;
  transition-duration: 0.3s;
  transition-timing-function: ease-out;
}

/* --- Safe area (notched phones) --- */
@supports (padding-top: env(safe-area-inset-top)) {
  .app-shell {
    padding-top: calc(var(--space-lg) + env(safe-area-inset-top));
  }
  .login-shell {
    padding-top: calc(var(--space-lg) + env(safe-area-inset-top));
  }
}

/* --- Responsive: tablet / small desktop --- */
@media (max-width: 900px) {
  .app-shell {
    width: 100vw;
    height: auto;
    min-height: calc(100vh - 8px);
    min-height: calc(100dvh - 8px);
    margin: 0;
    padding: var(--space-md) var(--space-md) var(--space-lg);
    padding-top: calc(var(--space-md) + env(safe-area-inset-top, 0px));
    padding-bottom: calc(var(--space-lg) + env(safe-area-inset-bottom, 0px));
  }

  .instrument-bar {
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .voice-orb-shell {
    min-height: 320px;
  }

  .orb-grid {
    width: min(360px, 75vw);
    height: min(360px, 75vw);
  }

  .subtitle-stack {
    width: calc(100% - 32px);
  }

  .session-info {
    gap: var(--space-lg);
  }

  .session-stat-value {
    font-size: 16px;
  }

  .topbar-icon-btn,
  .theme-toggle,
  .topbar-text-btn {
    width: 34px;
    height: 34px;
  }

  .topbar-text-btn {
    min-width: 108px;
    padding: 0 var(--space-sm);
    font-size: 11px;
  }

  .user-badge {
    width: 100%;
    min-width: 0;
    justify-content: flex-start;
    padding: 4px 10px 4px 8px;
    font-size: 11px;
  }

  .user-badge-avatar {
    width: 20px;
    height: 20px;
    font-size: 9px;
  }

  .user-badge-name {
    max-width: 72px;
  }

  .voice-status-pill {
    padding: 4px 10px;
    font-size: 11px;
  }

  .voice-orb-shell {
    min-height: 260px;
  }

  .orb-grid {
    width: min(280px, 70vw);
    height: min(280px, 70vw);
  }

  .dynamic-ellipse[data-mode="idle"] {
    width: 80px;
    height: 80px;
  }

  .dynamic-ellipse[data-mode="arming"],
  .dynamic-ellipse[data-mode="listening"],
  .dynamic-ellipse[data-mode="recording"] {
    width: 150px;
    height: 120px;
    border-radius: 60px;
  }

  .dynamic-ellipse[data-mode="speaking"] {
    width: 170px;
    height: 130px;
    border-radius: 65px;
  }

  .dynamic-ellipse[data-mode="processing"],
  .dynamic-ellipse[data-mode="thinking"] {
    width: 90px;
    height: 90px;
  }

  .subtitle-stack {
    width: calc(100% - 16px);
    bottom: 0;
  }

  .subtitle-text {
    font-size: 14px;
  }

  .message-content {
    font-size: 14px;
  }

  .session-info {
    gap: var(--space-md);
    padding: var(--space-xs) 0;
  }

  .session-stat-value {
    font-size: 14px;
  }

  .session-stat-label {
    font-size: 11px;
  }

  .control-stack {
    width: 100%;
  }

  .voice-mode-switch {
    width: min(100%, 320px);
  }

  .voice-mode-btn {
    min-height: 32px;
    padding: 0 var(--space-sm);
    font-size: 11px;
  }

  .voice-primary-btn {
    min-width: 150px;
    height: 50px;
    font-size: 12px;
    padding: 0 var(--space-lg);
  }

  .voice-primary-btn svg {
    width: 20px;
    height: 20px;
  }

  .voice-primary-btn[data-action="stop"] {
    height: 50px;
    padding: 0 var(--space-lg);
  }

  /* Login page mobile */
  .login-shell {
    padding: var(--space-md);
    padding-top: calc(10dvh + env(safe-area-inset-top, 0px));
    padding-bottom: calc(var(--space-md) + env(safe-area-inset-bottom, 0px));
    align-items: flex-start;
  }

  .login-card {
    padding: var(--space-xl) var(--space-lg);
  }

  .login-title {
    font-size: 24px;
  }

  .form-input {
    height: 44px;
    font-size: 14px;
  }

  .login-btn {
    height: 48px;
    font-size: 12px;
  }

  .login-theme-toggle {
    top: var(--space-md);
    right: var(--space-md);
  }

  .modal-shell {
    padding: var(--space-sm);
  }

  .modal-card {
    padding: 16px;
    border-radius: 4px;
  }

  .modal-title {
    font-size: 24px;
  }

  .modal-subtitle {
    max-width: none;
    font-size: 12px;
  }

  .modal-actions {
    flex-direction: column-reverse;
  }

  .modal-secondary-btn,
  .modal-primary-btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .dynamic-ellipse,
  .eye,
  .pulse-ring,
  .thinking-spinner {
    animation: none !important;
  }
}

/* =========================================================
   Mobile Voice UX Enhancements
   ========================================================= */

/* --- PTT 录音计时器 --- */
.recording-timer {
  display: none;
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--text-primary);
}

body.is-recording .recording-timer {
  display: inline;
}

/* PTT 按住状态强化 */
body.is-recording .voice-primary-btn:active {
  opacity: 0.7;
}

/* 录音时脉冲加速 */
body.is-recording .pulse-ring {
  animation: pulse-ring 1s steps(2, end) infinite;
}

/* arming 状态（未达最短时长）通过 pulse-ring 颜色提示 */
body[data-runtime-state="arming"] .voice-primary-btn {
  /* button stays --text-display */
}

body[data-runtime-state="arming"] .pulse-ring {
  border-color: var(--warning);
  animation: pulse-ring 0.8s steps(2, end) infinite;
}

/* --- Thinking Spinner (segmented) --- */
.thinking-spinner {
  display: none;
  position: relative;
  z-index: 1;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  flex-shrink: 0;
  background: conic-gradient(
    currentColor 0deg,
    transparent 90deg,
    currentColor 180deg,
    transparent 270deg
  );
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 2.5px), #000 calc(100% - 2.5px));
  mask: radial-gradient(farthest-side, transparent calc(100% - 2.5px), #000 calc(100% - 2.5px));
  opacity: 0.7;
}

body[data-runtime-state="thinking"] #recordBtn .thinking-spinner {
  display: block;
  animation: spinner-rotate 0.8s steps(8, end) infinite;
}

body[data-runtime-state="thinking"] #recordBtn .mic-icon {
  display: none;
}

@keyframes spinner-rotate {
  to { transform: rotate(360deg); }
}

/* --- Mobile sizing overrides --- */
@media (max-width: 480px) {
  .voice-primary-btn[data-action="stop"] {
    height: 50px;
    padding: 0 20px;
    font-size: 11px;
  }
}