styles.css

:root {
  --bg-main: #f4f8f2;
  --bg-panel: #fbf5e8;
  --bg-chat: #fffdfa;
  --text-main: #1f2f2a;
  --text-muted: #57645f;
  --brand: #2e8b72;
  --brand-strong: #236d58;
  --accent: #e07b52;
  --accent-soft: #f3cfb1;
  --shadow: 0 14px 35px rgba(30, 43, 40, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  background: radial-gradient(circle at 12% 10%, #e6f2ec 0, transparent 45%),
    radial-gradient(circle at 82% 18%, #fce8d7 0, transparent 38%),
    linear-gradient(135deg, #f8faf5 0%, #f7efe5 50%, #f5f7f0 100%);
  color: var(--text-main);
  display: flex;
  justify-content: center;
  padding: 20px 14px 32px;
  overflow-x: hidden;
}

.ambient-shape {
  position: fixed;
  border-radius: 50%;
  z-index: 0;
  opacity: 0.45;
  filter: blur(0.5px);
  pointer-events: none;
}

.ambient-shape--one {
  width: 320px;
  height: 320px;
  right: -110px;
  top: -100px;
  background: linear-gradient(140deg, #fee6c8, #f4be86);
}

.ambient-shape--two {
  width: 240px;
  height: 240px;
  left: -120px;
  bottom: 80px;
  background: linear-gradient(150deg, #c8f0df, #7cc6aa);
}

.app-shell {
  position: relative;
  z-index: 1;
  width: min(980px, 100%);
  min-height: calc(100vh - 52px);
  max-height: calc(100vh - 52px);
  border-radius: 26px;
  padding: 16px;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: 12px;
  background: rgba(255, 253, 248, 0.92);
  border: 1px solid rgba(41, 63, 56, 0.14);
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 10px;
}

.app-title {
  margin: 0;
  font-family: "Ma Shan Zheng", cursive;
  font-size: clamp(1.45rem, 3vw, 2rem);
  color: var(--brand-strong);
  letter-spacing: 0.03em;
}

.app-subtitle {
  margin: 4px 0 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.profile-panel {
  border-radius: 18px;
  padding: 10px 14px;
  background: linear-gradient(120deg, rgba(208, 241, 227, 0.88), rgba(254, 233, 210, 0.9));
  border: 1px solid rgba(35, 109, 88, 0.2);
}

.profile-item {
  margin: 0;
  font-size: 0.88rem;
  color: #2d4e44;
}

.profile-item + .profile-item {
  margin-top: 4px;
}

.chat-thread {
  overflow-y: auto;
  padding: 8px 4px 8px 2px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-thread::-webkit-scrollbar {
  width: 9px;
}

.chat-thread::-webkit-scrollbar-thumb {
  background: rgba(84, 118, 106, 0.45);
  border-radius: 99px;
}

.message-row {
  display: flex;
  animation: rise 220ms ease-out;
}

.message-row--user {
  justify-content: flex-end;
}

.message-row--assistant {
  justify-content: flex-start;
}

.bubble {
  max-width: min(760px, 100%);
  border-radius: 18px;
  padding: 12px;
  display: grid;
  gap: 8px;
}

.bubble--user {
  background: linear-gradient(140deg, #326d5f, #3f9079);
  color: #f8fffc;
  border-top-right-radius: 4px;
}

.bubble--assistant {
  background: var(--bg-chat);
  border: 1px solid rgba(66, 84, 75, 0.18);
  border-top-left-radius: 4px;
}

.user-text {
  margin: 0;
  line-height: 1.45;
}

.assistant-paragraph {
  margin: 0;
  padding: 11px 12px;
  border-radius: 12px;
  background: #fcfaf5;
  border: 1px solid rgba(58, 81, 72, 0.12);
  line-height: 1.58;
  position: relative;
  touch-action: pan-y;
  user-select: none;
  transition: transform 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
  will-change: transform;
}

.assistant-paragraph::before,
.assistant-paragraph::after {
  position: absolute;
  top: 10px;
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  opacity: 0;
  transition: opacity 120ms ease;
}

.assistant-paragraph::before {
  content: "Left: Explain / Hold Voice";
  right: 10px;
  color: #3c7b67;
}

.assistant-paragraph::after {
  content: "Right: Details";
  left: 10px;
  color: #b35d35;
}

.assistant-paragraph.dragging {
  border-color: rgba(46, 139, 114, 0.45);
  box-shadow: 0 8px 18px rgba(54, 90, 77, 0.14);
}

.assistant-paragraph.dragging::before,
.assistant-paragraph.dragging::after {
  opacity: 1;
}

.assistant-paragraph.recording {
  border-color: rgba(224, 123, 82, 0.6);
  background: linear-gradient(125deg, #fff6ec, #fde8d6);
}

.assistant-paragraph.recording .recording-wave {
  opacity: 1;
  transform: translateY(0);
}

.recording-wave {
  margin-top: 8px;
  font-size: 0.75rem;
  color: #b1492e;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 120ms ease, transform 120ms ease;
}

.paragraph-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
  gap: 8px;
  font-size: 0.76rem;
  color: #65726c;
}

.hint-pill {
  border-radius: 999px;
  padding: 2px 8px;
  background: #ecf2ed;
  border: 1px solid rgba(60, 93, 82, 0.2);
}

.detail-counter {
  font-variant-numeric: tabular-nums;
}

.composer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 4px;
}

.composer-input {
  width: 100%;
  border: 1px solid rgba(64, 89, 80, 0.26);
  border-radius: 12px;
  padding: 11px 13px;
  font-size: 0.98rem;
  background: #fffefb;
  outline: none;
}

.composer-input:focus {
  border-color: rgba(46, 139, 114, 0.7);
  box-shadow: 0 0 0 2px rgba(52, 139, 115, 0.16);
}

.primary-button,
.secondary-button {
  border: 0;
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 0.9rem;
  cursor: pointer;
}

.primary-button {
  background: linear-gradient(135deg, #2d8b72, #3ba98a);
  color: #f5fff9;
}

.secondary-button {
  background: #eef5f0;
  color: #2a5548;
  border: 1px solid rgba(50, 86, 74, 0.24);
}

.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(12, 20, 17, 0.38);
  z-index: 9;
}

.detail-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(430px, 90vw);
  height: 100vh;
  background: #fffef9;
  border-left: 1px solid rgba(50, 74, 66, 0.2);
  box-shadow: -12px 0 30px rgba(22, 36, 32, 0.18);
  z-index: 10;
  transform: translateX(104%);
  transition: transform 180ms ease;
  padding: 18px 16px;
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 14px;
}

.detail-drawer.open {
  transform: translateX(0);
}

.detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.detail-title {
  margin: 0;
  color: #234e42;
}

.detail-label {
  margin: 0 0 6px;
  color: #3f5f56;
  font-size: 0.84rem;
}

.detail-block {
  margin: 0;
  border-radius: 12px;
  padding: 10px 11px;
  background: #f7f6f1;
  border: 1px solid rgba(58, 82, 73, 0.16);
  line-height: 1.56;
}

.detail-history {
  overflow-y: auto;
  display: grid;
  gap: 10px;
  padding-right: 2px;
}

.history-card {
  border-radius: 12px;
  border: 1px solid rgba(67, 87, 80, 0.15);
  background: #fcfbf7;
  padding: 9px 10px;
}

.history-meta {
  margin: 0;
  font-size: 0.75rem;
  color: #6e7c76;
}

.history-text {
  margin: 4px 0 0;
  line-height: 1.55;
}

.empty-history {
  margin: 0;
  color: #64726c;
  font-size: 0.9rem;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translate(-50%, 20px);
  background: rgba(32, 56, 49, 0.93);
  color: #f4fffa;
  padding: 9px 14px;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
  z-index: 12;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .app-shell {
    border-radius: 20px;
    min-height: calc(100vh - 20px);
    max-height: calc(100vh - 20px);
  }

  .app-header {
    padding: 6px 6px 8px;
  }

  .app-subtitle {
    font-size: 0.83rem;
  }
}

@media (max-width: 560px) {
  body {
    padding: 0;
  }

  .app-shell {
    width: 100%;
    min-height: 100vh;
    max-height: 100vh;
    border-radius: 0;
    border: 0;
    padding: 12px 10px;
  }

  .composer {
    grid-template-columns: 1fr;
  }

  .primary-button {
    width: 100%;
  }

  .detail-drawer {
    width: 100vw;
  }
}