:root {
  --bg: #f3efe7;
  --bg-elevated: rgba(255, 250, 242, 0.88);
  --panel: #fffdf9;
  --panel-strong: #fff8ef;
  --line: rgba(71, 56, 42, 0.12);
  --text: #271d14;
  --muted: #7a6b5b;
  --accent: #c85e2f;
  --accent-strong: #a44b24;
  --soft: #ece2d6;
  --shadow: 0 18px 40px rgba(59, 37, 16, 0.14);
  --radius: 24px;
  --radius-sm: 16px;
  --font-ui: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(233, 194, 151, 0.45), transparent 32%),
    linear-gradient(180deg, #f8f3ec 0%, #f3ede5 45%, #efe8de 100%);
  color: var(--text);
  font-family: var(--font-ui);
}

body {
  min-height: 100vh;
}

button,
textarea {
  font: inherit;
}

.hidden {
  display: none !important;
}

.app-shell {
  width: min(100%, 720px);
  min-height: 100vh;
  margin: 0 auto;
  padding: env(safe-area-inset-top, 0) 16px calc(104px + env(safe-area-inset-bottom, 0));
  position: relative;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 4px 14px;
  background: linear-gradient(180deg, rgba(243, 239, 231, 0.95), rgba(243, 239, 231, 0.7), transparent);
  backdrop-filter: blur(10px);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.topbar h1 {
  margin: 0;
  font-size: 22px;
  line-height: 1.15;
}

.stage-badge {
  border: 0;
  background: var(--panel);
  color: var(--accent-strong);
  padding: 10px 14px;
  border-radius: 999px;
  box-shadow: var(--shadow);
  white-space: nowrap;
}

.chat-screen {
  padding-bottom: 24px;
}

.messages {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.message {
  max-width: 92%;
  padding: 14px 16px;
  border-radius: 22px;
  line-height: 1.6;
  box-shadow: var(--shadow);
  animation: rise-in 180ms ease-out;
}

.message.assistant {
  align-self: flex-start;
  background: rgba(255, 252, 247, 0.96);
  border-top-left-radius: 8px;
}

.message.user {
  align-self: flex-end;
  background: linear-gradient(135deg, #c85e2f, #db7a46);
  color: white;
  border-top-right-radius: 8px;
}

.meta-line {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
}

.floating-actions {
  position: fixed;
  right: max(16px, calc((100vw - min(100vw, 720px)) / 2 + 16px));
  bottom: calc(116px + env(safe-area-inset-bottom, 0));
  z-index: 12;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-end;
}

.fab {
  border: 0;
  border-radius: 999px;
  padding: 12px 16px;
  box-shadow: var(--shadow);
}

.fab.primary {
  background: var(--accent);
  color: white;
}

.fab.secondary {
  background: var(--panel);
  color: var(--text);
}

.input-bar {
  position: fixed;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: min(100%, 720px);
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom, 0));
  background: linear-gradient(180deg, rgba(243, 239, 231, 0.15), rgba(243, 239, 231, 0.92) 20%, rgba(243, 239, 231, 0.98) 100%);
  backdrop-filter: blur(18px);
  z-index: 15;
}

.quick-actions {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: none;
}

.quick-actions::-webkit-scrollbar {
  display: none;
}

.chip {
  border: 1px solid var(--line);
  background: rgba(255, 252, 247, 0.9);
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--muted);
  white-space: nowrap;
}

.composer {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  background: var(--panel);
  border: 1px solid rgba(90, 66, 36, 0.08);
  border-radius: 24px;
  padding: 10px;
  box-shadow: var(--shadow);
}

#messageInput {
  flex: 1;
  resize: none;
  min-height: 44px;
  max-height: 132px;
  border: 0;
  background: transparent;
  outline: none;
  color: var(--text);
}

#sendButton {
  border: 0;
  background: var(--accent);
  color: white;
  min-width: 68px;
  height: 44px;
  border-radius: 16px;
}

.sheet {
  position: fixed;
  inset: 0;
  z-index: 30;
}

.sheet-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(22, 16, 10, 0.28);
}

.sheet-panel {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  max-height: 84vh;
  overflow: auto;
  background: linear-gradient(180deg, #fffdf9 0%, #fbf6ee 100%);
  border-radius: 26px 26px 0 0;
  padding: 18px 16px calc(24px + env(safe-area-inset-bottom, 0));
  box-shadow: 0 -12px 32px rgba(58, 37, 17, 0.12);
  animation: slide-up 220ms ease-out;
}

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

.sheet-header h2 {
  margin: 0;
  font-size: 20px;
}

.icon-button {
  border: 0;
  background: var(--soft);
  color: var(--text);
  padding: 9px 14px;
  border-radius: 999px;
}

.summary-list,
.card-list,
.recommendation-groups {
  display: grid;
  gap: 12px;
}

.summary-item,
.candidate-card,
.group-card {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(90, 66, 36, 0.08);
  border-radius: var(--radius-sm);
  padding: 14px;
}

.candidate-card h3,
.group-card h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.candidate-meta,
.program-meta {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.source-link {
  color: var(--accent-strong);
  text-decoration: none;
  border-bottom: 1px solid rgba(164, 75, 36, 0.25);
}

.score-pill {
  display: inline-flex;
  margin-top: 10px;
  padding: 6px 10px;
  border-radius: 999px;
  background: #f2e3d7;
  color: var(--accent-strong);
  font-size: 12px;
}

.program-card {
  margin-top: 10px;
  padding: 12px;
  background: var(--panel-strong);
  border-radius: 14px;
}

@keyframes slide-up {
  from {
    transform: translateY(24px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes rise-in {
  from {
    transform: translateY(8px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (min-width: 900px) {
  .app-shell {
    padding-left: 28px;
    padding-right: 28px;
  }

  .message {
    max-width: 72%;
  }

  .sheet-panel {
    left: 50%;
    right: auto;
    width: min(720px, 100vw);
    transform: translateX(-50%);
  }
}