:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --text: #0f172a;
  --text-secondary: #1d4ed8;
  --muted: #475569;
  --accent: #2563eb;
  --accent-2: #3b82f6;
  --on-accent: #ffffff;
  --border: #e2e8f0;
  --takeaway: #eff6ff;
  --error: #dc2626;
  --warm: #047857;
  --warm-bg: #ecfdf5;
  --moderate: #b45309;
  --moderate-bg: #fffbeb;
  --hard: #b91c1c;
  --hard-bg: #fef2f2;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}

a { color: var(--accent); }

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 16px 48px;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  display: grid;
  place-items: center;
  font-size: 20px;
}

.brand h1 {
  margin: 0;
  font-size: 1.35rem;
  color: var(--text);
}

.brand p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.header-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ghost-btn, .send-btn, .retry-btn {
  border: 0;
  cursor: pointer;
  font: inherit;
}

.ghost-btn {
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 10px;
}

.privacy-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.privacy-link:hover { text-decoration: underline; }

.catalog-lede {
  color: var(--muted);
  max-width: 42rem;
  margin: 0 0 16px;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}

.scenario-card {
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
  cursor: pointer;
  font: inherit;
  color: inherit;
}

.scenario-card:hover { border-color: var(--accent-2); }
.scenario-card-free { box-shadow: 0 0 0 1px var(--accent) inset; }

.scenario-card h3 {
  margin: 8px 0 6px;
  font-size: 1.05rem;
}

.scenario-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.persona-line {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.badge-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: lowercase;
  padding: 3px 8px;
  border-radius: 999px;
}

.badge-warm-up { background: var(--warm-bg); color: var(--warm); }
.badge-moderate { background: var(--moderate-bg); color: var(--moderate); }
.badge-hard { background: var(--hard-bg); color: var(--hard); }
.badge-free { background: var(--takeaway); color: var(--accent); }

.conversation {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 16px;
  min-height: 70vh;
}

@media (max-width: 800px) {
  .conversation { grid-template-columns: 1fr; }
}

.scenario-panel {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
  height: fit-content;
}

.scenario-panel h2 { margin: 8px 0 6px; font-size: 1.1rem; }
.scenario-panel p { margin: 0; color: var(--muted); font-size: 0.9rem; }
.scenario-panel h4 { margin: 14px 0 6px; font-size: 0.85rem; color: var(--text-secondary); }

.persona-box {
  margin-top: 12px;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.persona-name { font-weight: 700; }
.persona-role, .persona-mood { font-size: 0.85rem; color: var(--muted); }

.goals { margin: 0; padding-left: 1.1rem; font-size: 0.9rem; color: var(--text); }
.goals.collapsed { display: none; }

.chat {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 14px;
  min-height: 70vh;
  overflow: hidden;
  background: var(--surface);
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.msg { max-width: 88%; }
.msg-user { align-self: flex-end; }
.msg-counterpart { align-self: flex-start; }
.msg-coach { align-self: stretch; max-width: 100%; }

.msg-author {
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 4px;
}

.msg-bubble {
  padding: 10px 12px;
  border-radius: 12px;
  white-space: pre-wrap;
}

.msg-user .msg-bubble {
  background: var(--accent);
  color: var(--on-accent);
}

.msg-counterpart .msg-bubble {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  color: var(--text);
}

.feedback-card {
  margin-top: 8px;
  background: var(--takeaway);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
}

.feedback-card h4 {
  margin: 0 0 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.score-row {
  display: grid;
  grid-template-columns: 110px 1fr 36px;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  margin-bottom: 4px;
}

.score-track {
  height: 6px;
  background: #e2e8f0;
  border-radius: 999px;
  overflow: hidden;
}

.score-fill { height: 100%; border-radius: 999px; }
.score-value { text-align: right; font-variant-numeric: tabular-nums; }

.feedback-tips {
  margin: 8px 0 0;
  padding-left: 1.1rem;
  font-size: 0.85rem;
  color: var(--text);
}

.composer {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 10px;
  border-top: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
}

.composer textarea {
  flex: 1;
  resize: none;
  min-height: 48px;
  max-height: 120px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
}

.send-btn, .retry-btn {
  background: var(--accent);
  color: var(--on-accent);
  border-radius: 10px;
  padding: 0 16px;
  min-height: 48px;
  font-weight: 600;
  flex-shrink: 0;
  white-space: nowrap;
}

.composer .send-btn {
  flex: 0 0 88px;
  width: 88px;
  height: 48px;
  line-height: 48px;
  padding: 0;
  text-align: center;
}

.send-btn:disabled { opacity: 0.45; cursor: not-allowed; }

.recap {
  margin: 8px 16px 16px;
  padding: 14px 16px;
  background: var(--takeaway);
  border: 1px solid var(--border);
  border-radius: 14px;
}

.recap h3 { margin: 0 0 8px; }
.recap p { margin: 0 0 12px; color: var(--muted); }

.banner {
  background: #fef2f2;
  color: var(--error);
  border: 1px solid #fecaca;
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 12px;
}

.note {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 16px;
}

.privacy-main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.privacy-main h1 { font-size: 1.75rem; margin: 0 0 8px; }
.privacy-main h2 { font-size: 1.15rem; margin: 28px 0 8px; }
.privacy-main .muted { color: var(--muted); font-size: 0.95rem; }
.privacy-main .card {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 18px;
  margin: 16px 0;
}
.privacy-main ul { padding-left: 1.2rem; }
.privacy-main .back { font-size: 0.9rem; }