/* ============================================================
   demo.css  —  CallBackAgent demo / product detail page
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --text: #1a1a1a;
  --muted: #555;
  --border: #e5e5e5;
  --bg: #f9f9f7;
  --bg-white: #fff;
  --bg-tinted: #f3f4f6;
  --bg-blue-light: #eef4ff;
  --radius: 8px;
  --radius-lg: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

/* ── Header ─────────────────────────────────────────────── */

header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.3px;
}

.logo span { color: var(--blue); }

nav { display: flex; align-items: center; gap: 1.5rem; }

nav a {
  font-size: 0.9rem;
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
}

nav a:hover { color: var(--text); }

.btn-small {
  background: var(--blue);
  color: #fff;
  text-decoration: none;
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.15s;
}

.btn-small:hover { background: var(--blue-dark); }

/* ── Page title banner ───────────────────────────────────── */

.page-banner {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: 3rem 1.5rem 2.5rem;
  text-align: center;
}

.page-banner h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.4px;
  margin-bottom: 0.75rem;
}

.page-banner p {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ── Section wrapper ─────────────────────────────────────── */

.section {
  max-width: 860px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem;
}

.section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.section-alt {
  background: var(--bg-white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* ── Overview ────────────────────────────────────────────── */

.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 0.5rem;
}

.overview-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
}

.overview-card .card-icon {
  font-size: 1.6rem;
  margin-bottom: 0.6rem;
  display: block;
}

.overview-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.overview-card p { font-size: 0.87rem; color: var(--muted); }

/* ── Workflow steps ──────────────────────────────────────── */

.workflow-steps { list-style: none; }

.workflow-step {
  display: flex;
  gap: 1.25rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}

.workflow-step:last-child { border-bottom: none; }

.wf-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: var(--blue);
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  font-size: 1rem;
}

.wf-body h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.3rem; }
.wf-body p { font-size: 0.9rem; color: var(--muted); }

/* ── Use cases ───────────────────────────────────────────── */

.use-case-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.tab-btn {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.45rem 1rem;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--muted);
}

.tab-btn:hover, .tab-btn.active {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

.use-case-panel {
  display: none;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.use-case-panel.active { display: block; }

.use-case-panel h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.use-case-panel p { font-size: 0.9rem; color: var(--muted); line-height: 1.65; }

.use-case-panel .scenario {
  margin-top: 1rem;
  background: var(--bg-tinted);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  font-size: 0.87rem;
  color: #333;
  font-style: italic;
  line-height: 1.7;
}

/* ── Example output ──────────────────────────────────────── */

.output-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
}

.box-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--blue);
  margin-bottom: 0.6rem;
}

.lead-card {
  background: var(--bg-blue-light);
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
  font-size: 0.9rem;
  color: var(--text);
}

.lead-card table { border-collapse: collapse; width: 100%; }
.lead-card td { padding: 0.28rem 0; vertical-align: top; }
.lead-card td:first-child {
  font-weight: 600;
  width: 130px;
  color: var(--muted);
  white-space: nowrap;
}

.classification-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
  font-size: 0.9rem;
}

.classification-card table { border-collapse: collapse; width: 100%; }
.classification-card td { padding: 0.28rem 0; vertical-align: top; }
.classification-card td:first-child {
  font-weight: 600;
  width: 150px;
  color: var(--muted);
  white-space: nowrap;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-green { background: #d1fae5; color: #065f46; }
.badge-yellow { background: #fef3c7; color: #92400e; }
.badge-red { background: #fee2e2; color: #991b1b; }
.badge-blue { background: #dbeafe; color: #1e40af; }

/* ── CTA block ───────────────────────────────────────────── */

.cta-block {
  text-align: center;
  padding: 4rem 1.5rem;
  max-width: 640px;
  margin: 0 auto;
}

.cta-block h2 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.3px;
  margin-bottom: 0.75rem;
}

.cta-block p {
  color: var(--muted);
  margin-bottom: 1.8rem;
  font-size: 1rem;
}

.btn-primary {
  display: inline-block;
  background: var(--blue);
  color: #fff;
  text-decoration: none;
  padding: 0.9rem 2.2rem;
  border-radius: var(--radius);
  font-size: 1.05rem;
  font-weight: 700;
  transition: background 0.15s;
}

.btn-primary:hover { background: var(--blue-dark); }

/* ── Footer ──────────────────────────────────────────────── */

footer {
  background: #1a1a1a;
  color: #999;
  text-align: center;
  padding: 1.2rem;
  font-size: 0.8rem;
}

footer a { color: #bbb; text-decoration: underline; }

/* ── Responsive ──────────────────────────────────────────── */

@media (max-width: 600px) {
  .page-banner { padding: 2rem 1.2rem 1.8rem; }
  .section { padding: 2.5rem 1.2rem; }
  nav { display: none; }
  .output-grid { grid-template-columns: 1fr; }
  .cta-block { padding: 3rem 1.2rem; }
  .cta-block h2 { font-size: 1.4rem; }
}