@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;700&family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:wght@400;500;600&display=swap");

:root {
  --bg: #f8fafc;
  --paper: #ffffff;
  --ink: #0f172a;
  --muted: #475569;
  --border: #dbe3ee;
  --accent: #0f766e;
  --accent-soft: #ccfbf1;
  --accent-hover: #0d655b;
  --sans: "IBM Plex Sans", "Segoe UI", sans-serif;
  --serif: "Fraunces", "Times New Roman", serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(circle at 10% 10%, #d9f8f2 0%, transparent 35%),
    radial-gradient(circle at 95% 0%, #dbeafe 0%, transparent 30%),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.7;
}

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

/* ── Top bar ── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.topbar-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  text-decoration: none;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.brand-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #0891b2);
  display: inline-block;
}

.nav-links { display: flex; align-items: center; gap: 18px; }

.util {
  text-decoration: none;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}
.util:hover { color: var(--ink); }

/* ── Layout ── */
.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 20px 90px;
}

section {
  margin-top: 28px;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px;
  background: var(--paper);
}

/* ── Hero ── */
.hero {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: linear-gradient(180deg, #ffffff 0%, #f9fffe 100%);
  padding: 40px 28px;
  text-align: center;
}

.kicker {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
  color: var(--accent);
  font-weight: 500;
}

h1 {
  margin: 14px 0 12px;
  font-family: var(--serif);
  font-size: clamp(32px, 5.5vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.hero-sub {
  margin: 0 auto 20px;
  max-width: 620px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.6;
}

.trust {
  margin: 18px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}

/* ── Buttons ── */
.btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  text-decoration: none;
  border-radius: 9px;
  border: 1px solid transparent;
  padding: 10px 18px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.88; }

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #0891b2);
  color: #ffffff;
}

.btn-secondary {
  border-color: var(--border);
  color: var(--ink);
  background: #ffffff;
}

/* ── Typography ── */
h2 {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.1;
}

.subhead {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 16px;
}

/* ── Grid ── */
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

/* ── Cards ── */
.card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  background: #fff;
}

.card h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.card ul {
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 14px;
}

.card ul li { margin-bottom: 3px; }

.card-icon {
  font-size: 28px;
  margin-bottom: 8px;
  display: block;
}

.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 999px;
  margin-bottom: 8px;
  background: var(--accent-soft);
  color: var(--accent);
}

/* ── Pain points ── */
.pain-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  background: #fffbf5;
}

.pain-card h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
  color: #92400e;
}

.pain-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

/* ── Tabs (demos) ── */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 16px;
}

.tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  padding: 8px 16px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.tab-btn:hover { color: var(--ink); }

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 500;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.demo-block {
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fafcfe;
  overflow: hidden;
}

.demo-prompt {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  background: #fff;
}

.demo-prompt .cmd {
  color: var(--accent);
  font-weight: 500;
}

.demo-output {
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: #334155;
}

.demo-output strong { color: var(--ink); }

/* ── Chat demo bubbles ── */
.chat-demo {
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #f1f5f9;
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.chat-msg {
  display: flex;
  flex-direction: column;
  max-width: 85%;
}

.chat-msg.user {
  align-self: flex-end;
  align-items: flex-end;
}

.chat-msg.agent {
  align-self: flex-start;
  align-items: flex-start;
}

.chat-label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 4px;
  padding: 0 4px;
}

.chat-bubble {
  border-radius: 14px;
  padding: 12px 16px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
}

.chat-msg.user .chat-bubble {
  background: #dbeafe;
  border-bottom-right-radius: 4px;
}

.chat-msg.agent .chat-bubble {
  background: #ffffff;
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.chat-avatar {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #0891b2);
  display: inline-block;
  margin-right: 4px;
  vertical-align: middle;
}

.chat-bubble strong { color: var(--ink); }

/* ── Channel strip ── */
.channel-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 14px;
}

.channel-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ch-color, var(--accent));
  background: color-mix(in srgb, var(--ch-color, var(--accent)) 8%, white);
  border: 1.5px solid color-mix(in srgb, var(--ch-color, var(--accent)) 20%, transparent);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  cursor: default;
}
.channel-badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--ch-color, var(--accent)) 20%, transparent);
}
.channel-badge svg { flex-shrink: 0; }

/* ── Steps ── */
.steps { counter-reset: step; }

.step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 14px 0;
}

.step + .step { border-top: 1px solid var(--border); }

.step-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-body h3 {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 600;
}

.step-body p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.step-code {
  margin: 8px 0 0;
  padding: 10px 14px;
  border-radius: 8px;
  background: #0f172a;
  color: #e2e8f0;
  font-family: var(--mono);
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.copy-btn {
  background: none;
  border: 1px solid #334155;
  border-radius: 5px;
  color: #94a3b8;
  font-family: var(--mono);
  font-size: 11px;
  padding: 3px 8px;
  cursor: pointer;
  flex-shrink: 0;
  transition: color 0.15s, border-color 0.15s;
}

.copy-btn:hover {
  color: #e2e8f0;
  border-color: #64748b;
}

/* ── Providers ── */
.provider-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.provider-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 13px;
  background: #fff;
  color: var(--ink);
}

/* ── FAQ ── */
.faq-item {
  padding: 14px 0;
}

.faq-item + .faq-item { border-top: 1px solid var(--border); }

.faq-q {
  margin: 0 0 4px;
  font-weight: 600;
  font-size: 15px;
}

.faq-a {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

/* ── Footer ── */
.footer-cta {
  text-align: center;
  padding: 36px 24px;
}

.footer-cta h2 {
  margin-bottom: 12px;
}

.footer-cta p {
  color: var(--muted);
  margin: 0 0 18px;
}

footer {
  margin-top: 24px;
  padding: 16px 0;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

/* ── Dev nav ── */
.dev-nav {
  margin-top: 28px;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  background: var(--paper);
}

.dev-nav h2 {
  font-size: 20px;
  margin-bottom: 14px;
}

.dev-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.dev-nav li a {
  display: block;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  transition: border-color 0.15s, background 0.15s;
}

.dev-nav li a:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.dev-nav li a span {
  display: block;
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
  margin-top: 2px;
}

/* ── Responsive ── */
@media (max-width: 760px) {
  .grid, .grid-3 { grid-template-columns: 1fr; }
  .hero { padding: 28px 18px; }
  section { padding: 20px 16px; }
  .step { flex-direction: column; gap: 8px; }
  .chat-msg { max-width: 95%; }
  .channel-strip { gap: 8px; }
  .channel-badge { padding: 8px 14px; font-size: 13px; }
  .channel-badge svg { width: 16px; height: 16px; }
  [style*="grid-template-columns:1fr 1fr"] { grid-template-columns: 1fr !important; }
}