/* ============================================
   Synapse — AI Template Studio (Light Mode)
   ============================================ */

:root {
  --bg: #f6f7f5;
  --bg-alt: #eef1ee;
  --surface: #ffffff;
  --surface-border: #dde3de;
  --ink: #10201c;
  --ink-soft: #4b5a54;
  --ink-faint: #7c8b84;
  --teal: #0f9d8e;
  --teal-dark: #0b7e72;
  --teal-pale: #e3f5f1;
  --accent-line: #0f9d8e;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-card: 0 1px 2px rgba(16, 32, 28, 0.04), 0 8px 24px -12px rgba(16, 32, 28, 0.10);
  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

sup { font-size: 0.65em; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
  margin: 0;
  letter-spacing: -0.01em;
}

/* ---------- Eyebrow ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal-dark);
  background: var(--teal-pale);
  border: 1px solid rgba(15, 157, 142, 0.25);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}
.eyebrow-dot { font-size: 10px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  padding: 13px 24px;
  border-radius: 100px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--teal);
  color: #ffffff;
  box-shadow: 0 6px 16px -6px rgba(15, 157, 142, 0.55);
}
.btn-primary:hover { background: var(--teal-dark); }

.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--surface-border);
}
.btn-outline:hover { border-color: var(--teal); color: var(--teal-dark); }

.btn-small {
  padding: 10px 20px;
  font-size: 14px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(246, 247, 245, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--surface-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}
.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
}
.main-nav {
  display: flex;
  gap: 36px;
}
.main-nav a {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color 0.15s ease;
}
.main-nav a:hover { color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  padding: 72px 0 64px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: start;
}
.hero h1 {
  font-size: 46px;
  line-height: 1.12;
  margin-bottom: 22px;
}
.highlight {
  background: linear-gradient(100deg, #0aab98, #0f9d8e 55%, #14b8a6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lede {
  font-size: 16.5px;
  color: var(--ink-soft);
  max-width: 500px;
  margin-bottom: 30px;
}
.hero-ctas {
  display: flex;
  gap: 14px;
  margin-bottom: 44px;
}
.hero-stats {
  display: flex;
  gap: 48px;
}
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-num {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  color: var(--teal-dark);
}
.stat-label {
  font-size: 13px;
  color: var(--ink-faint);
  max-width: 140px;
}

/* ---------- Hero mock panel ---------- */
.hero-panel {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.panel-titlebar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--surface-border);
  background: var(--bg-alt);
}
.dot { width: 9px; height: 9px; border-radius: 50%; }
.dot-a { background: #f0625b; }
.dot-b { background: #f4b13f; }
.dot-c { background: #38b06a; }
.panel-title {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
}
.panel-prompt {
  margin: 18px 18px 6px;
  padding: 12px 16px;
  background: var(--teal-pale);
  border: 1px solid rgba(15, 157, 142, 0.25);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--teal-dark);
}
.panel-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 14px 18px 20px;
}
.option-card {
  background: var(--bg);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-sm);
  padding: 12px 12px 14px;
}
.option-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  color: var(--teal-dark);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}
.option-block { margin-bottom: 9px; }
.option-block:last-child { margin-bottom: 0; }
.option-block-label {
  display: block;
  font-size: 9.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin-bottom: 3px;
}
.option-block p {
  margin: 0;
  font-size: 11.5px;
  color: var(--ink);
  line-height: 1.4;
}

/* ---------- Sections ---------- */
.section {
  padding: 72px 0;
}
.section-tinted {
  background: var(--bg-alt);
}
.section h2 {
  font-size: 32px;
  line-height: 1.2;
  max-width: 720px;
  margin-bottom: 18px;
}
.section-lede {
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0 0 44px;
}

/* ---------- Info cards ---------- */
.card-row {
  display: grid;
  gap: 22px;
}
.three-up { grid-template-columns: repeat(3, 1fr); }

.info-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  padding: 26px 24px;
  box-shadow: var(--shadow-card);
}
.info-num, .info-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--teal-dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
}
.info-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}
.info-card p {
  font-size: 14.5px;
  color: var(--ink-soft);
  margin: 0;
}

/* ---------- Quote box ---------- */
.quote-box {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-left: 4px solid var(--teal);
  border-radius: var(--radius-md);
  padding: 26px 28px;
  box-shadow: var(--shadow-card);
}
.quote-tag {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal-dark);
  background: var(--teal-pale);
  padding: 5px 10px;
  border-radius: 100px;
}
.quote-box p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}
.quote-box strong { color: var(--ink); }

/* ---------- Use case cards ---------- */
.usecase-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.usecase-card {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 24px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  padding: 28px 30px;
  box-shadow: var(--shadow-card);
}
.usecase-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal-dark);
  margin-bottom: 10px;
}
.usecase-main h3 {
  font-size: 20px;
  margin-bottom: 12px;
}
.usecase-quote {
  font-style: italic;
  color: var(--ink-soft);
  font-size: 14.5px;
  margin: 0 0 14px;
  padding-left: 14px;
  border-left: 2px solid var(--surface-border);
}
.usecase-points {
  margin: 0;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.usecase-stat {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  gap: 8px;
  border-left: 1px solid var(--surface-border);
  padding-left: 24px;
}
.stat-big {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 700;
  color: var(--teal-dark);
}
.stat-small {
  font-size: 12.5px;
  color: var(--ink-faint);
  line-height: 1.4;
}

/* ---------- Metric row ---------- */
.metric-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  box-shadow: var(--shadow-card);
}
.metric {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
  padding: 0 12px;
}
.metric:not(:last-child) {
  border-right: 1px solid var(--surface-border);
}
.metric-num {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--teal-dark);
}
.metric-label {
  font-size: 13px;
  color: var(--ink-faint);
  max-width: 180px;
}

/* ---------- FAQ ---------- */
.faq-list {
  display: flex;
  flex-direction: column;
}
.faq-item {
  border-bottom: 1px solid var(--surface-border);
  padding: 22px 0;
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-toggle {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--teal-dark);
  flex-shrink: 0;
  margin-left: 20px;
}
.faq-item p {
  margin: 14px 0 0;
  font-size: 14.5px;
  color: var(--ink-soft);
  max-width: 760px;
}

/* ---------- CTA ---------- */
.cta-section {
  background: linear-gradient(160deg, #0b2622 0%, #0f9d8e 120%);
  border-radius: var(--radius-lg);
  max-width: 1180px;
  margin: 0 auto 80px;
  padding: 72px 40px;
}
.cta-inner {
  text-align: center;
  max-width: 700px;
}
.eyebrow-cta {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.3);
  color: #d6fbf3;
}
.cta-section h2 {
  color: #ffffff;
  font-size: 30px;
  margin-bottom: 16px;
  max-width: none;
}
.cta-section p {
  color: rgba(255, 255, 255, 0.82);
  font-size: 16px;
  margin-bottom: 30px;
}
.cta-section .btn-primary {
  background: #ffffff;
  color: var(--teal-dark);
  box-shadow: none;
}
.cta-section .btn-primary:hover {
  background: #eafdf9;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--surface-border);
  padding: 26px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--ink-faint);
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .panel-options { grid-template-columns: 1fr; }
  .three-up { grid-template-columns: 1fr; }
  .usecase-card { grid-template-columns: 1fr; }
  .usecase-stat {
    border-left: none;
    border-top: 1px solid var(--surface-border);
    padding-left: 0;
    padding-top: 16px;
    flex-direction: row;
    align-items: center;
  }
  .metric-row { grid-template-columns: repeat(2, 1fr); row-gap: 28px; }
  .metric:nth-child(2) { border-right: none; }
  .metric:not(:last-child) { border-right: 1px solid var(--surface-border); }
}

@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  .main-nav { display: none; }
  .hero { padding: 44px 0 40px; }
  .hero h1 { font-size: 32px; }
  .hero-ctas { flex-direction: column; }
  .hero-stats { gap: 28px; }
  .section h2 { font-size: 26px; }
  .metric-row { grid-template-columns: 1fr; }
  .metric { border-right: none !important; border-bottom: 1px solid var(--surface-border); padding-bottom: 20px; }
  .metric:last-child { border-bottom: none; }
  .cta-section { padding: 48px 24px; margin-bottom: 48px; }
}