/* ----------------------------------------------------------------
   Tidy Index — landing styles
   Palette: whites, soft blues, generous space.
---------------------------------------------------------------- */

:root {
  --c-bg:           #ffffff;
  --c-bg-soft:      #f6f9fc;
  --c-bg-tint:      #eef4fb;
  --c-border:       #e3ecf5;
  --c-border-soft:  #eef2f7;

  --c-ink:          #0b1f3a;
  --c-ink-soft:     #3b4f6b;
  --c-ink-mute:     #6b7c93;

  --c-blue:         #3b82f6;
  --c-blue-deep:    #2563eb;
  --c-blue-soft:    #dbeafe;
  --c-blue-tint:    #eef4ff;

  --c-accent:       #60a5fa;

  --shadow-sm:      0 1px 2px rgba(15, 38, 73, 0.04);
  --shadow-md:      0 6px 24px -8px rgba(37, 99, 235, 0.18),
                    0 2px 6px rgba(15, 38, 73, 0.04);
  --shadow-lg:      0 24px 60px -20px rgba(37, 99, 235, 0.25),
                    0 6px 16px rgba(15, 38, 73, 0.06);

  --radius-sm:      8px;
  --radius-md:      14px;
  --radius-lg:      22px;

  --font-sans:      'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
                    Helvetica, Arial, sans-serif;
  --font-mono:      'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo,
                    Consolas, monospace;

  --max-w:          1120px;
  --max-w-narrow:   760px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--c-ink);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, var(--c-blue-tint), transparent 70%),
    radial-gradient(ellipse 60% 40% at 90% 10%, #f0f7ff, transparent 70%);
  background-repeat: no-repeat;
}

a {
  color: var(--c-blue-deep);
  text-decoration: none;
  transition: color 160ms ease;
}
a:hover { color: var(--c-blue); }

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

/* ---------- layout helpers ---------- */

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.container.narrow { max-width: var(--max-w-narrow); }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-blue-deep);
  background: var(--c-blue-tint);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--c-blue-soft);
}
.eyebrow.center { display: inline-block; }

.center { text-align: center; }
.center.eyebrow { display: inline-block; }

.section {
  padding: 120px 0;
}

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

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 18px 0 18px;
  color: var(--c-ink);
}
.section-title.center { text-align: center; max-width: 720px; margin-left: auto; margin-right: auto; }

.section-lede {
  font-size: 19px;
  color: var(--c-ink-soft);
  max-width: 640px;
  margin: 0 auto 60px;
  line-height: 1.6;
}
.section-lede.center { text-align: center; }

/* center the eyebrow when wrapped */
.section .eyebrow.center,
.container .eyebrow.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: max-content;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--c-border-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 17px;
  color: var(--c-ink);
  letter-spacing: -0.01em;
}
.brand:hover { color: var(--c-blue-deep); }

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  color: var(--c-blue-deep);
  background: var(--c-blue-tint);
  border-radius: 9px;
  border: 1px solid var(--c-blue-soft);
}
.brand-mark svg { width: 20px; height: 20px; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.site-nav a {
  color: var(--c-ink-soft);
  font-size: 15px;
  font-weight: 500;
}
.site-nav a:hover { color: var(--c-blue-deep); }

.nav-cta {
  background: var(--c-ink);
  color: #fff !important;
  padding: 9px 16px;
  border-radius: 999px;
  transition: transform 160ms ease, background 160ms ease;
}
.nav-cta:hover {
  background: var(--c-blue-deep);
  transform: translateY(-1px);
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-size: 16px;
  font-weight: 500;
  padding: 14px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 180ms ease;
  letter-spacing: -0.005em;
}

.btn-primary {
  background: var(--c-blue-deep);
  color: #fff;
  box-shadow: 0 6px 18px -6px rgba(37, 99, 235, 0.5);
}
.btn-primary:hover {
  background: #1d4ed8;
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 10px 24px -8px rgba(37, 99, 235, 0.55);
}

.btn-ghost {
  background: transparent;
  color: var(--c-ink);
  border-color: var(--c-border);
}
.btn-ghost:hover {
  background: #fff;
  border-color: var(--c-blue-soft);
  color: var(--c-blue-deep);
}

.btn-lg {
  padding: 16px 30px;
  font-size: 16px;
}

/* ---------- hero ---------- */

.hero {
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  text-align: center;
  position: relative;
}

.hero .eyebrow {
  margin-bottom: 28px;
}

.hero-title {
  font-size: clamp(40px, 6vw, 76px);
  line-height: 1.05;
  font-weight: 600;
  letter-spacing: -0.035em;
  margin: 0 auto 24px;
  max-width: 12ch;
  color: var(--c-ink);
}

.hero-title .accent {
  background: linear-gradient(120deg, var(--c-blue-deep), var(--c-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: 20px;
  line-height: 1.55;
  color: var(--c-ink-soft);
  max-width: 600px;
  margin: 0 auto 40px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 80px;
}

/* ---------- code card ---------- */

.hero-visual {
  display: flex;
  justify-content: center;
  margin-top: 16px;
}

.code-card {
  width: 100%;
  max-width: 640px;
  background: #ffffff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  text-align: left;
  position: relative;
}

.code-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(160deg, rgba(96,165,250,0.4), rgba(255,255,255,0) 60%);
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}

.code-card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background: var(--c-bg-soft);
  border-bottom: 1px solid var(--c-border-soft);
}

.code-card-head .dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: #d6dde7;
}
.dot-a { background: #ffd1d1; }
.dot-b { background: #ffe5b4; }
.dot-c { background: #c8e6c9; }

.code-card-title {
  margin-left: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-ink-mute);
}

.code-card-body {
  margin: 0;
  padding: 22px 24px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--c-ink-soft);
  background: #ffffff;
  overflow-x: auto;
  white-space: pre;
}
.code-card-body code { font-family: inherit; }

.tk-k { color: #2563eb; }
.tk-s { color: #0f766e; }
.tk-n { color: #b45309; }
.tk-p { color: #94a3b8; }

/* ---------- format grid ---------- */

.format-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.format-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  box-shadow: var(--shadow-sm);
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}

.format-card:hover {
  transform: translateY(-3px);
  border-color: var(--c-blue-soft);
  box-shadow: var(--shadow-md);
}

.format-icon {
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--c-blue-tint);
  color: var(--c-blue-deep);
  margin-bottom: 18px;
}
.format-icon svg { width: 22px; height: 22px; }

.format-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.format-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--c-ink-mute);
}

/* ---------- audience grid ---------- */

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 20px;
}

.audience-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-sm);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.audience-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.audience-card-feature {
  background: linear-gradient(180deg, #ffffff 0%, var(--c-blue-tint) 130%);
  border-color: var(--c-blue-soft);
}

.audience-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--c-blue-deep);
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.audience-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--c-ink);
}

.audience-card p {
  margin: 0;
  color: var(--c-ink-soft);
  font-size: 16px;
  line-height: 1.6;
}

/* ---------- value list ---------- */

.value-list {
  list-style: none;
  padding: 0;
  margin: 40px 0 0;
  display: grid;
  gap: 22px;
}

.value-list li {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  box-shadow: var(--shadow-sm);
}

.value-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  border-radius: 50%;
  background: var(--c-blue-tint);
  color: var(--c-blue-deep);
}
.value-check svg { width: 18px; height: 18px; }

.value-list strong {
  display: block;
  font-weight: 600;
  font-size: 17px;
  color: var(--c-ink);
  margin-bottom: 4px;
}

.value-list p {
  margin: 0;
  color: var(--c-ink-mute);
  font-size: 15.5px;
  line-height: 1.55;
}

/* ---------- CTA card ---------- */

.cta-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: linear-gradient(160deg, #ffffff 0%, var(--c-blue-tint) 100%);
  border: 1px solid var(--c-blue-soft);
  border-radius: var(--radius-lg);
  padding: 72px 40px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.cta-glow {
  position: absolute;
  top: -120px;
  left: 50%;
  width: 360px;
  height: 360px;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, rgba(96, 165, 250, 0.35), rgba(96, 165, 250, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

.cta-title {
  position: relative;
  z-index: 1;
  margin: 0 0 28px;
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--c-ink);
  text-align: center;
}

.cta-btn {
  position: relative;
  z-index: 1;
  gap: 10px;
}

.cta-btn svg {
  width: 18px;
  height: 18px;
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--c-border-soft);
  background: var(--c-bg);
  padding: 60px 0 50px;
}

.footer-inner {
  text-align: center;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 14px;
}
.footer-brand .brand-mark { color: var(--c-blue-deep); }
.footer-brand .brand-mark svg { width: 20px; height: 20px; }

.footer-tagline {
  margin: 0 0 12px;
  color: var(--c-ink-soft);
  font-size: 15px;
}

.footer-meta {
  margin: 0;
  color: var(--c-ink-mute);
  font-size: 13px;
}

/* ---------- responsive ---------- */

@media (max-width: 880px) {
  .format-grid { grid-template-columns: repeat(2, 1fr); }
  .audience-grid { grid-template-columns: 1fr; }
  .section { padding: 90px 0; }
  .hero { padding: 80px 0 40px; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .site-nav { gap: 18px; }
  .site-nav a:not(.nav-cta) { display: none; }
  .header-inner { height: 64px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }
  .code-card-body { font-size: 12px; padding: 18px; }
  .format-grid { grid-template-columns: 1fr; }
  .cta-card { padding: 40px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}
