/* ============================================================
   Setu landing page — light blue theme
   Self-contained, no build step. Served statically by nginx.
   ============================================================ */

:root {
  /* Light blue palette */
  --sky-50:  #f0f9ff;
  --sky-100: #e0f2fe;
  --sky-200: #bae6fd;
  --sky-300: #7dd3fc;
  --sky-400: #38bdf8;
  --sky-500: #0ea5e9;
  --sky-600: #0284c7;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;

  --ink:      #0f172a;
  --ink-soft: #334155;
  --ink-mut:  #64748b;
  --line:     #e2e8f0;
  --white:    #ffffff;

  --radius:   16px;
  --radius-sm: 10px;
  --shadow:   0 1px 2px rgba(15,23,42,.04), 0 12px 32px rgba(2,132,199,.08);
  --shadow-lg: 0 20px 50px rgba(2,132,199,.16);
  --maxw:     1120px;
  --ease:     cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { line-height: 1.15; margin: 0; letter-spacing: -0.02em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }

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

.accent { color: var(--blue-600); }
.accent-light { color: var(--sky-200); }

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--sky-500), var(--blue-600));
  color: var(--white);
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 999px;
  border: none; cursor: pointer;
  box-shadow: 0 8px 20px rgba(37,99,235,.28);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), opacity .2s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(37,99,235,.34); }
.btn:active { transform: translateY(0); }
.btn-sm { padding: 9px 18px; font-size: .92rem; }
.btn-lg { padding: 15px 30px; font-size: 1.05rem; }
.btn-ghost {
  background: transparent;
  color: var(--blue-700);
  box-shadow: inset 0 0 0 1.5px var(--sky-200);
}
.btn-ghost:hover { background: var(--sky-50); box-shadow: inset 0 0 0 1.5px var(--sky-300); }

/* ---------------- Header ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { display: inline-flex; }
.brand-name {
  font-weight: 800; font-size: 1.5rem; letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--sky-500), var(--blue-700));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.nav { display: flex; align-items: center; gap: 28px; }
.nav a { color: var(--ink-soft); font-weight: 500; font-size: .96rem; transition: color .15s; }
.nav a:hover { color: var(--blue-600); }
.nav .btn { color: var(--white); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--ink); border-radius: 2px; transition: .25s var(--ease); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav { display: none; flex-direction: column; padding: 8px 24px 16px; border-bottom: 1px solid var(--line); background: var(--white); }
.mobile-nav a { padding: 12px 0; color: var(--ink-soft); font-weight: 500; border-top: 1px solid var(--line); }
.mobile-nav.open { display: flex; }

/* ---------------- Hero ---------------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1100px 520px at 78% -8%, var(--sky-100), transparent 60%),
    radial-gradient(900px 480px at 8% 8%, #eff6ff, transparent 55%),
    linear-gradient(180deg, var(--sky-50), var(--white));
}
.hero-inner { padding: 96px 24px 88px; text-align: center; max-width: 920px; }
.eyebrow {
  display: inline-block;
  font-size: .8rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--sky-600);
  background: var(--sky-100);
  padding: 7px 14px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 { font-size: clamp(2.1rem, 5.4vw, 3.6rem); font-weight: 800; }
.lede { font-size: clamp(1.05rem, 2vw, 1.28rem); color: var(--ink-soft); margin: 22px auto 0; max-width: 720px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 34px; }

.hero-stats { display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; margin-top: 56px; }
.stat {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 28px; min-width: 180px;
  box-shadow: var(--shadow);
}
.stat-num { display: block; font-size: 1.9rem; font-weight: 800; color: var(--blue-600); letter-spacing: -0.03em; }
.stat-label { display: block; font-size: .9rem; color: var(--ink-mut); margin-top: 4px; }

/* ---------------- Sections ---------------- */
.section { padding: 88px 0; }
.section-tint { background: linear-gradient(180deg, var(--sky-50), var(--white)); }
.section-head { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.kicker {
  font-size: .8rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--sky-600); margin-bottom: 14px;
}
.kicker-light { color: var(--sky-200); }
.section-head h2 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); font-weight: 800; }
.section-sub { color: var(--ink-soft); font-size: 1.08rem; margin-top: 16px; }

/* ---------------- Grids ---------------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--sky-200); }
.card-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: grid; place-items: center; font-size: 1.4rem;
  background: var(--sky-100); margin-bottom: 16px;
}
.card h3 { font-size: 1.18rem; font-weight: 700; margin-bottom: 8px; }
.card p { color: var(--ink-soft); font-size: .98rem; }

/* feature variant */
.feature {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature h3 { display: flex; align-items: center; gap: 10px; font-size: 1.12rem; font-weight: 700; margin-bottom: 8px; }
.feature p { color: var(--ink-soft); font-size: .98rem; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: linear-gradient(135deg, var(--sky-400), var(--blue-600)); flex: none; }

/* list cards */
.list-card {
  background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px 30px; box-shadow: var(--shadow);
}
.check-list { list-style: none; margin: 0; padding: 0; }
.check-list li { position: relative; padding: 12px 0 12px 36px; color: var(--ink-soft); border-top: 1px solid var(--line); }
.check-list li:first-child { border-top: none; }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 16px;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--sky-100) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%230284c7' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / 14px no-repeat;
}

/* ---------------- Market band ---------------- */
.market {
  background:
    radial-gradient(800px 400px at 80% 0%, rgba(56,189,248,.25), transparent 60%),
    linear-gradient(135deg, var(--blue-700), var(--sky-600));
  color: var(--white);
}
.market-inner { text-align: center; max-width: 820px; margin: 0 auto; }
.market-head { font-size: clamp(1.8rem, 4.4vw, 3rem); font-weight: 800; margin-top: 8px; }
.market-sub { color: rgba(255,255,255,.86); font-size: 1.12rem; margin-top: 20px; }

/* ---------------- Vision ---------------- */
.vision-inner { text-align: center; max-width: 800px; margin: 0 auto; }
.vision h2 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); font-weight: 800; margin-top: 8px; }
.vision-text { color: var(--ink-soft); font-size: 1.14rem; margin-top: 18px; }

/* ---------------- Contact ---------------- */
.contact { background: linear-gradient(180deg, var(--white), var(--sky-50)); }
.contact-inner { text-align: center; max-width: 660px; margin: 0 auto; }
.contact h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; }
.contact p { color: var(--ink-soft); font-size: 1.1rem; margin-top: 14px; }
.contact .btn { margin-top: 28px; }
.contact-email { font-size: .96rem; margin-top: 18px; }
.contact-email a { color: var(--blue-600); font-weight: 600; }

/* ---------------- Footer ---------------- */
.site-footer { border-top: 1px solid var(--line); padding: 44px 0; background: var(--white); }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 24px; flex-wrap: wrap; }
.footer-brand p { color: var(--ink-mut); font-size: .95rem; margin-top: 6px; max-width: 320px; }
.footer-meta { text-align: right; }
.footer-meta p { font-size: .95rem; }
.footer-meta .muted { color: var(--ink-mut); margin-top: 4px; }

/* ---------------- Reveal animation ---------------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------------- Responsive ---------------- */
@media (max-width: 860px) {
  .nav { display: none; }
  .nav-toggle { display: flex; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .hero-inner { padding: 72px 24px 64px; }
  .footer-inner { flex-direction: column; }
  .footer-meta { text-align: left; }
  .hero-stats .stat { min-width: 0; flex: 1 1 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .btn:hover, .card:hover, .feature:hover { transform: none; }
}