/* IDAI — Design System v1
   Primary: #0B1220 (deep navy-black)
   Accent:  #0EA5E9 (sky)
   Mint:    #5EEAD4 (secondary accent)
   Body:    #F8FAFC
   Gray:    #94A3B8
*/

:root {
  --ink: #0B1220;
  --ink-2: #111827;
  --accent: #0EA5E9;
  --mint: #5EEAD4;
  --gray: #94A3B8;
  --gray-2: #475569;
  --surface: #F8FAFC;
  --surface-2: #EEF2F7;
  --border: #E2E8F0;
  --max: 1200px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 10px 40px rgba(11,18,32,.08);
  --shadow-lg: 0 24px 80px rgba(11,18,32,.18);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--ink);
  background: var(--surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv02", "cv11";
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

h1, h2, h3, h4 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 0.5em 0;
}
h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); letter-spacing: -0.035em; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); letter-spacing: -0.025em; }
h3 { font-size: 1.35rem; }
p  { margin: 0 0 1em 0; color: var(--gray-2); }

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

/* ========== NAV ========== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11,18,32,0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.15rem;
}
.brand svg { width: 28px; height: 28px; }
.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}
.nav-links a {
  color: rgba(255,255,255,0.75);
  font-size: 0.95rem;
  font-weight: 500;
}
.nav-links a:hover { color: #fff; text-decoration: none; }
.nav-links a.cta {
  background: var(--accent);
  color: #fff;
  padding: 9px 18px;
  border-radius: 999px;
  transition: transform .15s ease, background .15s ease;
}
.nav-links a.cta:hover { background: #0284c7; transform: translateY(-1px); }
@media (max-width: 720px) {
  .nav-links a:not(.cta) { display: none; }
}

/* ========== HERO ========== */
.hero {
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(14,165,233,0.35), transparent 60%),
    radial-gradient(900px 500px at 0% 20%, rgba(94,234,212,0.18), transparent 55%),
    linear-gradient(180deg, var(--ink) 0%, #0A1426 100%);
  color: #fff;
  padding: 96px 0 120px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(1000px 500px at 50% 0%, #000 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(1000px 500px at 50% 0%, #000 30%, transparent 70%);
  pointer-events: none;
}
.hero-inner { position: relative; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(14,165,233,0.12);
  color: #7DD3FC;
  border: 1px solid rgba(14,165,233,0.3);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 24px;
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #5EEAD4;
  box-shadow: 0 0 10px #5EEAD4;
}
.hero h1 {
  max-width: 900px;
  color: #fff;
}
.hero h1 .grad {
  background: linear-gradient(90deg, #7DD3FC, #5EEAD4);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lede {
  max-width: 640px;
  color: rgba(255,255,255,0.72);
  font-size: 1.15rem;
  margin-top: 8px;
}
.cta-row {
  display: flex;
  gap: 14px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  transition: transform .15s ease, background .15s ease, border .15s ease;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: #0284c7; transform: translateY(-1px); text-decoration: none; }
.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.2);
}
.btn-ghost:hover { border-color: rgba(255,255,255,0.5); text-decoration: none; }
.btn-dark {
  background: var(--ink);
  color: #fff;
}
.btn-dark:hover { background: var(--ink-2); text-decoration: none; transform: translateY(-1px); }

/* ========== SECTIONS ========== */
.section {
  padding: 96px 0;
}
.section-alt {
  background: var(--surface-2);
}
.section-dark {
  background: var(--ink);
  color: #fff;
}
.section-dark h2 { color: #fff; }
.section-dark p { color: rgba(255,255,255,0.7); }

.kicker {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 12px;
}
.section-head {
  max-width: 720px;
  margin-bottom: 56px;
}
.section-head p {
  font-size: 1.1rem;
}

/* ========== FEATURE GRID ========== */
.grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: #CBD5E1;
}
.card .icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #0284c7);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  margin-bottom: 18px;
}
.card h3 { margin-bottom: 8px; }
.card p { margin-bottom: 0; font-size: 0.98rem; }

.card-dark {
  background: rgba(255,255,255,0.03);
  border-color: rgba(255,255,255,0.08);
}
.card-dark:hover { border-color: rgba(14,165,233,0.5); background: rgba(255,255,255,0.05); }
.card-dark h3 { color: #fff; }
.card-dark p { color: rgba(255,255,255,0.7); }

/* ========== PRICING ========== */
.price-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  align-items: stretch;
}
.price {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
}
.price.featured {
  border-color: var(--accent);
  box-shadow: 0 20px 60px rgba(14,165,233,0.15);
  position: relative;
}
.price.featured::before {
  content: "Most popular";
  position: absolute;
  top: -14px; left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 999px;
  letter-spacing: 0.04em;
}
.price h3 { font-size: 1.1rem; color: var(--gray-2); margin-bottom: 6px; }
.price .amt {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.price .amt .per { font-size: 1rem; font-weight: 500; color: var(--gray); }
.price .desc { color: var(--gray-2); margin: 8px 0 24px; }
.price ul { list-style: none; padding: 0; margin: 0 0 28px 0; flex: 1; }
.price ul li {
  padding: 8px 0;
  padding-left: 28px;
  position: relative;
  color: var(--gray-2);
  font-size: 0.96rem;
}
.price ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 13px;
  width: 16px; height: 16px;
  background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%230EA5E9'><path d='M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z'/></svg>") no-repeat center;
  background-size: contain;
}

/* ========== FOOTER ========== */
.footer {
  background: var(--ink);
  color: rgba(255,255,255,0.6);
  padding: 56px 0 32px;
  font-size: 0.92rem;
}
.footer a { color: rgba(255,255,255,0.8); }
.footer a:hover { color: #fff; text-decoration: none; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 32px;
}
@media (max-width: 720px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
.footer h4 {
  color: #fff;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer ul li { padding: 4px 0; }
.footer-bottom {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  color: rgba(255,255,255,0.4);
  font-size: 0.85rem;
}

/* ========== FORM ========== */
.form {
  max-width: 560px;
  margin: 0 auto;
}
.form label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink);
  margin: 16px 0 6px;
}
.form input, .form textarea, .form select {
  width: 100%;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.form input:focus, .form textarea:focus, .form select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(14,165,233,0.15);
}
.form textarea { min-height: 140px; resize: vertical; }
.form-note { font-size: 0.85rem; color: var(--gray); margin-top: 18px; }

/* ========== MISC ========== */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 28px;
  padding-top: 48px;
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 56px;
}
.stat .n {
  font-size: 2.3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #fff;
  line-height: 1;
}
.stat .l {
  color: rgba(255,255,255,0.55);
  margin-top: 8px;
  font-size: 0.92rem;
}

.two-col {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
}
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }

.code-block {
  background: #0A1426;
  color: #E2E8F0;
  border-radius: var(--radius);
  padding: 22px 24px;
  font-family: 'JetBrains Mono', 'Menlo', ui-monospace, monospace;
  font-size: 0.92rem;
  line-height: 1.7;
  border: 1px solid rgba(255,255,255,0.08);
  overflow-x: auto;
}
.code-block .c-k { color: #7DD3FC; }
.code-block .c-s { color: #5EEAD4; }
.code-block .c-m { color: #64748B; }

.page-hero {
  background: var(--ink);
  color: #fff;
  padding: 72px 0 56px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(800px 300px at 50% 0%, rgba(14,165,233,0.25), transparent 70%);
  pointer-events: none;
}
.page-hero h1 { font-size: clamp(2rem, 4vw, 3rem); color: #fff; position: relative; }
.page-hero p { color: rgba(255,255,255,0.7); max-width: 640px; position: relative; }