@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  --bg-primary:    #07101f;
  --bg-secondary:  #0c1829;
  --bg-card:       #101e30;
  --bg-card-hover: #142236;
  --border:        #1a2e44;
  --border-light:  #243d58;
  --cyan:          #22d3ee;
  --cyan-dim:      rgba(34, 211, 238, 0.12);
  --cyan-glow:     rgba(34, 211, 238, 0.25);
  --purple:        #a78bfa;
  --purple-dim:    rgba(167, 139, 250, 0.12);
  --green:         #34d399;
  --text:          #f0f6ff;
  --text-secondary:#94a3b8;
  --text-muted:    #4e6a85;
  --radius:        10px;
  --radius-lg:     16px;
  --shadow:        0 4px 24px rgba(0,0,0,0.4);
  --transition:    0.2s ease;
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── Typography ─────────────────────────────────────────────── */
h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; line-height: 1.1; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); font-weight: 700; line-height: 1.2; }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1.05rem; font-weight: 600; }
p  { color: var(--text-secondary); }
.mono { font-family: 'JetBrains Mono', monospace; }

/* ── Utility ────────────────────────────────────────────────── */
.container  { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.section    { padding: 88px 0; }
.section-sm { padding: 56px 0; }
.text-center { text-align: center; }
.text-cyan   { color: var(--cyan); }
.text-purple { color: var(--purple); }
.text-muted  { color: var(--text-muted); }

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: 100px;
  font-size: 0.78rem; font-weight: 600; letter-spacing: .04em;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.badge-cyan   { border-color: var(--cyan); color: var(--cyan); background: var(--cyan-dim); }
.badge-purple { border-color: var(--purple); color: var(--purple); background: var(--purple-dim); }

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: var(--radius);
  font-size: 0.9rem; font-weight: 600;
  border: none; cursor: pointer;
  transition: var(--transition); white-space: nowrap;
}
.btn-primary {
  background: var(--cyan); color: #07101f;
}
.btn-primary:hover { background: #67e8f9; transform: translateY(-1px); }

.btn-outline {
  background: transparent; color: var(--text);
  border: 1px solid var(--border-light);
}
.btn-outline:hover { border-color: var(--cyan); color: var(--cyan); }

.btn-ghost {
  background: transparent; color: var(--text-secondary); padding: 12px 16px;
}
.btn-ghost:hover { color: var(--cyan); }

.btn-lg { padding: 15px 32px; font-size: 1rem; }
.btn-sm { padding: 8px 16px; font-size: 0.82rem; }

/* ── Navigation ─────────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(7, 16, 31, 0.92);
  backdrop-filter: blur(12px);
}
.nav-inner {
  display: flex; align-items: center; gap: 32px;
  height: 64px; padding: 0 24px;
  max-width: 1160px; margin: 0 auto;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.15rem; font-weight: 800;
  flex-shrink: 0;
}
.nav-logo .dot { color: var(--cyan); }
.nav-logo-icon {
  width: 32px; height: 32px;
  background: var(--cyan-dim);
  border: 1px solid var(--cyan);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem;
}
.nav-links {
  display: flex; align-items: center; gap: 4px; flex: 1;
}
.nav-links a {
  padding: 6px 12px; border-radius: 7px;
  font-size: 0.875rem; font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--bg-card); }
.nav-cta { margin-left: auto; }

.nav-hamburger {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; padding: 4px; margin-left: auto;
  background: none; border: none;
}
.nav-hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: var(--transition);
}

.nav-mobile {
  display: none;
  position: absolute; top: 64px; left: 0; right: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px; flex-direction: column; gap: 4px;
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  padding: 10px 12px; border-radius: 7px;
  font-size: 0.9rem; font-weight: 500; color: var(--text-secondary);
  transition: var(--transition);
}
.nav-mobile a:hover { color: var(--text); background: var(--bg-card); }
.nav-mobile .btn { margin-top: 8px; justify-content: center; }

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
}

/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  padding: 96px 0 80px;
  position: relative; overflow: hidden;
  text-align: center;
}
.hero::before {
  content: '';
  position: absolute; top: -40%; left: 50%; transform: translateX(-50%);
  width: 900px; height: 600px; border-radius: 50%;
  background: radial-gradient(ellipse, rgba(34,211,238,.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-eyebrow { margin-bottom: 20px; }
.hero-title   { margin-bottom: 20px; }
.hero-title span { color: var(--cyan); }
.hero-sub {
  font-size: 1.15rem; max-width: 600px;
  margin: 0 auto 36px; color: var(--text-secondary);
}
.hero-actions { display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap; }
.hero-stats {
  display: flex; justify-content: center; gap: 48px;
  margin-top: 72px; flex-wrap: wrap;
}
.hero-stat-value {
  font-size: 2rem; font-weight: 800; color: var(--cyan);
  line-height: 1;
}
.hero-stat-label { font-size: 0.82rem; color: var(--text-muted); margin-top: 4px; }

/* ── Section Headers ─────────────────────────────────────────── */
.section-header { margin-bottom: 48px; }
.section-header p { margin-top: 12px; max-width: 560px; }
.section-header.centered { text-align: center; }
.section-header.centered p { margin: 12px auto 0; }

/* ── Cards ───────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}
.card:hover { border-color: var(--border-light); transform: translateY(-2px); }
.card-icon {
  width: 44px; height: 44px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; margin-bottom: 16px;
  background: var(--cyan-dim); border: 1px solid rgba(34,211,238,.2);
}
.card-icon.purple { background: var(--purple-dim); border-color: rgba(167,139,250,.2); }
.card-icon.green  { background: rgba(52,211,153,.1); border-color: rgba(52,211,153,.2); }
.card h3 { margin-bottom: 8px; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 580px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* ── Dataset Card ────────────────────────────────────────────── */
.dataset-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
  display: flex; flex-direction: column; gap: 14px;
}
.dataset-card:hover { border-color: var(--cyan); box-shadow: 0 0 0 1px var(--cyan-glow); }
.dataset-card-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.dataset-card-title  { font-size: 1rem; font-weight: 600; }
.dataset-price       { color: var(--cyan); font-weight: 700; font-size: 1rem; white-space: nowrap; }
.dataset-card p      { font-size: 0.875rem; }
.dataset-tags        { display: flex; flex-wrap: wrap; gap: 6px; }
.dataset-tag {
  font-size: 0.75rem; font-weight: 500; padding: 3px 10px;
  border-radius: 100px; background: var(--bg-secondary);
  border: 1px solid var(--border); color: var(--text-secondary);
}
.dataset-meta {
  display: flex; gap: 16px; font-size: 0.8rem;
  color: var(--text-muted); border-top: 1px solid var(--border);
  padding-top: 14px;
}
.dataset-meta span { display: flex; align-items: center; gap: 5px; }

/* ── Steps ───────────────────────────────────────────────────── */
.steps { display: flex; flex-direction: column; gap: 0; }
.step  {
  display: flex; gap: 24px; align-items: flex-start;
  padding: 28px 0; border-bottom: 1px solid var(--border);
}
.step:last-child { border-bottom: none; }
.step-num {
  width: 40px; height: 40px; flex-shrink: 0;
  border-radius: 50%; border: 1px solid var(--cyan);
  background: var(--cyan-dim); color: var(--cyan);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.9rem;
}
.step-content h3 { margin-bottom: 6px; }

/* ── Forms ───────────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; }
.form-row    { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
label { font-size: 0.85rem; font-weight: 500; color: var(--text-secondary); }
input, textarea, select {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  color: var(--text); font-family: inherit;
  font-size: 0.9rem; width: 100%;
  transition: var(--transition);
}
input:focus, textarea:focus, select:focus {
  outline: none; border-color: var(--cyan);
  box-shadow: 0 0 0 3px var(--cyan-dim);
}
input::placeholder, textarea::placeholder { color: var(--text-muted); }
textarea { resize: vertical; min-height: 120px; }
select option { background: var(--bg-secondary); }

@media (max-width: 580px) { .form-row { grid-template-columns: 1fr; } }

/* ── Table ───────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td {
  padding: 12px 16px; text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}
th { color: var(--text-muted); font-weight: 500; font-size: 0.78rem; text-transform: uppercase; letter-spacing: .06em; }
td { color: var(--text-secondary); }
tr:hover td { background: var(--bg-card); }

/* ── Page Hero (inner pages) ─────────────────────────────────── */
.page-hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--border);
}
.page-hero .badge { margin-bottom: 12px; }
.page-hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); margin-bottom: 12px; }
.page-hero p   { font-size: 1.05rem; max-width: 540px; }

/* ── CTA Band ────────────────────────────────────────────────── */
.cta-band {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 56px; text-align: center;
  position: relative; overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--cyan-dim), transparent 70%);
  pointer-events: none;
}
.cta-band h2 { margin-bottom: 12px; }
.cta-band p  { margin-bottom: 28px; }
.cta-band-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* ── Footer ──────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
  margin-top: 0;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 48px;
}
.footer-brand p { font-size: 0.875rem; margin-top: 12px; max-width: 280px; }
.footer-col h4  { font-size: 0.8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); margin-bottom: 16px; }
.footer-col ul  { display: flex; flex-direction: column; gap: 10px; }
.footer-col a   { font-size: 0.875rem; color: var(--text-secondary); transition: var(--transition); }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom  { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding-top: 24px; border-top: 1px solid var(--border); }
.footer-bottom p { font-size: 0.82rem; color: var(--text-muted); }

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ── Divider ─────────────────────────────────────────────────── */
.divider { border: none; border-top: 1px solid var(--border); }

/* ── Alert / Toast ───────────────────────────────────────────── */
.alert {
  padding: 14px 18px; border-radius: var(--radius);
  font-size: 0.875rem; font-weight: 500;
  display: flex; align-items: center; gap: 10px;
}
.alert-success { background: rgba(52,211,153,.12); border: 1px solid rgba(52,211,153,.3); color: var(--green); }
.alert-error   { background: rgba(248,113,113,.1); border: 1px solid rgba(248,113,113,.3); color: #f87171; }

/* ── Misc ────────────────────────────────────────────────────── */
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px; border-radius: 100px; font-size: 0.78rem; font-weight: 600;
}
.pill-green  { background: rgba(52,211,153,.12); color: var(--green); }
.pill-cyan   { background: var(--cyan-dim); color: var(--cyan); }
.pill-purple { background: var(--purple-dim); color: var(--purple); }
.pill-gray   { background: var(--bg-card); color: var(--text-muted); border: 1px solid var(--border); }