/* =============================================================== */
/* NI Stack Landing Page -- DESTILL.ai Design System               */
/* =============================================================== */
:root {
  --bg: #0a0a0f;
  --bg-card: #12121a;
  --bg-card-hover: #1a1a28;
  --surface: #16162266;
  --border: #ffffff12;
  --border-hover: #ffffff22;
  --text: #e8e8f0;
  --text-muted: #8888aa;
  --text-dim: #555570;
  --accent: #6366f1;
  --accent-glow: #818cf820;
  --accent2: #06d6a0;
  --accent3: #f59e0b;
  --danger: #ef4444;
  --gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #a78bfa);
  --gradient-green: linear-gradient(135deg, #06d6a0, #34d399);
  --radius: 12px;
  --radius-lg: 20px;
  --font: 'Inter', -apple-system, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; transition: all .2s; }
a:hover { color: #a78bfa; }
abbr { text-decoration: none; border-bottom: 1px dotted var(--text-muted); cursor: help; }
code { font-family: var(--mono); background: #1e1e2e; padding: 2px 8px; border-radius: 6px; font-size: .9em; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-label {
  display: inline-block;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-desc { color: var(--text-muted); max-width: 680px; margin: 0 auto 48px; font-size: 1.1rem; }

/* --- NAV ------------------------------------------------------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 32px;
  background: #0a0a0fcc;
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.1rem; color: var(--text); }
.nav-logo-icon { color: var(--accent); font-size: 1.3rem; }
.nav-logo-dot { color: var(--accent); }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--text-muted); font-size: .9rem; font-weight: 500; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  background: var(--gradient); color: #fff !important; padding: 8px 20px;
  border-radius: 8px; font-weight: 600; font-size: .85rem;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 20px #6366f140; }

/* --- BUTTONS --------------------------------------------------- */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--gradient); color: #fff; padding: 14px 32px;
  border-radius: 10px; font-weight: 600; font-size: 1rem;
  transition: all .3s; border: none; cursor: pointer;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px #6366f140; color: #fff; }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--text-muted); padding: 14px 32px; font-weight: 500;
  border: 1px solid var(--border); border-radius: 10px; font-size: 1rem;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn-outline {
  display: block; text-align: center; padding: 12px; border-radius: 8px;
  border: 1px solid var(--border); color: var(--text-muted); font-weight: 500;
  font-size: .9rem; margin-top: auto;
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-large { padding: 18px 40px; font-size: 1.1rem; }

/* --- HERO ------------------------------------------------------ */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 120px 24px 80px; text-align: center; overflow: hidden;
}
.hero-bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 100%);
  opacity: .4;
}
.hero-content { position: relative; z-index: 1; max-width: 900px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--border);
  padding: 8px 20px; border-radius: 100px; font-size: .85rem;
  color: var(--text-muted); margin-bottom: 32px;
}
.badge-pulse {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent2);
  animation: pulse 2s infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .4; } }
.hero-title { font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 800; line-height: 1.15; margin-bottom: 24px; }
.hero-line1 { display: block; color: var(--text-muted); font-size: .65em; font-weight: 500; margin-bottom: 8px; }
.hero-line2 { display: block; }
.hero-highlight {
  background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle { font-size: 1.2rem; color: var(--text-muted); max-width: 680px; margin: 0 auto 40px; }
.hero-stats {
  display: flex; justify-content: center; gap: 32px; flex-wrap: wrap;
  margin-bottom: 40px;
}
.stat { text-align: center; }
.stat-value { display: block; font-size: 2rem; font-weight: 800; color: var(--text); }
.stat-label { font-size: .8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.stat-divider { width: 1px; background: var(--border); align-self: stretch; }
.hero-cta-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }
.hero-code {
  background: #0d0d17; border: 1px solid var(--border); border-radius: var(--radius);
  text-align: left; max-width: 640px; margin: 0 auto; overflow: hidden;
}
.code-header {
  display: flex; align-items: center; gap: 8px; padding: 12px 16px;
  background: #0a0a12; border-bottom: 1px solid var(--border);
}
.code-dot { width: 12px; height: 12px; border-radius: 50%; }
.code-dot.red { background: #ef4444; }
.code-dot.yellow { background: #f59e0b; }
.code-dot.green { background: #22c55e; }
.code-title { margin-left: auto; font-size: .75rem; color: var(--text-dim); }
.hero-code pre { padding: 20px; overflow-x: auto; }
.hero-code code { background: none; padding: 0; font-size: .85rem; line-height: 1.8; }
.code-comment { color: #555570; }
.code-keyword { color: #c084fc; }
.code-class { color: #22d3ee; }
.code-string { color: #34d399; }

/* --- PROBLEM --------------------------------------------------- */
.problem { padding: 120px 0; text-align: center; }
.problem h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); margin-bottom: 48px; max-width: 700px; margin-left: auto; margin-right: auto; }
.problem-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; margin-bottom: 40px; }
.problem-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 24px; text-align: center;
  transition: all .3s;
}
.problem-card:hover { border-color: var(--border-hover); transform: translateY(-3px); }
.problem-icon { font-size: 2rem; display: block; margin-bottom: 12px; }
.problem-value { display: block; font-size: 2.2rem; font-weight: 800; margin-bottom: 8px; }
.problem-desc { font-size: .85rem; color: var(--text-muted); line-height: 1.5; }
.problem-insight {
  max-width: 680px; margin: 0 auto; font-size: 1.05rem; color: var(--text-muted);
  border-left: 3px solid var(--accent); padding-left: 20px; text-align: left;
}

/* --- PRODUCTS -------------------------------------------------- */
.products { padding: 120px 0; text-align: center; }
.products h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); margin-bottom: 16px; }
.products-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.product-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 32px; text-align: left; position: relative;
  transition: all .4s; display: flex; flex-direction: column;
}
.product-card:hover { border-color: #6366f140; transform: translateY(-4px); box-shadow: 0 20px 60px #00000040; }
.product-card.featured { border-color: #6366f160; background: linear-gradient(135deg, #12121a 0%, #1a1530 100%); }
.product-link { position: absolute; inset: 0; z-index: 2; }
.product-punchline {
  font-size: 1rem; font-weight: 700; font-style: italic;
  background: var(--gradient-green); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 4px; line-height: 1.4;
}
.product-badge {
  position: absolute; top: -10px; right: 20px;
  background: var(--gradient); color: #fff; font-size: .7rem; font-weight: 700;
  padding: 4px 12px; border-radius: 6px; text-transform: uppercase; letter-spacing: 1px;
}
.product-number { font-size: .75rem; font-weight: 700; color: var(--accent); margin-bottom: 12px; letter-spacing: 2px; }
.product-card h3 { font-size: 1.15rem; margin-bottom: 4px; }
.product-tagline { font-size: .8rem; color: var(--accent2); font-weight: 600; margin-bottom: 12px; text-transform: uppercase; letter-spacing: 1px; }
.product-card p { font-size: .9rem; color: var(--text-muted); flex: 1; margin-bottom: 16px; }
.product-meta { display: flex; flex-direction: column; gap: 4px; font-size: .75rem; color: var(--text-dim); }
.meta-savings { color: var(--accent2); font-weight: 600; }
.meta-claims { color: var(--text-dim); }

/* --- CALCULATOR ------------------------------------------------ */
.savings { padding: 120px 0; text-align: center; }
.savings h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); margin-bottom: 48px; }
.calc-container {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 48px; max-width: 800px; margin: 0 auto;
}
.calc-input-group { margin-bottom: 32px; }
.calc-input-group label { display: block; font-size: .9rem; color: var(--text-muted); margin-bottom: 12px; }
.calc-display {
  font-size: 1.4rem; font-weight: 700; color: var(--text); margin-top: 8px;
  font-family: var(--mono);
}
input[type="range"] {
  width: 100%; height: 6px; -webkit-appearance: none; appearance: none;
  background: #1e1e2e; border-radius: 3px; outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--gradient); cursor: pointer; border: 2px solid var(--bg);
  box-shadow: 0 0 20px #6366f140;
}
.calc-results { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-top: 32px; }
.calc-result {
  background: #0a0a12; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; text-align: center;
}
.calc-result.highlight { border-color: #06d6a040; }
.calc-result.featured { border-color: #6366f160; background: linear-gradient(135deg, #12121a, #1a1530); grid-column: span 2; }
.calc-label { display: block; font-size: .75rem; color: var(--text-muted); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 1px; }
.calc-value { font-size: 1.5rem; font-weight: 800; font-family: var(--mono); }
.calc-result.highlight .calc-value { color: var(--accent2); }
.calc-result.featured .calc-value { color: var(--accent); font-size: 2rem; }

/* --- COMPLIANCE ------------------------------------------------ */
.compliance { padding: 120px 0; text-align: center; }
.compliance h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); margin-bottom: 48px; }
.compliance-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; margin-bottom: 64px; }
.compliance-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; text-align: left;
}
.compliance-card h3 { font-size: 1.1rem; margin-bottom: 12px; }
.compliance-card p { font-size: .9rem; color: var(--text-muted); margin-bottom: 16px; }
.compliance-status { font-size: .8rem; font-weight: 600; color: var(--accent2); }
.compliance-matrix { max-width: 800px; margin: 0 auto; }
.compliance-matrix h3 { font-size: 1.2rem; margin-bottom: 24px; }
.compliance-matrix table { width: 100%; border-collapse: collapse; text-align: left; }
.compliance-matrix th {
  padding: 14px 16px; font-size: .75rem; text-transform: uppercase; letter-spacing: 1px;
  color: var(--text-muted); border-bottom: 1px solid var(--border);
}
.compliance-matrix td { padding: 14px 16px; border-bottom: 1px solid var(--border); font-size: .9rem; }
.compliance-matrix .pass { color: var(--accent2); font-weight: 600; }
.compliance-matrix .fail { color: var(--danger); }
.compliance-matrix .warn { color: var(--accent3); }

/* --- PRICING --------------------------------------------------- */
.pricing { padding: 120px 0; text-align: center; }
.pricing h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); margin-bottom: 48px; }
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.pricing-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 36px 28px; text-align: left; position: relative;
  display: flex; flex-direction: column;
  transition: all .3s;
}
.pricing-card:hover { border-color: var(--border-hover); transform: translateY(-3px); }
.pricing-card.popular { border-color: #6366f160; background: linear-gradient(135deg, #12121a, #1a1530); }
.pricing-card.sovereign { border-color: #f59e0b40; }
.popular-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--gradient); color: #fff; font-size: .7rem; font-weight: 700;
  padding: 4px 16px; border-radius: 100px; text-transform: uppercase; letter-spacing: 1px;
  white-space: nowrap;
}
.pricing-card h3 { font-size: 1.2rem; margin-bottom: 12px; }
.price { font-size: 2rem; font-weight: 800; font-family: var(--mono); margin-bottom: 4px; }
.price span { font-size: .8rem; font-weight: 400; color: var(--text-muted); }
.price-volume { font-size: .8rem; color: var(--text-dim); margin-bottom: 24px; }
.pricing-card ul { list-style: none; flex: 1; margin-bottom: 24px; }
.pricing-card li {
  padding: 8px 0; font-size: .9rem; color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.pricing-card li::before { content: "\2713 "; color: var(--accent2); font-weight: 700; }

/* --- START ------------------------------------------------------ */
.start {
  padding: 120px 0; text-align: center;
  background: linear-gradient(180deg, transparent 0%, #0f0f1a 100%);
}
.start h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); margin-bottom: 16px; }
.start p { color: var(--text-muted); font-size: 1.1rem; margin-bottom: 32px; }
.start-code {
  display: inline-block; background: #0d0d17; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 32px; margin-bottom: 32px;
}
.start-code code { font-size: 1rem; color: var(--accent2); }
.start-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* --- FOOTER ---------------------------------------------------- */
.footer { padding: 80px 0 32px; border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer-logo { font-size: 1.1rem; font-weight: 700; color: var(--text); display: block; margin-bottom: 12px; }
.footer p { font-size: .85rem; color: var(--text-muted); }
.footer h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: 2px; color: var(--text-dim); margin-bottom: 16px; }
.footer a { display: block; font-size: .9rem; color: var(--text-muted); margin-bottom: 8px; }
.footer a:hover { color: var(--accent); }
.footer-bottom { text-align: center; padding-top: 32px; border-top: 1px solid var(--border); }
.footer-bottom p { font-size: .75rem; color: var(--text-dim); }

/* --- RESPONSIVE ------------------------------------------------ */
@media (max-width: 768px) {
  .nav-links a:not(.nav-cta) { display: none; }
  .hero-stats { gap: 16px; }
  .stat-divider { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .calc-result.featured { grid-column: span 1; }
  .compliance-matrix { overflow-x: auto; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .hero-code { font-size: .75rem; }
  .pricing-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}