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

/* 
  DESIGN SYSTEM: JSON SMITH
  Style: High-tech, Obsidian, Precision
  Grid: CSS Grid + Flexbox hybrid
  Naming: BEM (Block__Element__Modifier)
*/

:root {
  /* Palette */
  --c-bg-body: #0a0a0a;
  --c-bg-surface: #121212;
  --c-bg-surface-elevated: #1a1a1a;
  --c-text-main: #ffffff;
  --c-text-muted: #888888;
  --c-accent: #00f0ff;
  --c-accent-dim: rgba(0, 240, 255, 0.1);
  --c-border: #2a2a2a;
  
  /* Typography */
  --f-sans: 'Inter', sans-serif;
  --f-mono: 'JetBrains Mono', monospace;
  
  /* Spacing Scale */
  --s-xs: clamp(0.5rem, 0.8vw, 0.75rem);
  --s-sm: clamp(1rem, 1.5vw, 1.5rem);
  --s-md: clamp(2rem, 3vw, 3rem);
  --s-lg: clamp(4rem, 6vw, 6rem);
  --s-xl: clamp(6rem, 10vw, 10rem);
  
  /* Layout */
  --w-container: 1280px;
  --r-sm: 4px;
  --r-md: 8px;
}

/* RESET */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--c-bg-body);
  color: var(--c-text-main);
  font-family: var(--f-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s ease;
}

ul {
  list-style: none;
}

/* TYPOGRAPHY */
.h1, .h2, .h3 {
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.h1 { font-size: clamp(3rem, 5vw, 5.5rem); }
.h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
.h3 { font-size: clamp(1.25rem, 2vw, 1.75rem); }

.mono-label {
  font-family: var(--f-mono);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-accent);
  font-weight: 700;
}

/* CONTAINER STANDARD */
.container {
  width: 100%;
  max-width: var(--w-container);
  margin: 0 auto;
  padding-inline: clamp(1.5rem, 4vw, 4rem);
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  font-family: var(--f-mono);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: all 0.25s ease;
  border: 1px solid transparent;
}

.btn--primary {
  background-color: var(--c-accent);
  color: #000;
}

.btn--primary:hover {
  background-color: #fff;
  box-shadow: 0 0 20px var(--c-accent-dim);
}

.btn--outline {
  background-color: transparent;
  border-color: var(--c-border);
  color: var(--c-text-main);
}

.btn--outline:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

/* HEADER / NAV */
.site-header {
  background-color: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header__inner {
  display: flex;
  flex-direction: column;
  padding-block: 1rem;
  gap: 1rem;
}

.header__top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  font-family: var(--f-mono);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.05em;
  color: var(--c-text-main);
}

.header__logo span { color: var(--c-accent); }

.nav-list {
  display: flex;
  gap: 2rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--c-text-muted);
}

.nav-link:hover, .nav-link--active {
  color: var(--c-text-main);
}

.header__cta-row {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 0.75rem;
}

.header__status {
  font-family: var(--f-mono);
  font-size: 0.75rem;
  color: var(--c-text-muted);
  align-self: center;
  margin-right: auto;
}

.header__status::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--c-accent);
  border-radius: 50%;
  margin-right: 6px;
  box-shadow: 0 0 8px var(--c-accent);
}

/* HERO SECTION */
.hero {
  padding-block: var(--s-lg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: -10%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, var(--c-accent-dim) 0%, transparent 70%);
  opacity: 0.4;
  pointer-events: none;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-md);
  align-items: center;
}

.hero__content {
  max-width: 600px;
  z-index: 2;
}

.hero__eyebrow {
  display: block;
  margin-bottom: 1.5rem;
}

.hero__title {
  margin-bottom: 1.5rem;
  color: var(--c-text-main);
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--c-text-muted);
  margin-bottom: 2.5rem;
  max-width: 90%;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero__visual {
  position: relative;
  height: 100%;
  min-height: 400px;
  background: var(--c-bg-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* CARDS / FEATURES */
.section-features {
  padding-block: var(--s-lg);
}

.section-header {
  margin-bottom: var(--s-md);
  max-width: 700px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--c-bg-surface);
  border: 1px solid var(--c-border);
  padding: 2.5rem;
  border-radius: var(--r-md);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  border-color: var(--c-accent);
  transform: translateY(-5px);
}

.card__title {
  margin-bottom: 1rem;
  color: var(--c-text-main);
}

.card__text {
  color: var(--c-text-muted);
  font-size: 0.95rem;
}

/* STATS */
.section-stats {
  padding-block: var(--s-md);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  background: var(--c-bg-surface);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: center;
}

.stat-item__number {
  display: block;
  font-family: var(--f-mono);
  font-size: clamp(2.5rem, 4vw, 4rem);
  color: var(--c-accent);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-item__label {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-text-muted);
}

/* CTA BAND */
.section-cta {
  padding-block: var(--s-lg);
  background: linear-gradient(135deg, var(--c-bg-surface) 0%, #0d1f23 100%);
  text-align: center;
}

.cta__content {
  max-width: 600px;
  margin: 0 auto;
}

.cta__title {
  margin-bottom: 1.5rem;
}

/* FAQ */
.section-faq {
  padding-block: var(--s-lg);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--c-border);
  padding-block: 1.5rem;
}

.faq-question {
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--c-text-main);
}

.faq-answer {
  color: var(--c-text-muted);
  font-size: 0.95rem;
}

/* FOOTER */
.site-footer {
  padding-block: var(--s-lg);
  border-top: 1px solid var(--c-border);
  margin-top: var(--s-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 4rem;
}

.footer-brand p {
  color: var(--c-text-muted);
  margin-top: 1rem;
  max-width: 300px;
  font-size: 0.9rem;
}

.footer-col__title {
  color: var(--c-text-main);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
  font-weight: 700;
}

.footer-link {
  display: block;
  color: var(--c-text-muted);
  margin-bottom: 0.8rem;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-link:hover {
  color: var(--c-accent);
}

.footer-bottom {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--c-border);
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: #555;
  font-family: var(--f-mono);
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 600px) {
  .nav-list { display: none; } /* Simplified for demo */
  .header__cta-row { display: none; }
  .header__status { justify-content: center; width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 1rem; }
}html{-webkit-text-size-adjust:100%}*{box-sizing:border-box}body{margin:0}img,svg,video{max-width:100%;height:auto}