/* =========================================================
   Tokens
   ========================================================= */
:root {
  --color-background: #0B0B10;
  --color-foreground: #F8FAFC;
  --color-card: #1E1E23;
  --color-card-hover: #232329;
  --color-muted: #232328;
  --color-muted-foreground: #94A3B8;
  --color-border: #262636;
  --color-accent: #3B82F6;
  --color-accent-hover: #2563EB;
  --color-accent-light: #60A5FA;
  --color-on-accent: #04070F;
  --color-success: #34D399;
  --color-danger: #EF4444;

  --font-heading: "Exo", "Segoe UI", system-ui, sans-serif;
  --font-body: "Exo", "Segoe UI", system-ui, sans-serif;
  --font-mono: "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --header-height: 72px;
  --container-width: 1180px;

  --transition-fast: 180ms ease;
  --transition-base: 280ms ease;
}

/* =========================================================
   Reset & base
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-foreground);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
  margin: 0 0 var(--space-3);
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.5rem, 5vw + 1rem, 4.25rem); font-weight: 800; }
h2 { font-size: clamp(1.75rem, 2.5vw + 1rem, 2.5rem); }
h3 { font-size: 1.15rem; }

p { margin: 0 0 var(--space-3); }

a {
  color: var(--color-accent-light);
  text-decoration-color: transparent;
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition-fast), color var(--transition-fast);
}
a:hover { text-decoration-color: currentColor; }

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

ul { list-style: none; margin: 0; padding: 0; }

button { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--color-accent-light);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -60px;
  background: var(--color-accent);
  color: var(--color-on-accent);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 200;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: var(--space-3); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0 var(--space-4);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--color-accent);
  color: var(--color-on-accent);
}
.btn-primary:hover { background: var(--color-accent-hover); }

.btn-ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-foreground);
}
.btn-ghost:hover { border-color: var(--color-accent-light); }

.btn-sm { min-height: 40px; padding: 0 var(--space-3); font-size: 0.875rem; }
.btn-lg { min-height: 52px; padding: 0 var(--space-5); font-size: 1rem; }

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(11, 11, 16, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.logo {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-foreground);
  text-decoration: none;
}
.logo:hover { text-decoration: none; }
.logo-glyph { color: var(--color-accent); }
.logo-accent { color: var(--color-accent-light); }
.logo-sm { font-size: 0.95rem; }

.main-nav ul {
  display: flex;
  gap: var(--space-5);
}
.main-nav a {
  color: var(--color-muted-foreground);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
}
.main-nav a:hover { color: var(--color-foreground); }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav-toggle-bar {
  width: 20px;
  height: 2px;
  margin-inline: auto;
  background: var(--color-foreground);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-8) var(--space-7);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: -1px;
  background-image:
    linear-gradient(to right, rgba(59, 130, 246, 0.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(59, 130, 246, 0.09) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 90%);
  animation: grid-drift 40s linear infinite;
}

@keyframes grid-drift {
  from { background-position: 0 0; }
  to { background-position: 56px 112px; }
}

.hero-glow {
  position: absolute;
  width: 46vw;
  height: 46vw;
  max-width: 620px;
  max-height: 620px;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.28;
}
.hero-glow-a {
  top: -12%;
  right: -10%;
  background: var(--color-accent);
  animation: glow-pulse 9s ease-in-out infinite;
}
.hero-glow-b {
  bottom: -20%;
  left: -12%;
  background: #7C3AED;
  opacity: 0.16;
  animation: glow-pulse 11s ease-in-out infinite reverse;
}

@keyframes glow-pulse {
  0%, 100% { transform: scale(1); opacity: 0.28; }
  50% { transform: scale(1.12); opacity: 0.4; }
}

.hero-scanline {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 0%, rgba(59, 130, 246, 0.05) 50%, transparent 100%);
  background-size: 100% 240px;
  animation: scan-move 6s linear infinite;
}

@keyframes scan-move {
  from { background-position: 0 -240px; }
  to { background-position: 0 100vh; }
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-7);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted-foreground);
  margin-bottom: var(--space-4);
}
.eyebrow-static { margin-bottom: var(--space-2); color: var(--color-accent-light); }

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.5);
  animation: status-pulse 2.4s ease-in-out infinite;
}

@keyframes status-pulse {
  0% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.5); }
  70% { box-shadow: 0 0 0 8px rgba(52, 211, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

.text-accent { color: var(--color-accent-light); }

.hero-lead {
  color: var(--color-muted-foreground);
  font-size: 1.1rem;
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-block: var(--space-5);
}

.hero-stats {
  display: flex;
  gap: var(--space-6);
  margin: 0;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}
.hero-stat dt {
  font-size: 0.8rem;
  color: var(--color-muted-foreground);
  margin-bottom: var(--space-1);
}
.hero-stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-foreground);
}

/* Terminal */
.hero-visual { position: relative; }

.terminal {
  background: rgba(20, 20, 26, 0.9);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 64px -24px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(59, 130, 246, 0.06);
  overflow: hidden;
}

.terminal-titlebar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--color-border);
}
.terminal-dot { width: 11px; height: 11px; border-radius: 50%; }
.terminal-dot-red { background: #EF4444; }
.terminal-dot-yellow { background: #F59E0B; }
.terminal-dot-green { background: #22C55E; }
.terminal-title {
  margin-inline: auto;
  transform: translateX(-16px);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-muted-foreground);
}

.terminal-body {
  margin: 0;
  padding: var(--space-4);
  min-height: 320px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: #CBD5E1;
  white-space: pre-wrap;
  word-break: break-word;
}

/* =========================================================
   Sections
   ========================================================= */
.section { padding-block: var(--space-8); }
.section:nth-of-type(even) { background: rgba(255, 255, 255, 0.015); }

.section-head { max-width: 640px; margin-inline: auto; text-align: center; margin-bottom: var(--space-6); }
.section-head-left { margin-inline: 0; text-align: left; }
.section-lead { color: var(--color-muted-foreground); }

/* Cards / services */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.card {
  position: relative;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: border-color var(--transition-base), transform var(--transition-base), background var(--transition-base);
}
.card:hover {
  border-color: rgba(59, 130, 246, 0.4);
  background: var(--color-card-hover);
  transform: translateY(-4px);
}
.card-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent-light);
  display: block;
  margin-bottom: var(--space-3);
}
.card h3 { margin-bottom: var(--space-2); }
.card p { color: var(--color-muted-foreground); margin: 0; font-size: 0.95rem; }

/* Stack badges */
.stack-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}
.stack-badge {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-card);
  color: var(--color-foreground);
  transition: border-color var(--transition-base), color var(--transition-base);
}
.stack-badge:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-light);
}

/* About */
.about-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-7);
  align-items: start;
}
.about-body p { color: var(--color-muted-foreground); font-size: 1.05rem; }
.principles {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
}
.principles li {
  padding-left: var(--space-4);
  border-left: 2px solid var(--color-accent);
  color: var(--color-muted-foreground);
}
.principles strong { color: var(--color-foreground); }

/* Contact */
.contact-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-7);
  align-items: center;
}
.contact-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
}
.contact-meta {
  font-family: var(--font-mono);
  color: var(--color-muted-foreground);
  margin-top: var(--space-3);
  margin-bottom: 0;
}
.contact-meta-muted { font-size: 0.85rem; margin-top: var(--space-1); }

/* =========================================================
   Reveal-on-scroll
   ========================================================= */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms ease, transform 500ms ease;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-5);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.footer-legal { display: flex; gap: var(--space-4); }
.footer-legal a { color: var(--color-muted-foreground); font-size: 0.875rem; text-decoration: none; }
.footer-legal a:hover { color: var(--color-foreground); }
.footer-copy { color: var(--color-muted-foreground); font-size: 0.85rem; margin: 0; }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .about-inner, .contact-inner { grid-template-columns: 1fr; }
  .contact-card { justify-self: start; }
}

@media (max-width: 768px) {
  :root { --header-height: 64px; }
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .header-actions .btn-sm { display: none; }

  .main-nav.is-open {
    display: block;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4);
  }
  .main-nav.is-open ul { flex-direction: column; gap: var(--space-4); }

  .hero { padding-block: var(--space-6) var(--space-5); }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-stats { gap: var(--space-4); flex-wrap: wrap; }

  .card-grid { grid-template-columns: 1fr; }
  .section { padding-block: var(--space-6); }
}

@media (max-width: 375px) {
  .container { padding-inline: var(--space-3); }
  .terminal-body { font-size: 0.78rem; }
}

/* =========================================================
   Reduced motion
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-grid, .hero-glow, .hero-scanline, .status-dot {
    animation: none !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn:hover { transform: none; }
  .card:hover { transform: none; }
}