@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

/* ─── Design Tokens ─────────────────────────────────── */
:root {
  --bg-base:       #080c14;
  --bg-surface:    #0f1623;
  --bg-elevated:   #162033;
  --bg-card:       #1b2640;

  --accent-teal:   #00d4a8;
  --accent-blue:   #3b6ff5;
  --accent-teal-glow: rgba(0, 212, 168, 0.18);
  --accent-blue-glow: rgba(59, 111, 245, 0.18);
  --accent-teal-dim:  rgba(0, 212, 168, 0.08);

  --text-primary:  #e8edf5;
  --text-secondary: #7a8fb5;
  --text-muted:    #4a5872;

  --border:        #1e2d45;
  --border-light:  #263650;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  --font-serif: 'DM Serif Display', Georgia, serif;
  --font-sans:  'Space Grotesk', system-ui, sans-serif;
}

/* ─── Reset ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }

/* ─── Typography ─────────────────────────────────────── */
h1 { font-family: var(--font-serif); font-size: clamp(3rem, 8vw, 6rem); line-height: 1.05; font-weight: 400; }
h2 { font-family: var(--font-serif); font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.1; font-weight: 400; }
h3 { font-family: var(--font-serif); font-size: clamp(1.4rem, 3vw, 2rem); line-height: 1.2; font-weight: 400; }
h4 { font-family: var(--font-sans); font-size: clamp(1rem, 2vw, 1.2rem); font-weight: 600; letter-spacing: 0.02em; }
p  { font-size: clamp(0.95rem, 1.5vw, 1.05rem); color: var(--text-secondary); line-height: 1.75; }
.label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-teal);
}

/* ─── Layout Utilities ───────────────────────────────── */
.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 3rem);
}
.section-pad { padding-block: clamp(5rem, 10vw, 9rem); }

/* ─── Navigation ─────────────────────────────────────── */
#main-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1.25rem 0;
  transition: background var(--transition), border-color var(--transition), padding var(--transition);
  border-bottom: 1px solid transparent;
}
#main-nav.scrolled {
  background: rgba(8, 12, 20, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
  padding: 0.85rem 0;
}
.nav-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
}
.nav-logo {
  font-family: var(--font-sans);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
}
.nav-logo .bracket { color: var(--accent-teal); transition: text-shadow var(--transition); }
.nav-logo .logo-name { color: var(--text-primary); letter-spacing: -0.22em; }
.nav-logo .logo-nav-letter { display: inline-block; }
.nav-logo .slash { color: var(--accent-blue); }
.nav-logo:hover .bracket { text-shadow: 0 0 16px var(--accent-teal); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0; right: 100%;
  height: 1px;
  background: var(--accent-teal);
  transition: right var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { right: 0; }
.nav-links a.active { color: var(--text-primary); }
.nav-links a.active::after { right: 0; }

.nav-cta {
  background: var(--accent-teal);
  color: var(--bg-base) !important;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  transition: background var(--transition), box-shadow var(--transition) !important;
}
.nav-cta::after { display: none !important; }
.nav-cta:hover { background: #00ffe4 !important; box-shadow: 0 0 20px rgba(0, 212, 168, 0.4) !important; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  z-index: 1100;
  background: none;
  border: none;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav overlay */
.nav-mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(8, 12, 20, 0.97);
  backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow);
}
.nav-mobile-overlay.open {
  display: flex;
  opacity: 1;
  pointer-events: all;
}
.nav-mobile-overlay a {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.nav-mobile-overlay a:hover, .nav-mobile-overlay a.active { color: var(--text-primary); }
.nav-mobile-overlay .nav-cta {
  font-family: var(--font-sans);
  font-size: 1rem;
  padding: 0.75rem 2rem;
  margin-top: 1rem;
}

/* ─── Buttons ────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--accent-teal);
  color: var(--bg-base);
  border-color: var(--accent-teal);
}
.btn-primary:hover {
  background: transparent;
  color: var(--accent-teal);
  box-shadow: 0 0 24px var(--accent-teal-glow);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-light);
}
.btn-outline:hover {
  border-color: var(--accent-teal);
  color: var(--accent-teal);
}

/* ─── Section Headers ────────────────────────────────── */
.section-header {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}
.section-header .label { margin-bottom: 0.75rem; display: block; }
.section-header h2 { color: var(--text-primary); }
.section-header p { max-width: 52ch; margin-top: 1rem; }

/* ─── Cards ──────────────────────────────────────────── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.card:hover {
  border-color: var(--border-light);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
}

/* ─── Footer ─────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
  padding-block: 3rem 2rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
}
.footer-brand p { margin-top: 0.75rem; font-size: 0.9rem; max-width: 28ch; }
.footer-col h5 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
}
.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent-teal); }
.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ─── Reveal Animation ───────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ─── Page Hero ──────────────────────────────────────── */
.page-hero {
  padding-top: clamp(7rem, 14vw, 12rem);
  padding-bottom: clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--border);
}
.page-hero .label { margin-bottom: 1rem; display: block; }
.page-hero h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
.page-hero p { max-width: 52ch; margin-top: 1.25rem; font-size: 1.05rem; }

/* ─── Responsive ─────────────────────────────────────── */
@media (max-width: 900px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}