/* ===== SELF-HOSTED FONTS ===== */

@font-face {
  font-family: 'Newsreader';
  src: url('../fonts/newsreader-variable.woff2') format('woff2');
  font-weight: 300 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Newsreader';
  src: url('../fonts/newsreader-variable-italic.woff2') format('woff2');
  font-weight: 300 500;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: 'DM Mono';
  src: url('../fonts/dm-mono-300.woff2') format('woff2');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'DM Mono';
  src: url('../fonts/dm-mono-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'DM Mono';
  src: url('../fonts/dm-mono-500.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

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

:root {
  --cream: #f5f0e8;
  --warm-white: #faf8f4;
  --ochre: #c4863b;
  --ochre-dim: #a06e2e;
  --deep-green: #2d4a3e;
  --stone: #8b7e6a;
  --stone-light: #b5a78f;
  --charcoal: #2c2926;
  --charcoal-soft: #4a4540;
  --terracotta: #b85c3a;
  --sage: #7a9183;
  --sand: #e8dfd0;
  --rule-line: #d4c9b5;
  --teal: #4a8e8b;
  --teal-dim: #3a7570;
  --teal-glow: rgba(74, 142, 139, 0.08);
  --dark-stone: #5a5042;
  --dark-teal: #357370;
  --mid-stone: #6d6254;
}

html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: 'Newsreader', Georgia, serif;
  background: var(--cream);
  color: var(--charcoal);
  line-height: 1.65;
  overflow-x: hidden;
}

/* Grain overlay */
body::after {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
}

.mono {
  font-family: 'DM Mono', 'Courier New', monospace;
}

a { color: var(--ochre-dim); text-decoration: none; }
a:hover { color: var(--terracotta); }

/* ===== LAYOUT ===== */

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 5rem 0;
  position: relative;
}

/* Gradient section dividers */
.architecture,
.tools,
.principles,
.cta-section {
  border-top: none;
}

.architecture::before,
.tools::before,
.principles::before,
.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--rule-line) 0%, var(--ochre) 35%, var(--teal) 65%, var(--rule-line) 100%);
  opacity: 0.5;
}

/* ===== NAV ===== */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--cream);
  border-bottom: 1px solid var(--rule-line);
  transition: box-shadow 0.3s ease;
}

nav.scrolled {
  box-shadow: 0 2px 20px rgba(44, 41, 38, 0.06);
}

.nav-mark {
  font-family: 'DM Mono', monospace;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--charcoal);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-family: 'DM Mono', monospace;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--dark-stone);
  transition: color 0.2s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1.5px;
  background: linear-gradient(90deg, var(--ochre), var(--teal));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav-links a:hover { color: var(--charcoal); }
.nav-links a:hover::after { transform: scaleX(1); }

/* ===== HERO ===== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 6rem;
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 2;
}

.hero-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dark-stone);
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.2s forwards;
}

.hero h1 {
  font-family: 'Newsreader', Georgia, serif;
  font-size: clamp(2.4rem, 5.5vw, 3.8rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.8rem;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.35s forwards;
}

.hero h1 em {
  font-style: italic;
  color: var(--ochre-dim);
}

.hero-body {
  font-size: 1.15rem;
  color: var(--charcoal-soft);
  max-width: 560px;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.5s forwards;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.65s forwards;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  padding: 0.85rem 1.8rem;
  background: linear-gradient(135deg, var(--charcoal) 0%, var(--deep-green) 100%);
  color: var(--cream);
  border: none;
  cursor: pointer;
  transition: background 0.25s, transform 0.15s, box-shadow 0.3s;
}

.hero-cta:hover {
  background: linear-gradient(135deg, var(--deep-green) 0%, var(--teal-dim) 100%);
  color: var(--cream);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(74, 142, 139, 0.15);
}

.hero-cta i {
  font-size: 14px;
  transition: transform 0.2s;
}

.hero-cta:hover i {
  transform: translateX(3px);
}

.hero-cta-secondary {
  font-family: 'DM Mono', monospace;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--dark-stone);
  position: relative;
  padding-bottom: 2px;
}

.hero-cta-secondary::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--rule-line);
  transition: background 0.2s;
}

.hero-cta-secondary:hover {
  color: var(--charcoal);
}

.hero-cta-secondary:hover::after {
  background: linear-gradient(90deg, var(--ochre), var(--teal));
}

.hero-aside {
  position: absolute;
  right: 2rem;
  bottom: 3rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.68rem;
  color: var(--dark-stone);
  writing-mode: vertical-rl;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeIn 0.6s ease 1s forwards;
  z-index: 2;
}

#hero-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

/* ===== SECTION SHARED ===== */

.section-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dark-teal);
  margin-bottom: 0.8rem;
}

.section-intro {
  color: var(--charcoal-soft);
  max-width: 560px;
  margin-bottom: 3rem;
}

section h2 {
  font-weight: 400;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  max-width: 540px;
}

/* ===== ARCHITECTURE ===== */

.architecture {
  background: var(--warm-white);
}

.arch-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--rule-line);
}

.arch-card {
  padding: 1.8rem 1.4rem;
  border-right: 1px solid var(--rule-line);
  position: relative;
  transition: background 0.3s ease;
  cursor: default;
}

.arch-card:last-child { border-right: none; }

.arch-card:hover {
  background: var(--cream);
}

.arch-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--ochre), var(--teal));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.arch-card:hover::after {
  transform: scaleX(1);
}

.arch-num {
  font-family: 'DM Mono', monospace;
  font-size: 0.68rem;
  color: var(--stone-light);
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.arch-icon {
  display: block;
  font-size: 1.35rem;
  margin-bottom: 1rem;
  transition: transform 0.3s ease;
}

.arch-card:hover .arch-icon {
  transform: scale(1.15);
}

.arch-card:nth-child(1) .arch-icon { color: var(--ochre); }
.arch-card:nth-child(2) .arch-icon { color: var(--sage); }
.arch-card:nth-child(3) .arch-icon { color: var(--teal); }
.arch-card:nth-child(4) .arch-icon { color: var(--deep-green); }

.arch-name {
  font-family: 'DM Mono', monospace;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  margin-bottom: 0.7rem;
  color: var(--charcoal);
}

.arch-desc {
  font-size: 0.88rem;
  color: var(--charcoal-soft);
  line-height: 1.55;
}

/* ===== TOOLS ===== */

.tools h2 {
  margin-bottom: 3rem;
}

.tool-stack {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border: 1px solid var(--rule-line);
}

.tool-card {
  padding: 2rem 2rem;
  border-bottom: 1px solid var(--rule-line);
  position: relative;
  transition: background 0.3s ease;
}

.tool-card:last-child { border-bottom: none; }

.tool-card:hover {
  background: var(--warm-white);
}

.tool-primary {
  background: var(--warm-white);
}

.tool-primary:hover {
  background: var(--cream);
}

/* Gradient left accent on primary */
.tool-primary::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--ochre), var(--teal));
}

.tool-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.8rem;
}

.tool-icon {
  font-size: 1.3rem;
  color: var(--teal);
}

.tool-primary .tool-icon {
  color: var(--ochre);
}

.tool-status {
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  background: linear-gradient(135deg, var(--deep-green), var(--teal-dim));
  color: var(--cream);
}

.tool-name {
  font-family: 'DM Mono', monospace;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 0.6rem;
  color: var(--charcoal);
}

.tool-desc {
  font-size: 0.92rem;
  color: var(--charcoal-soft);
  line-height: 1.55;
  max-width: 640px;
  margin-bottom: 1rem;
}

.tool-standalone {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--dark-teal);
  letter-spacing: 0.02em;
  margin-bottom: 0.8rem;
}

.tool-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--dark-stone);
  letter-spacing: 0.04em;
}

.tool-link {
  color: var(--dark-teal);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.tool-link:hover {
  color: var(--teal);
}

.tool-link i {
  font-size: 0.7rem;
}

/* ===== PRINCIPLES ===== */

.principles {
  background: var(--warm-white);
}

.principles h2 {
  margin-bottom: 3rem;
}

.principle-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border: 1px solid var(--rule-line);
  max-width: 720px;
}

.principle-item {
  padding: 1.3rem 1.8rem;
  border-bottom: 1px solid var(--rule-line);
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 1rem;
  align-items: start;
  transition: background 0.2s;
}

.principle-item:last-child { border-bottom: none; }

.principle-item:hover {
  background: var(--cream);
}

.principle-num {
  font-family: 'DM Mono', monospace;
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--stone-light);
  line-height: 1;
  padding-top: 0.2rem;
}

.principle-name {
  font-family: 'DM Mono', monospace;
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 0.3rem;
  color: var(--charcoal);
}

.principle-desc {
  font-size: 0.88rem;
  color: var(--charcoal-soft);
  line-height: 1.5;
}

/* ===== BRIDGE ===== */

.bridge {
  padding: 3rem 0;
  text-align: center;
  border-top: 1px solid var(--rule-line);
  border-bottom: 1px solid var(--rule-line);
}

.bridge-text {
  font-family: 'Newsreader', Georgia, serif;
  font-style: italic;
  font-weight: 350;
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--stone);
  max-width: 520px;
  margin: 0 auto;
}

/* ===== CTA ===== */

.cta-section {
  text-align: center;
  padding: 5rem 0;
}

.cta-section h2 {
  max-width: none;
  margin-bottom: 1rem;
}

.cta-section p {
  color: var(--charcoal-soft);
  margin-bottom: 2rem;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  margin-bottom: 1.5rem;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  padding: 0.85rem 2rem;
  background: linear-gradient(135deg, var(--charcoal) 0%, var(--deep-green) 100%);
  color: var(--cream);
  border: none;
  cursor: pointer;
  transition: background 0.25s, transform 0.15s, box-shadow 0.3s;
}

.cta-button:hover {
  background: linear-gradient(135deg, var(--deep-green) 0%, var(--teal-dim) 100%);
  color: var(--cream);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(74, 142, 139, 0.15);
}

.cta-button i {
  font-size: 14px;
  transition: transform 0.2s;
}

.cta-button:hover i {
  transform: translateX(3px);
}

.cta-sub {
  font-family: 'DM Mono', monospace;
  font-size: 0.76rem;
  color: var(--mid-stone);
  letter-spacing: 0.04em;
}

/* ===== FOOTER ===== */

footer {
  border-top: 1px solid var(--rule-line);
  padding: 2.5rem 0;
  font-family: 'DM Mono', monospace;
  font-size: 0.76rem;
  color: var(--dark-stone);
  letter-spacing: 0.04em;
}

footer a {
  color: var(--dark-stone);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--rule-line);
}

footer a:hover {
  color: var(--charcoal);
  text-decoration-color: var(--ochre);
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-right {
  display: flex;
  gap: 1.5rem;
}

/* ===== ANIMATIONS ===== */

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== ACCESSIBILITY ===== */

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--ochre);
  outline-offset: 2px;
  border-radius: 2px;
}

.nav-links a:focus-visible {
  outline-offset: 4px;
}

.hero-cta:focus-visible,
.cta-button:focus-visible {
  outline: 3px solid var(--ochre);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 999;
  padding: 0.8rem 1.2rem;
  background: var(--charcoal);
  color: var(--cream);
  text-decoration: none;
  font-family: 'DM Mono', monospace;
  font-size: 0.82rem;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* ===== RESPONSIVE ===== */

@media (max-width: 900px) {
  .arch-grid {
    grid-template-columns: 1fr 1fr;
  }

  .arch-card {
    border-bottom: 1px solid var(--rule-line);
  }

  .arch-card:nth-child(2) { border-right: none; }
  .arch-card:nth-child(3) { border-right: 1px solid var(--rule-line); }
  .arch-card:nth-child(3),
  .arch-card:nth-child(4) { border-bottom: none; }
  .arch-card:nth-child(4) { border-right: none; }
}

@media (max-width: 600px) {
  html { font-size: 15px; }
  section { padding: 3.5rem 0; }

  .hero-aside { display: none; }
  #hero-canvas { display: none; }
  .nav-links { gap: 1rem; }

  .arch-grid {
    grid-template-columns: 1fr;
  }

  .arch-card {
    border-right: none;
    border-bottom: 1px solid var(--rule-line);
  }

  .arch-card:last-child { border-bottom: none; }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .principle-item {
    grid-template-columns: 2rem 1fr;
    gap: 0.8rem;
    padding: 1.1rem 1.2rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.8rem;
    text-align: center;
  }

  .footer-right {
    flex-wrap: wrap;
    justify-content: center;
  }
}