/* ============================================
   Topfield Capital — Design System
   Warm editorial. Wireframe terrain. Serif type.
   ============================================ */

:root {
  --bg: #ece9e3;
  --bg-alt: #e3dfd8;
  --bg-card: #f5f3ef;
  --border: #d4d0c8;
  --text: #1e2d20;
  --text-secondary: #4a5a4c;
  --text-muted: #7a887c;
  --accent: #2d4a32;
  --accent-light: #3d6344;
  --white: #ffffff;
  --max-width: 1080px;
  --font-serif: 'Georgia', 'Times New Roman', 'Palatino Linotype', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  --radius: 4px;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ============================================
   Layout
   ============================================ */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* ============================================
   Nav
   ============================================ */

nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(236, 233, 227, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
}
.nav-brand:hover { text-decoration: none; }

.nav-brand img {
  height: 36px;
  width: auto;
}

.nav-brand span {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-links a.active { color: var(--text); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 4px;
}

/* ============================================
   Hero (Home)
   ============================================ */

.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: flex-end;
  padding: 0 0 80px;
  overflow: hidden;
}

.hero-terrain {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-terrain canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: 3.2rem;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 24px;
}

.hero .tagline {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  border-radius: var(--radius);
}
.btn-primary:hover {
  background: var(--accent-light);
  text-decoration: none;
  color: var(--white);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--text);
  border-radius: var(--radius);
}
.btn-outline:hover {
  background: var(--text);
  color: var(--bg);
  text-decoration: none;
}

.btn-text {
  background: none;
  padding: 0;
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
}
.btn-text:hover { text-decoration: underline; }

/* ============================================
   Sections
   ============================================ */

section {
  padding: 80px 0;
}

.section-rule {
  border-top: 1px solid var(--border);
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 48px;
}

/* ============================================
   Pillars (Home)
   ============================================ */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.pillar {
  background: var(--bg);
  padding: 40px 32px;
  text-decoration: none;
  color: inherit;
  transition: background 0.2s;
}

.pillar:hover {
  background: var(--bg-card);
  text-decoration: none;
}

.pillar-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  display: block;
}

.pillar h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 400;
  margin-bottom: 12px;
}

.pillar p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.pillar-link {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.02em;
}

/* ============================================
   Currently (Home)
   ============================================ */

.currently-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--border);
}

.currently-item {
  display: flex;
  align-items: baseline;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.currently-item .label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  width: 100px;
  flex-shrink: 0;
}

.currently-item .value {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ============================================
   Page Header
   ============================================ */

.page-header {
  padding: 80px 0 48px;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.page-header .lead {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 580px;
  line-height: 1.7;
}

/* ============================================
   Process Steps
   ============================================ */

.process {
  counter-reset: step;
}

.process-step {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 24px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  counter-increment: step;
}

.process-step::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-top: 2px;
}

.process-step h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 400;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   Stats Row
   ============================================ */

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-top: 48px;
}

.stat {
  background: var(--bg);
  padding: 32px;
}

.stat-value {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ============================================
   Sectors / Tags
   ============================================ */

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-size: 0.8rem;
  padding: 6px 16px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-weight: 500;
}

/* ============================================
   Tiers (AI page)
   ============================================ */

.tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.tier {
  background: var(--bg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
}

.tier.featured { background: var(--bg-card); }

.tier-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.tier h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  margin-bottom: 8px;
}

.tier .price {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.tier ul {
  list-style: none;
  flex: 1;
  margin-bottom: 28px;
}

.tier ul li {
  padding: 5px 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.tier ul li::before {
  content: "\2014\00a0";
  color: var(--text-muted);
}

/* ============================================
   Capabilities Grid (AI page)
   ============================================ */

.cap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.cap {
  background: var(--bg);
  padding: 32px;
}

.cap h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 400;
  margin-bottom: 8px;
}

.cap p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   Product List
   ============================================ */

.product-list {
  border-top: 1px solid var(--border);
}

.product-item {
  display: grid;
  grid-template-columns: 1fr 200px 100px;
  gap: 24px;
  align-items: baseline;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}

.product-item h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 400;
  margin-bottom: 4px;
}

.product-item .desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.product-item .domain {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: right;
}

.badge {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: right;
}

.badge-live { color: var(--accent); }
.badge-dev { color: var(--text-muted); }
.badge-planned { color: #8a7530; }

/* ============================================
   About Page
   ============================================ */

.about-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 64px;
  align-items: start;
}

.about-content h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  margin: 48px 0 16px;
}

.about-content h2:first-child { margin-top: 0; }

.about-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 16px;
}

.about-sidebar {
  position: sticky;
  top: 84px;
}

.headshot {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  filter: grayscale(15%);
  margin-bottom: 32px;
}

.detail-list {
  border-top: 1px solid var(--border);
}

.detail-row {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

.detail-row .label { color: var(--text-muted); }
.detail-row .value { color: var(--text); font-weight: 500; }

.contact-list {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-list a {
  display: block;
  padding: 14px 16px;
  border: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text);
  transition: all 0.2s;
}

.contact-list a:hover {
  background: var(--bg-card);
  border-color: var(--accent);
  text-decoration: none;
}

/* ============================================
   Footer
   ============================================ */

footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  margin-top: 32px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-left {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer-links a:hover { color: var(--text); text-decoration: none; }

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
  html { font-size: 16px; }

  .container { padding: 0 20px; }

  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 20px 24px;
    gap: 16px;
  }
  .nav-toggle { display: block; }

  .hero { min-height: 70vh; padding-bottom: 48px; }
  .hero h1 { font-size: 2.2rem; }

  .pillars { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .tiers { grid-template-columns: 1fr; }
  .cap-grid { grid-template-columns: 1fr; }

  .section-title { font-size: 1.7rem; }
  .page-header h1 { font-size: 2rem; }
  .page-header { padding: 48px 0 32px; }

  .process-step { grid-template-columns: 40px 1fr; gap: 16px; }

  .product-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .product-item .domain,
  .product-item .badge { text-align: left; }

  .about-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .about-sidebar { position: static; }
  .headshot { max-width: 280px; }

  .footer-inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}