/* =========================================================
   PRODLAYER — REVIEW-READY ONE-FILE PROTOTYPE · v1
   7 pages · master visual system · legal-safety applied
   ========================================================= */

/* 01 / TOKENS */
:root {
  --ink: #0A0A0A;
  --paper: #FAFAF7;
  --mute: #6B6B68;
  --rule: #E5E2DC;
  --accent: #8B7355;
  --accent-soft: #E8DFD3;
  --accent-deep: #6E5A40;
  --surface-dark: #0A0A0A;
  --space-section: 160px;
  --space-block: 80px;
  --space-card: 40px;
  --max-width: 1280px;
  --outer-padding: 80px;
  --transition: 200ms ease-out;
  --reveal: 700ms ease-out;
}

/* 02 / RESET */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter Tight', 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  font-size: 18px;
  line-height: 30px;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul, ol { list-style: none; }

/* 03 / TYPOGRAPHY */
.display-xl { font-size: 88px; line-height: 92px; letter-spacing: -0.04em; font-weight: 500; }
.display-lg { font-size: 64px; line-height: 70px; letter-spacing: -0.03em; font-weight: 500; }
.display-md { font-size: 36px; line-height: 42px; letter-spacing: -0.02em; font-weight: 500; }
.display-sm { font-size: 26px; line-height: 32px; letter-spacing: -0.02em; font-weight: 500; }
.body-lg { font-size: 22px; line-height: 34px; letter-spacing: -0.01em; font-weight: 400; }
.body-md { font-size: 18px; line-height: 30px; font-weight: 400; }
.body-sm { font-size: 15px; line-height: 24px; font-weight: 400; }
.label {
  font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace;
  font-size: 11px; line-height: 16px; letter-spacing: 0.12em;
  text-transform: uppercase; font-weight: 500; color: var(--mute);
}
.label.large { font-size: 13px; }
.muted { color: var(--mute); }

/* 04 / LAYOUT */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--outer-padding); }
.section { padding: var(--space-section) 0; }
.section-marker { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
.section-marker::before { content: ''; display: block; width: 64px; height: 1px; background: var(--ink); }
.section-headline { max-width: 1100px; margin-bottom: 64px; }
.center-link { display: flex; justify-content: center; margin-top: 64px; }

/* 05 / NAV */
.nav {
  position: fixed; top: 0; left: 0; right: 0; height: 72px;
  background: var(--paper); border-bottom: 1px solid var(--rule); z-index: 100;
  transition: background var(--transition), height var(--transition);
}
.nav.condensed {
  height: 60px; background: rgba(250, 250, 247, 0.88);
  backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px);
}
.nav-inner {
  height: 100%; max-width: var(--max-width); margin: 0 auto;
  padding: 0 var(--outer-padding);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.nav-logo { font-size: 18px; font-weight: 500; letter-spacing: -0.02em; white-space: nowrap; cursor: pointer; }
.nav-items { display: flex; gap: 14px; align-items: center; }
.nav-item {
  font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace;
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em;
  font-weight: 500; padding: 6px 0; cursor: pointer;
  transition: color var(--transition); white-space: nowrap;
}
.nav-item .nav-num { color: var(--mute); margin-right: 6px; transition: color var(--transition); }
.nav-item:hover .nav-num { color: var(--accent); }
.nav-item:hover { text-decoration: underline; text-underline-offset: 6px; text-decoration-thickness: 1px; }
.nav-item.active .nav-num { color: var(--accent); }
.nav-cta {
  display: inline-flex; align-items: center; height: 40px; padding: 0 16px;
  background: var(--accent); color: var(--paper); border-radius: 999px;
  font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace;
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em;
  font-weight: 500; cursor: pointer; transition: opacity var(--transition);
  white-space: nowrap; flex-shrink: 0;
}
.nav-cta:hover { opacity: 0.88; }
.nav-cta .nav-num { color: rgba(250, 250, 247, 0.6); margin-right: 6px; }
.nav-burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.nav-burger span { width: 22px; height: 1px; background: var(--ink); transition: var(--transition); }
.mobile-menu {
  position: fixed; inset: 0; background: var(--paper); z-index: 99;
  padding: 100px var(--outer-padding) 40px;
  transform: translateY(-100%); transition: transform 300ms ease-out;
  display: flex; flex-direction: column; justify-content: space-between;
}
.mobile-menu.open { transform: translateY(0); }
.mobile-menu-items { display: flex; flex-direction: column; gap: 20px; }
.mobile-menu-item { font-size: 28px; font-weight: 500; letter-spacing: -0.02em; cursor: pointer; }
.mobile-menu-item .nav-num {
  font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace;
  font-size: 13px; color: var(--mute); margin-right: 12px; letter-spacing: 0.12em;
}

/* 06 / BUTTONS */
.btn-primary {
  display: inline-flex; align-items: center; height: 56px; padding: 0 24px;
  background: var(--accent); color: var(--paper); border-radius: 999px;
  font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace;
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.12em;
  font-weight: 500; cursor: pointer; transition: opacity var(--transition);
}
.btn-primary:hover { opacity: 0.88; }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace;
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.12em;
  font-weight: 500; cursor: pointer; padding: 8px 0;
  transition: color var(--transition);
}
.btn-secondary::after { content: '→'; transition: transform var(--transition); }
.btn-secondary:hover::after { transform: translateX(4px); }
.btn-secondary:hover { text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 1px; }
.btn-cluster { display: flex; gap: 32px; align-items: center; flex-wrap: wrap; }

/* 07 / HERO */
.hero { padding-top: 180px; padding-bottom: var(--space-section); }
.hero-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; align-items: end; }
.hero-content { grid-column: 1 / 11; }
.hero-label { margin-bottom: 40px; }
.hero-headline { margin-bottom: 32px; max-width: 1100px; }
.hero-subline { margin-bottom: 48px; max-width: 720px; color: var(--mute); }
.hero-diagram { grid-column: 11 / 13; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.hero-diagram-cell {
  aspect-ratio: 1; border: 1px solid var(--rule);
  display: flex; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace;
  font-size: 11px; color: var(--mute); letter-spacing: 0.1em;
  transition: var(--transition);
}
.hero-diagram-cell:hover { border-color: var(--ink); color: var(--ink); }
.hero-label, .hero-headline, .hero-subline, .hero-cta-row {
  opacity: 0; transform: translateY(20px);
  animation: heroIn 700ms ease-out forwards;
}
.hero-headline { animation-delay: 150ms; }
.hero-subline { animation-delay: 350ms; }
.hero-cta-row { animation-delay: 550ms; }
@keyframes heroIn { to { opacity: 1; transform: translateY(0); } }

/* 08 / REVEAL */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity var(--reveal), transform var(--reveal); }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* 09 / TOOL CARDS */
.tool-stack { display: flex; flex-direction: column; gap: 24px; }
.tool-card {
  border: 1px solid var(--rule); padding: var(--space-card);
  background: var(--paper);
  display: grid; grid-template-columns: 1.4fr 2fr 1fr; gap: 32px; align-items: start;
  transition: border-color var(--transition);
}
.tool-card:hover { border-color: var(--ink); }
.tool-card-num { font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 13px; color: var(--mute); letter-spacing: 0.12em; font-weight: 500; }
.tool-card-name { font-size: 26px; line-height: 32px; letter-spacing: -0.02em; font-weight: 500; margin-top: 12px; }
.tool-card-tag { display: inline-block; font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 10px; color: var(--accent-deep); background: var(--accent-soft); padding: 4px 10px; letter-spacing: 0.1em; text-transform: uppercase; font-weight: 500; margin-top: 16px; }
.tool-card-desc { color: var(--mute); }
.tool-card-meta { display: flex; flex-direction: column; gap: 12px; }
.tool-card-meta-item { font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 11px; color: var(--mute); letter-spacing: 0.1em; }
.tool-card-meta-item strong { display: block; color: var(--ink); font-weight: 500; margin-top: 4px; font-size: 13px; letter-spacing: 0; text-transform: none; line-height: 18px; }

/* 10 / FOUNDER BLOCK */
.founder-grid { display: grid; grid-template-columns: 4fr 1fr 7fr; gap: 0; align-items: start; }
.founder-photo { aspect-ratio: 1; border: 1px solid var(--rule); display: flex; align-items: center; justify-content: center; background: var(--paper); }
.founder-photo-initials { font-size: 80px; font-weight: 500; letter-spacing: -0.04em; color: var(--mute); }
.founder-content { grid-column: 3 / 4; }
.founder-name { margin-bottom: 16px; }
.founder-role { margin-bottom: 32px; }
.founder-bio { margin-bottom: 32px; color: var(--mute); max-width: 600px; }

/* 11 / WEDGE FLOW */
.wedge-flow { display: grid; grid-template-columns: repeat(11, 1fr); gap: 8px; align-items: center; margin: 32px 0; }
.wedge-node {
  grid-column: span 2; border: 1px solid var(--rule); padding: 16px 12px;
  text-align: center; aspect-ratio: 1.6; display: flex; align-items: center; justify-content: center; flex-direction: column;
  transition: border-color var(--transition);
}
.wedge-node:hover { border-color: var(--ink); }
.wedge-node-label { font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 10px; color: var(--mute); letter-spacing: 0.1em; margin-bottom: 6px; }
.wedge-node-name { font-size: 14px; font-weight: 500; }
.wedge-arrow { grid-column: span 1; text-align: center; color: var(--accent); font-size: 16px; }

/* 12 / PRINCIPLE LIST */
.principle-list { display: flex; flex-direction: column; }
.principle-row {
  display: grid; grid-template-columns: 1fr 4fr 6fr; gap: 24px; align-items: baseline;
  padding: 32px 0; border-bottom: 1px solid var(--rule);
}
.principle-row:first-child { border-top: 1px solid var(--rule); }
.principle-num { font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 13px; color: var(--accent); letter-spacing: 0.1em; font-weight: 500; }
.principle-title { font-size: 24px; line-height: 30px; letter-spacing: -0.02em; font-weight: 500; }
.principle-desc { color: var(--mute); }

/* 13 / TEAM */
.team-stack { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--rule); }
.team-row {
  display: grid; grid-template-columns: 1fr 3fr 6fr 2fr; gap: 32px;
  padding: 40px 0; border-bottom: 1px solid var(--rule); align-items: start;
}
.team-num { font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 13px; color: var(--accent); letter-spacing: 0.1em; font-weight: 500; }
.team-role { font-size: 22px; line-height: 28px; letter-spacing: -0.02em; font-weight: 500; }
.team-name { display: block; font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 11px; color: var(--mute); letter-spacing: 0.12em; text-transform: uppercase; margin-top: 8px; font-weight: 500; }
.team-desc { color: var(--mute); }
.team-status { font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 11px; color: var(--ink); letter-spacing: 0.12em; text-transform: uppercase; font-weight: 500; text-align: right; }

/* 14 / PATTERN BLOCKS (case page) */
.pattern-stack { display: flex; flex-direction: column; }
.pattern-row {
  display: grid; grid-template-columns: 1fr 4fr 6fr; gap: 32px;
  padding: 48px 0; border-bottom: 1px solid var(--rule); align-items: start;
}
.pattern-row:first-child { border-top: 1px solid var(--rule); }
.pattern-num { font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 13px; color: var(--accent); letter-spacing: 0.1em; font-weight: 500; }
.pattern-title { font-size: 26px; line-height: 32px; letter-spacing: -0.02em; font-weight: 500; }
.pattern-detail { display: flex; flex-direction: column; gap: 16px; }
.pattern-row-label { font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 10px; color: var(--accent-deep); letter-spacing: 0.1em; text-transform: uppercase; font-weight: 500; }
.pattern-row-text { font-size: 17px; line-height: 28px; color: var(--mute); }

/* 15 / DARK BLOCK */
.dark-block { background: var(--surface-dark); color: var(--paper); padding: var(--space-section) 0; text-align: center; }
.dark-inner { max-width: 800px; margin: 0 auto; padding: 0 var(--outer-padding); }
.dark-label { color: rgba(250, 250, 247, 0.6); margin-bottom: 32px; }
.dark-headline { color: var(--paper); margin-bottom: 32px; }
.dark-subline { color: rgba(250, 250, 247, 0.7); margin-bottom: 48px; max-width: 600px; margin-left: auto; margin-right: auto; }
.dark-email { display: block; margin-top: 32px; color: rgba(250, 250, 247, 0.5); font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 12px; letter-spacing: 0.12em; }

/* 16 / FOOTER */
.footer { background: var(--surface-dark); color: var(--paper); padding: 100px 0 32px; border-top: 1px solid rgba(250, 250, 247, 0.1); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 64px; margin-bottom: 80px; }
.footer-brand { font-size: 24px; font-weight: 500; letter-spacing: -0.02em; margin-bottom: 16px; }
.footer-brand-tag { color: rgba(250, 250, 247, 0.55); font-size: 14px; line-height: 22px; max-width: 260px; }
.footer-col-title { color: rgba(250, 250, 247, 0.5); margin-bottom: 24px; }
.footer-col-list { display: flex; flex-direction: column; gap: 12px; }
.footer-col-link { color: var(--paper); font-size: 15px; cursor: pointer; transition: opacity var(--transition); }
.footer-col-link:hover { opacity: 0.6; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 28px; border-top: 1px solid rgba(250, 250, 247, 0.1); color: rgba(250, 250, 247, 0.4); font-size: 13px; flex-wrap: wrap; gap: 16px; }

/* 17 / STAGE BANNER */
.stage-banner { background: var(--accent-soft); padding: 14px 0; text-align: center; border-bottom: 1px solid var(--rule); }
.stage-banner-text { font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 11px; color: var(--accent-deep); letter-spacing: 0.12em; text-transform: uppercase; font-weight: 500; }

/* 18 / SCOPE BLOCKS */
.scope-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.scope-col { padding: 48px; border-right: 1px solid var(--rule); }
.scope-col:last-child { border-right: 0; }
.scope-col-label { margin-bottom: 24px; }
.scope-list { display: flex; flex-direction: column; gap: 16px; }
.scope-list li { color: var(--mute); padding-left: 24px; position: relative; }
.scope-list li::before { content: '·'; position: absolute; left: 8px; color: var(--accent); font-weight: 500; }

/* 19 / INDUSTRY CARDS */
.industry-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--rule); border: 1px solid var(--rule); }
.industry-card { background: var(--paper); padding: 32px; transition: background var(--transition); }
.industry-card:hover { background: var(--accent-soft); }
.industry-card-num { font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 11px; color: var(--accent); letter-spacing: 0.12em; font-weight: 500; }
.industry-card-name { font-size: 22px; line-height: 28px; letter-spacing: -0.02em; font-weight: 500; margin-top: 12px; margin-bottom: 16px; }
.industry-card-desc { color: var(--mute); font-size: 15px; line-height: 24px; }

/* 20 / 404 */
.notfound { min-height: 80vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: 0 var(--outer-padding); }
.notfound-inner { max-width: 600px; }
.notfound-num { font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 13px; color: var(--accent); letter-spacing: 0.12em; margin-bottom: 24px; font-weight: 500; }
.notfound-headline { margin-bottom: 24px; }
.notfound-sub { color: var(--mute); margin-bottom: 40px; }

/* 21 / PAGES */
.page { padding-top: 72px; }

/* 22 / RESPONSIVE */
@media (max-width: 1100px) {
  :root { --outer-padding: 40px; --space-section: 100px; }
  .display-xl { font-size: 64px; line-height: 68px; }
  .display-lg { font-size: 44px; line-height: 50px; }
  .display-md { font-size: 28px; line-height: 34px; }
  .nav-items { display: none; }
  .nav-burger { display: flex; }
  .hero-diagram { display: none; }
  .hero-content { grid-column: 1 / 13; }
  .tool-card { grid-template-columns: 1fr; gap: 16px; padding: 24px; }
  .founder-grid { grid-template-columns: 1fr; }
  .founder-content { grid-column: auto; }
  .founder-photo { max-width: 280px; }
  .principle-row { grid-template-columns: auto 1fr; gap: 16px; }
  .principle-desc { grid-column: 2; }
  .team-row { grid-template-columns: auto 1fr; gap: 16px; }
  .team-desc, .team-status { grid-column: 2; }
  .team-status { text-align: left; }
  .pattern-row { grid-template-columns: auto 1fr; gap: 16px; }
  .pattern-detail { grid-column: 2; }
  .scope-grid { grid-template-columns: 1fr; }
  .scope-col { border-right: 0; border-bottom: 1px solid var(--rule); }
  .scope-col:last-child { border-bottom: 0; }
  .industry-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .wedge-flow { display: flex; flex-wrap: wrap; }
  .wedge-node, .wedge-arrow { grid-column: auto; }
  .wedge-node { flex: 1 1 130px; aspect-ratio: auto; padding: 16px; }
  .wedge-arrow { transform: rotate(90deg); }
}
@media (max-width: 600px) {
  :root { --outer-padding: 24px; }
  .display-xl { font-size: 44px; line-height: 48px; }
  .display-lg { font-size: 32px; line-height: 38px; }
  .display-md { font-size: 24px; line-height: 30px; }
  .footer-grid { grid-template-columns: 1fr; }
}