/* ATLAS PROTOCOL · Cream / Garamond design system (v2) */
/* Used across all pages on atlasprotocol.ai */

:root {
  --bg: #FBF9F4; /* warm cream — distinctive scholarly paper feel, pairs with EB Garamond */
  --surface: #FFFFFF;
  --surface-warm: #FFFFFF; /* keep cards + callouts pure white — no dirty beige */
  --border-warm: #E8E2D6;
  --border-hairline: rgba(10, 14, 39, 0.12);
  --text-primary: #0A0E27;
  --text-secondary: #475569;
  --text-tertiary: #6B7280;
  --accent: #475569; /* slate-600 — muted, smooth contrast against deep navy text */
  --accent-mute: rgba(71, 85, 105, 0.08); /* subtle slate tint */
  --rose: #92400E; /* burnt amber for negative/refusal — warm, not alarming */
  --font-serif: 'EB Garamond', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'kern' 1, 'liga' 1, 'calt' 1;
}
/* Serif headlines get true-typographic features: oldstyle nums + lining caps */
h1, h2, h3, h4, .pullquote, .invariant blockquote, .closing .we-do, .thesis-anchor {
  font-feature-settings: 'kern' 1, 'liga' 1, 'lnum' 1, 'ss01' 1;
}
/* Mono labels: lining nums + tabular */
.kicker, .brand, .nav-cta, .label-caps, code,
.primitive-mini .num, .product-card .card-num, .case-tile .case-num,
.tile-kicker, .tile-open, .uc-detail .uc-label, .footer-col h4 {
  font-feature-settings: 'kern' 1, 'tnum' 1, 'zero' 1;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
p { margin: 0 0 20px; }
strong { font-weight: 600; }

/* Selection */
::selection { background: var(--accent); color: var(--bg); }

/* Layout containers */
.container { max-width: 1080px; margin: 0 auto; padding: 0 32px; }
.container-narrow { max-width: 760px; margin: 0 auto; padding: 0 32px; }
.container-wide { max-width: 1280px; margin: 0 auto; padding: 0 32px; }

/* Nav */
.topnav {
  border-bottom: 1px solid var(--border-warm);
  background: rgba(251, 249, 244, 0.92);
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.nav-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 18px 32px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px;
}
.brand {
  font-family: var(--font-mono);
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--text-primary);
  display: inline-flex; align-items: center; gap: 8px;
}
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
  font-size: 14px; font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.15s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-cta {
  margin-left: auto;
  background: var(--text-primary);
  color: var(--bg);
  padding: 8px 16px;
  font-size: 13px; font-weight: 500;
  border-radius: 4px;
  transition: opacity 0.15s;
}
.nav-cta:hover { opacity: 0.85; }

/* Headers — Roman (non-italic) for restraint; italic reserved for emphasis + quotes */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-style: normal;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
h1.display {
  font-size: clamp(30px, 4.5vw, 56px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  margin: 0 0 20px;
}
/* Emphasis: heavy Roman for the single load-bearing word. No italic, no underline. */
h1.display .accent, .accent-underline,
h2 .accent, h3 .accent {
  position: relative;
  color: var(--text-primary);
  font-style: normal;
  font-weight: 800;
  letter-spacing: -0.018em; /* slight tightening so the heavy weight feels intentional */
}

/* Hero */
.hero {
  padding: 96px 0 64px;
  text-align: center;
}
.hero-left { text-align: left; }
.status-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px;
  background: var(--surface-warm);
  border: 1px solid var(--border-warm);
  border-radius: 999px;
  font-family: var(--font-mono); font-size: 10px; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 32px;
}
.pulse {
  display: inline-block; width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.85); }
}
.atom-badge {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--text-primary);
  border-radius: 3px;
  width: 22px; height: 22px;
  flex-shrink: 0;
}
.atom-badge svg { display: block; }
.atom-badge .orb-a {
  animation: orb-a 5s linear infinite;
  transform-origin: 16px 16px;
}
.atom-badge .orb-b {
  animation: orb-b 7s linear infinite;
  transform-origin: 16px 16px;
}
.atom-badge .orb-c {
  animation: orb-c 9s linear infinite;
  transform-origin: 16px 16px;
}
@keyframes orb-a {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
@keyframes orb-b {
  from { transform: rotate(60deg); }
  to   { transform: rotate(420deg); }
}
@keyframes orb-c {
  from { transform: rotate(120deg); }
  to   { transform: rotate(480deg); }
}
.lede {
  font-size: 17px; line-height: 1.55;
  color: var(--text-secondary);
  max-width: 680px; margin: 0 auto 20px;
  letter-spacing: -0.003em;
}
.hero-left .lede { margin-left: 0; margin-right: 0; }
.study-lede {
  font-size: 16px; line-height: 1.65;
  color: var(--text-secondary);
  max-width: 680px; margin: 0 auto 36px;
  padding: 14px 24px;
  border-left: 2px solid var(--accent);
  background: var(--surface-warm);
  text-align: left;
}

/* CTA / buttons */
.cta-row {
  display: flex; gap: 12px; flex-wrap: wrap;
  justify-content: center; align-items: center;
  margin-top: 24px;
}
.cta-row.left { justify-content: flex-start; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 12px 22px;
  font-size: 14px; font-weight: 500;
  border-radius: 4px;
  border: 1px solid var(--text-primary);
  background: transparent;
  color: var(--text-primary);
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
  cursor: pointer;
  font-family: var(--font-sans);
  letter-spacing: 0.01em;
}
.btn:hover {
  background: var(--text-primary);
  color: var(--bg);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(10, 14, 39, 0.08);
}
.btn:active { transform: translateY(0); box-shadow: none; }
.btn.primary {
  background: var(--text-primary);
  color: var(--bg);
}
.btn.primary:hover {
  background: var(--text-primary);
  opacity: 0.92;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(10, 14, 39, 0.12);
}
.btn.ghost {
  border-color: var(--border-warm);
  color: var(--text-secondary);
}
.btn.ghost:hover {
  border-color: var(--text-primary);
  background: transparent;
  color: var(--text-primary);
}

/* Labels */
.kicker {
  font-family: var(--font-mono); font-size: 10px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-secondary);
}

/* Three primitive mini-cards */
.primitives-mini {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
  margin: 64px auto 0;
}
.primitive-mini {
  padding: 28px 24px;
  background: var(--surface);
  border: 1px solid var(--border-warm);
  border-top: 2px solid var(--accent);
  border-radius: 4px;
}
.primitive-mini .num {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.14em; color: var(--text-tertiary);
  margin-bottom: 16px;
}
.primitive-mini h3 {
  font-size: 20px; line-height: 1.2;
  margin: 0 0 10px;
}
.primitive-mini p {
  margin: 0; font-size: 13px; line-height: 1.55;
  color: var(--text-secondary);
}

/* Pull quote */
.pullquote {
  margin: 80px auto 0;
  padding: 24px 32px;
  border-top: 1px solid var(--border-warm);
  border-bottom: 1px solid var(--border-warm);
  font-family: var(--font-serif); font-style: italic;
  font-size: 18px; line-height: 1.45;
  color: var(--text-primary);
  text-align: center;
}
.pullquote.tight {
  font-size: 19px;
  padding: 20px 24px;
  margin: 32px auto;
}
.pullquote strong, .pullquote em {
  font-weight: 500;
  color: var(--accent);
  font-style: italic;
}

/* Essay */
.essay {
  margin: 96px auto 0;
  max-width: 760px;
  padding: 0 32px;
}
.essay h2 {
  font-size: clamp(21px, 2.6vw, 32px); line-height: 1.2;
  margin: 0 0 20px;
}
.essay h2 .section-num {
  font-family: var(--font-mono);
  font-style: normal; font-weight: 500;
  color: var(--accent);
  font-size: 0.6em;
  margin-right: 10px;
  vertical-align: 0.18em;
}
.essay h3 {
  font-size: 19px; line-height: 1.25;
  margin: 28px 0 14px;
}
.essay p {
  font-size: 15px; line-height: 1.7;
  color: var(--text-primary);
}
.essay p.lead-graf {
  font-size: 16px; line-height: 1.65;
}
.essay em { font-style: italic; color: var(--accent); }
.essay ul, .essay ol {
  font-size: 17px; line-height: 1.7;
  color: var(--text-primary);
  padding-left: 24px;
}
.essay li { margin-bottom: 8px; }

/* Tables (used in evidence/architecture) */
.essay table, .container-wide table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 15px;
}
.essay table thead, .container-wide table thead {
  border-bottom: 1px solid var(--text-primary);
}
.essay table th, .container-wide table th {
  font-family: var(--font-mono); font-size: 10px; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-secondary);
  text-align: left;
  padding: 12px 16px 12px 0;
}
.essay table td, .container-wide table td {
  padding: 14px 16px 14px 0;
  border-bottom: 1px solid var(--border-warm);
  vertical-align: top;
  color: var(--text-primary);
  line-height: 1.55;
}
.essay table td code, .container-wide table td code {
  font-family: var(--font-mono); font-size: 13px;
  background: var(--surface-warm);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--text-primary);
}

/* Code */
code {
  font-family: var(--font-mono); font-size: 0.92em;
  background: var(--surface-warm);
  padding: 2px 6px;
  border-radius: 3px;
}

/* Figures */
figure.figure-block, figure.svg-hero, figure.stack-figure {
  margin: 64px auto 0;
  max-width: 1080px;
  padding: 0 32px;
  text-align: center;
}
figure img {
  max-width: 100%;
  background: var(--surface);
  padding: 24px;
  border: 1px solid var(--border-warm);
  border-radius: 4px;
}
figure figcaption {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
  margin-top: 16px;
}

/* Envelope diagram block */
.diagram-block {
  margin: 64px auto 0;
  max-width: 880px;
  padding: 48px 32px;
  background: var(--surface);
  border: 1px solid var(--border-warm);
  border-radius: 4px;
  text-align: center;
}
.diagram-block svg {
  max-width: 100%; height: auto;
  margin: 0 auto;
}
.diagram-block .caption {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-tertiary);
  margin-top: 24px;
}

/* Wedge callout (compliance richness) */
.wedge {
  margin: 96px auto 0;
  max-width: 1080px;
  padding: 56px 48px;
  background: var(--surface);
  border: 1px solid var(--border-warm);
  border-radius: 4px;
}
.wedge .wedge-headline {
  font-family: var(--font-serif); font-style: italic; font-weight: 500;
  font-size: clamp(19px, 2.2vw, 27px); line-height: 1.3;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 36px;
  letter-spacing: -0.005em;
}
.leak-grid {
  display: flex; flex-direction: column; gap: 24px;
  max-width: 720px; margin: 0 auto;
}
.leak-row {
  display: grid; grid-template-columns: 140px 1fr; gap: 24px; align-items: center;
}
.leak-label {
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-secondary);
}
.leak-row.spread {
  padding-top: 24px;
  border-top: 1px solid var(--border-warm);
  margin-top: 0;
}
.leak-row.spread .leak-label {
  font-size: 9.5px;
  letter-spacing: 0.07em;
  white-space: nowrap;
}
.leak-arms { display: flex; flex-direction: column; gap: 8px; }
.leak-arm {
  display: grid; grid-template-columns: 80px 1fr 60px; gap: 12px; align-items: center;
}
.arm-label {
  font-family: var(--font-mono); font-size: 10px; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-tertiary);
}
.arm-bar {
  height: 6px; background: rgba(10, 14, 39, 0.06);
  border-radius: 999px; overflow: hidden;
  position: relative;
}
.arm-bar.empty {
  background: transparent;
  border: 1px solid var(--accent);
  height: 4px;
  overflow: visible;
}
.arm-fill {
  display: block; height: 100%;
  background: var(--rose);
  border-radius: 999px;
}
.arm-pct {
  font-family: var(--font-mono); font-size: 13px; font-weight: 600;
  color: var(--rose);
  text-align: right;
}
.arm-pct.zero { color: var(--accent); }
.wedge-footer {
  margin-top: 32px; text-align: center;
  font-size: 14px; line-height: 1.6;
  color: var(--text-secondary);
  max-width: 720px; margin-left: auto; margin-right: auto;
  font-style: italic;
  font-family: var(--font-serif);
}

/* Product cards (detailed three primitives) */
.product-cards {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  margin: 64px auto 0;
}
.product-card {
  padding: 36px 28px;
  background: var(--surface);
  border: 1px solid var(--border-warm);
  border-radius: 4px;
  position: relative;
}
.product-card .card-num {
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.14em; color: var(--text-tertiary);
  margin-bottom: 20px;
}
.product-card h3 {
  font-size: 21px; line-height: 1.15;
  margin: 0 0 14px;
}
.product-card .pc-tag {
  font-family: var(--font-serif); font-style: italic;
  color: var(--accent);
  font-size: 14px; line-height: 1.45;
  margin: 0 0 14px;
}
.product-card p:not(.pc-tag) {
  margin: 0; font-size: 13px; line-height: 1.65;
  color: var(--text-secondary);
}

/* Use cases */
.use-cases {
  display: grid; grid-template-columns: 1fr; gap: 32px;
  margin: 56px auto 0; max-width: 880px;
  padding: 0 32px;
}
.use-case {
  padding: 36px 36px;
  background: var(--surface);
  border: 1px solid var(--border-warm);
  border-left: 2px solid var(--accent);
  border-radius: 4px;
}
.use-case h3 {
  font-size: 19px; line-height: 1.2;
  margin: 0 0 16px;
}
.use-case p {
  margin: 0 0 12px; font-size: 14px; line-height: 1.65;
  color: var(--text-secondary);
}
.use-case p:last-child { margin-bottom: 0; }
.use-case p strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Use-cases index cards */
.case-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
  margin: 56px auto 0;
}
.case-tile {
  padding: 28px 28px;
  background: var(--surface);
  border: 1px solid var(--border-warm);
  border-radius: 4px;
  transition: border-color 0.15s, transform 0.15s;
  display: block;
}
.case-tile:hover {
  border-color: var(--text-primary);
  transform: translateY(-1px);
}
.case-tile .case-num {
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.14em; color: var(--accent);
  margin-bottom: 14px;
}
.case-tile h3 {
  font-size: 24px; line-height: 1.2;
  margin: 0 0 12px;
}
.case-tile p {
  margin: 0; font-size: 15px; line-height: 1.6;
  color: var(--text-secondary);
}

/* Closing CTA */
.closing {
  margin: 96px auto 0;
  max-width: 880px;
  text-align: center;
  padding: 64px 32px 80px;
}
.closing p {
  font-size: 18px; line-height: 1.7;
  color: var(--text-secondary);
  max-width: 720px; margin: 0 auto 16px;
}
.closing .we-do {
  font-family: var(--font-serif); font-style: italic; font-weight: 500;
  font-size: clamp(26px, 3vw, 38px);
  color: var(--text-primary);
  margin: 20px 0 28px;
}

/* Final invariant quote */
.invariant {
  margin: 96px auto 0;
  padding: 96px 32px;
  border-top: 1px solid var(--border-warm);
  border-bottom: 1px solid var(--border-warm);
  text-align: center;
  background: var(--surface-warm);
}
.invariant blockquote {
  font-family: var(--font-serif); font-style: italic; font-weight: 500;
  font-size: clamp(26px, 4vw, 50px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin: 0; max-width: 920px; margin-left: auto; margin-right: auto;
}
.invariant blockquote .accent {
  position: relative;
  font-style: normal;
  font-weight: 800;
  letter-spacing: -0.018em;
}

/* Section nums for in-page H2s */
.section-num {
  font-family: var(--font-mono);
  font-style: normal; font-weight: 500;
  color: var(--accent);
  font-size: 0.6em;
  margin-right: 10px;
}

/* Architecture path / step diagrams */
.arch-path {
  display: flex; align-items: center; justify-content: center;
  gap: 14px; flex-wrap: wrap;
  margin: 32px auto;
  max-width: 880px;
}
.arch-path .step {
  padding: 10px 18px;
  background: var(--surface);
  border: 1px solid var(--border-warm);
  border-radius: 4px;
  font-family: var(--font-mono); font-size: 13px; font-weight: 500;
  color: var(--text-primary);
}
.arch-path .arrow {
  font-family: var(--font-mono); font-size: 18px;
  color: var(--accent);
}

/* Footer */
footer {
  margin-top: 96px;
  border-top: 1px solid var(--border-warm);
  padding: 64px 32px 48px;
}
.footer-grid, footer > .container-wide {
  max-width: 1080px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px;
}
.footer-brand {
  font-family: var(--font-mono); font-size: 14px; font-weight: 600;
  letter-spacing: 0.14em;
  margin-bottom: 8px;
}
.footer-tagline {
  color: var(--text-secondary);
  font-size: 14px; line-height: 1.6;
  max-width: 280px; margin: 0;
}
.footer-col h4 {
  font-family: var(--font-mono); font-size: 10px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-tertiary);
  font-style: normal;
  margin: 0 0 12px;
}
.footer-col a {
  display: block;
  font-size: 14px; color: var(--text-secondary);
  padding: 4px 0;
  transition: color 0.15s;
}
.footer-col a:hover { color: var(--text-primary); }
.footer-line {
  max-width: 1080px; margin: 48px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border-warm);
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  text-align: center;
}

/* Responsive */
@media (max-width: 900px) {
  .primitives-mini { grid-template-columns: 1fr; }
  .product-cards { grid-template-columns: 1fr; }
  .footer-grid, footer > .container-wide { grid-template-columns: 1fr 1fr; }
  .footer-grid > div:first-child, footer > .container-wide > div:first-child { grid-column: 1 / -1; }
  .leak-row { grid-template-columns: 1fr; gap: 12px; }
  .case-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero { padding: 64px 0 48px; }
  .essay { margin-top: 64px; }
  .wedge { padding: 36px 24px; }
  .footer-grid, footer > .container-wide { grid-template-columns: 1fr; }
}