/* ==========================================================================
   DevOps AI Implementation Ideas — static site
   Design language: "teal terminal on paper" (see DESIGN.md)
   Paper canvas · JetBrains Mono display type · teal punctuation · hairline grids
   ========================================================================== */

/* ---- Fonts (Google Fonts) ---- */
/* JetBrains Mono (display + code) · Inter (body) */

:root {
  /* Colors */
  --color-paper: #f3f2f1;
  --color-white: #ffffff;
  --color-ink: #1c1917;
  --color-charcoal: #272321;
  --color-deep-graphite: #3a3532;
  --color-warm-gray: #7c716a;
  --color-steel: #aaa29d;
  --color-rule-gray: #cac6c3;
  --color-aqua-mist: #d3f3f3;
  --color-aqua-midtone: #8dd9d9;
  --color-outline-aqua: #9fe4e4;
  --color-butler-teal: #25b1b1;
  --color-deep-teal: #1d8a8a;

  /* Typography */
  --font-display: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-inter: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-geist-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* Legacy alias — old name kept so existing rules keep working */
  --font-but-head: var(--font-display);

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-pill: 60px;
  --radius-badge: 100px;

  /* Elevation */
  --shadow-terminal: 0 1px 6px 0 rgba(0, 0, 0, 0.1), 0 24px 44px 3px rgba(0, 0, 0, 0.2);
  --shadow-panel: inset 0 4px 100px 0 rgb(58, 53, 50);
  --shadow-dialog: 0 1px 6px 0 rgba(0, 0, 0, 0.1), 0 24px 64px 6px rgba(0, 0, 0, 0.25);

  --container: 1120px;
}

/* ---- Reset & base ---- */

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-inter);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; }

a { color: inherit; }

button {
  font-family: inherit;
  cursor: pointer;
}

::selection { background: var(--color-aqua-mist); }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* Dotted technical texture (used sparingly behind hero + CTA) */
.dot-texture {
  background-image: radial-gradient(rgba(28, 25, 23, 0.14) 1px, transparent 1px);
  background-size: 22px 22px;
}

/* ---- Typography helpers ---- */

.display {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(32px, 5.5vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin: 0;
  text-wrap: balance;
}

.section-heading {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0;
  text-wrap: balance;
}

.body-copy {
  color: var(--color-warm-gray);
  font-size: 16px;
  line-height: 1.6;
  margin: 0;
}

.mono { font-family: var(--font-geist-mono); }

.eyebrow {
  font-family: var(--font-geist-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-deep-teal);
  margin: 0 0 16px;
}

.eyebrow::before { content: "// "; color: var(--color-butler-teal); }

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.2;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn-square {
  border: 1px solid var(--color-ink);
  border-radius: 0;
  padding: 12px 20px;
  color: var(--color-ink);
  background: transparent;
}

.btn-square:hover { background: var(--color-ink); color: var(--color-white); }

.btn-teal {
  border: none;
  border-radius: 8px;
  padding: 12px 20px;
  background: var(--color-butler-teal);
  color: var(--color-white);
}

.btn-teal:hover { background: var(--color-deep-teal); }

.btn-white {
  border: none;
  border-radius: 0;
  padding: 12px 20px;
  background: var(--color-white);
  color: var(--color-ink);
}

.btn-white:hover { background: var(--color-ink); color: var(--color-white); }

.btn-ghost-white {
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 0;
  padding: 12px 20px;
  background: transparent;
  color: var(--color-white);
}

.btn-ghost-white:hover { background: rgba(255, 255, 255, 0.14); }

.btn:active { transform: translateY(1px); }

/* ---- Badges & pills ---- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-white);
  border-radius: var(--radius-badge);
  padding: 8px 12px;
  color: var(--color-deep-teal);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.35;
  border: 1px solid var(--color-rule-gray);
}

.badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-butler-teal);
  flex: none;
}

.area-tag {
  display: inline-block;
  font-family: var(--font-geist-mono);
  font-size: 11px;
  line-height: 1;
  letter-spacing: 0.04em;
  padding: 5px 8px;
  border: 1px solid var(--color-rule-gray);
  border-radius: var(--radius-badge);
  color: var(--color-deep-teal);
  background: var(--color-white);
  white-space: nowrap;
}

/* ---- Header ---- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(243, 242, 241, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.site-header.scrolled {
  border-bottom-color: var(--color-rule-gray);
  box-shadow: 0 8px 24px rgba(28, 25, 23, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 76px;
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1;
  letter-spacing: -0.03em;
  text-decoration: none;
  white-space: nowrap;
}

.wordmark .amp { color: var(--color-butler-teal); font-style: italic; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 8px;
}

.site-nav a.nav-link:hover { background: var(--color-aqua-mist); }

.site-nav a.nav-link.active { background: var(--color-aqua-mist); color: var(--color-deep-teal); }

/* Mobile nav toggle + dropdown menu */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-ink);
  border-radius: 8px;
  background: transparent;
  color: var(--color-ink);
}

.nav-toggle[aria-expanded="true"] { background: var(--color-ink); color: var(--color-white); }

.mobile-menu {
  display: none;
  border-top: 1px solid var(--color-rule-gray);
  background: var(--color-paper);
  padding: 4px 24px 12px;
}

.mobile-menu.open { display: block; }

.mobile-menu a {
  display: block;
  padding: 13px 4px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--color-rule-gray);
}

.mobile-menu nav a:last-child { border-bottom: none; }
.mobile-menu a:active { color: var(--color-deep-teal); }

@media (max-width: 720px) {
  .site-nav .nav-link { display: none; }
  .nav-toggle { display: inline-flex; }
}

@media (min-width: 721px) {
  .mobile-menu { display: none !important; }
}

@media (max-width: 520px) {
  .header-inner { gap: 12px; }
  .site-nav .btn-square { display: none; }
}

/* ---- Hero ---- */

.hero {
  padding: 72px 0 40px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 420px;
  background-image: radial-gradient(rgba(28, 25, 23, 0.10) 1px, transparent 1px);
  background-size: 22px 22px;
  mask-image: linear-gradient(to bottom, black 40%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 40%, transparent 100%);
  pointer-events: none;
}

.hero-inner { position: relative; }

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.hero .display { max-width: 19ch; }

.hero .display .teal { color: var(--color-butler-teal); }

.hero-sub {
  max-width: 560px;
  margin-top: 24px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

/* ---- Terminal demo ---- */

.terminal {
  margin-top: 56px;
  border-radius: var(--radius-md);
  background: var(--color-white);
  box-shadow: var(--shadow-terminal);
  overflow: hidden;
  max-width: 860px;
}

.terminal-chrome {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid #eceae8;
}

.terminal-chrome .c { width: 10px; height: 10px; border-radius: 50%; background: var(--color-rule-gray); }
.terminal-chrome .c:first-child { background: var(--color-aqua-midtone); }
.terminal-chrome .title {
  margin-left: 10px;
  font-family: var(--font-geist-mono);
  font-size: 11px;
  color: var(--color-steel);
}

.terminal-body {
  background: var(--color-charcoal);
  padding: 24px;
  font-family: var(--font-geist-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-white);
  overflow-x: auto;
}

.terminal-body .t-prompt { color: var(--color-butler-teal); }
.terminal-body .t-arg { color: var(--color-outline-aqua); }
.terminal-body .t-dim { color: var(--color-steel); }
.terminal-body .t-ok { color: var(--color-outline-aqua); }
.terminal-body .t-key { color: var(--color-butler-teal); }
.terminal-body .t-val { color: var(--color-white); }
.terminal-body .t-cmd { color: var(--color-white); }

.cursor {
  display: inline-block;
  width: 8px;
  height: 16px;
  background: var(--color-outline-aqua);
  vertical-align: text-bottom;
  animation: blink 1.1s steps(1) infinite;
}

@keyframes blink { 50% { opacity: 0; } }

/* Terminal lines fade in one by one (spans injected by app.js) */
.terminal-body .t-line {
  display: inline-block;
  opacity: 0;
  animation: line-in 0.35s ease forwards;
  animation-delay: calc(var(--l, 0) * 0.16s);
}

@keyframes line-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; }
  .terminal-body .t-line { animation: none; opacity: 1; }
  .demo-line { animation: none; opacity: 1; }
  .marquee-track { animation: none; }
  .card { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:active { transform: none; }
  html { scroll-behavior: auto; }
}

/* ---- Stats band ---- */

.stats {
  border-top: 1px solid var(--color-rule-gray);
  border-bottom: 1px solid var(--color-rule-gray);
  margin-top: 64px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stat {
  padding: 28px 24px;
  border-left: 1px solid var(--color-rule-gray);
}

.stat:first-child { border-left: none; }

.stat .num {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(30px, 3.6vw, 42px);
  line-height: 1;
  color: var(--color-ink);
  letter-spacing: -0.02em;
}

.stat .num .unit { color: var(--color-butler-teal); }

.stat .label {
  margin-top: 8px;
  font-size: 13px;
  color: var(--color-warm-gray);
}

@media (max-width: 760px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: none; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--color-rule-gray); }
}

/* ---- Sections ---- */

.section { padding: 88px 0; }

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.section-head .body-copy { max-width: 480px; }

/* ---- Feature grid (hairline 2×3) ---- */

.hairline-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-rule-gray);
  border: 1px solid var(--color-rule-gray);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

@media (max-width: 900px) { .hairline-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .hairline-grid { grid-template-columns: 1fr; } }

.tile {
  background: var(--color-paper);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tile .icon {
  color: var(--color-ink);
}

.tile h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-ink);
}

.tile p {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--color-warm-gray);
}

/* ---- Platform landscape ---- */

.platform-tile { background: var(--color-white); }

.platform-tile .p-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
}

.platform-tile .p-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.platform-tile .p-list li {
  font-family: var(--font-geist-mono);
  font-size: 12px;
  color: var(--color-warm-gray);
  border: 1px solid var(--color-rule-gray);
  border-radius: var(--radius-badge);
  padding: 4px 10px;
  background: var(--color-paper);
}

/* ---- Catalog toolbar ---- */

.catalog-toolbar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 8px;
  position: sticky;
  top: 75px;
  z-index: 20;
  background: var(--color-paper);
  padding: 12px 0 10px;
}

.toolbar-row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.toolbar-select {
  appearance: none;
  -webkit-appearance: none;
  border: 1px solid var(--color-rule-gray);
  background: var(--color-white);
  border-radius: 0;
  padding: 11px 32px 11px 12px;
  font-family: var(--font-geist-mono);
  font-size: 13px;
  color: var(--color-ink);
  cursor: pointer;
  outline: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%237c716a' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  transition: border-color 0.15s ease;
}

.toolbar-select:hover { border-color: var(--color-steel); }
.toolbar-select:focus { border-color: var(--color-butler-teal); box-shadow: 0 0 0 3px var(--color-aqua-mist); }

.random-btn {
  border: 1px solid var(--color-ink);
  border-radius: 0;
  background: transparent;
  padding: 11px 16px;
  font-family: var(--font-geist-mono);
  font-size: 13px;
  color: var(--color-ink);
  transition: background 0.15s ease, color 0.15s ease;
}

.random-btn:hover { background: var(--color-ink); color: var(--color-white); }
.random-btn .rb-prompt { color: var(--color-butler-teal); margin-right: 4px; }
.random-btn:hover .rb-prompt { color: var(--color-aqua-midtone); }

/* Don't pin the toolbar over small screens — it would eat too much viewport */
@media (max-width: 720px) {
  .catalog-toolbar { position: static; padding-top: 0; }
}

.search-wrap {
  flex: 1 1 260px;
  position: relative;
  max-width: 380px;
}

.search-wrap svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-steel);
  pointer-events: none;
}

#search {
  width: 100%;
  border: 1px solid var(--color-rule-gray);
  background: var(--color-white);
  border-radius: 0;
  padding: 11px 12px 11px 36px;
  font-family: var(--font-geist-mono);
  font-size: 13px;
  color: var(--color-ink);
  outline: none;
}

#search:focus { border-color: var(--color-butler-teal); box-shadow: 0 0 0 3px var(--color-aqua-mist); }
#search::placeholder { color: var(--color-steel); }

/* Segmented view toggle (Grid / Index) — 60px radius pill */
.segmented {
  display: inline-flex;
  border: 1px solid var(--color-rule-gray);
  border-radius: var(--radius-pill);
  background: var(--color-white);
  padding: 3px;
  margin-left: auto;
}

.segmented button {
  border: none;
  background: transparent;
  border-radius: var(--radius-pill);
  padding: 8px 18px;
  font-family: var(--font-but-head);
  font-size: 15px;
  line-height: 1;
  color: var(--color-ink);
}

.segmented button.active {
  background: var(--color-deep-graphite);
  color: var(--color-white);
}

/* Area tab strip — contiguous white tabs, teal top rule on active */
.tab-strip {
  display: flex;
  overflow-x: auto;
  border: 1px solid var(--color-rule-gray);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  scrollbar-width: thin;
  scrollbar-color: var(--color-rule-gray) transparent;
}

.tab-strip::-webkit-scrollbar { height: 6px; }
.tab-strip::-webkit-scrollbar-track { background: transparent; }
.tab-strip::-webkit-scrollbar-thumb { background: var(--color-rule-gray); border-radius: 3px; }

.tab-strip button {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  border-right: 1px solid var(--color-rule-gray);
  background: transparent;
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-ink);
  position: relative;
  white-space: nowrap;
}

.tab-strip button:last-child { border-right: none; }

.tab-strip button .count {
  font-family: var(--font-geist-mono);
  font-size: 11px;
  color: var(--color-steel);
}

.tab-strip button:hover { background: var(--color-paper); }

.tab-strip button.active { box-shadow: inset 0 4px 0 0 var(--color-butler-teal); }
.tab-strip button.active .count { color: var(--color-deep-teal); }

.result-count {
  font-family: var(--font-geist-mono);
  font-size: 12px;
  color: var(--color-warm-gray);
  margin: 16px 0;
}

/* Search match highlighting */
mark {
  background: var(--color-aqua-mist);
  color: var(--color-deep-teal);
  border-radius: 2px;
  padding: 0 1px;
}

/* ---- Idea cards ---- */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-rule-gray);
  border: 1px solid var(--color-rule-gray);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

@media (max-width: 980px) { .cards-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .cards-grid { grid-template-columns: 1fr; } }

/* Blank cell padding the last row of the 3-column grid */
.card-filler { background: var(--color-paper); }
@media (max-width: 980px) { .card-filler { display: none; } }

.card {
  background: var(--color-paper);
  border: none;
  text-align: left;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 208px;
  transition: background 0.15s ease;
}

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

.card .num::after {
  content: " →";
  display: inline-block;
  color: var(--color-butler-teal);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.card:hover .num::after,
.card:focus-visible .num::after { opacity: 1; transform: none; }

.card h3 { transition: color 0.15s ease; }
.card:hover h3 { color: var(--color-deep-graphite); }

/* Staggered entrance (index injected by app.js) */
.card {
  animation: card-in 0.3s ease both;
  animation-delay: calc(min(var(--i, 0), 12) * 30ms);
}

@keyframes card-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.card:focus-visible {
  outline: 2px solid var(--color-butler-teal);
  outline-offset: -2px;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.card .num {
  font-family: var(--font-geist-mono);
  font-size: 13px;
  color: var(--color-deep-teal);
}

.card h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-ink);
}

.card .tldr {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-warm-gray);
  flex: 1;
}

.card-meta {
  display: flex;
  gap: 12px;
  font-family: var(--font-geist-mono);
  font-size: 11px;
  color: var(--color-steel);
}

.card-meta span::before { content: "· "; color: var(--color-rule-gray); }
.card-meta span:first-child::before { content: ""; }

/* Index (list) view */

.index-table {
  border: 1px solid var(--color-rule-gray);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-white);
}

.index-row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 180px max-content;
  gap: 16px;
  align-items: center;
  width: 100%;
  border: none;
  border-bottom: 1px solid var(--color-rule-gray);
  background: transparent;
  padding: 12px 16px;
  text-align: left;
  font-family: var(--font-geist-mono);
  font-size: 13px;
  color: var(--color-ink);
}

.index-row:last-child { border-bottom: none; }
.index-row:hover { background: var(--color-aqua-mist); }
.index-row .i-num { color: var(--color-deep-teal); }
.index-row .i-name { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.index-row .i-area { color: var(--color-warm-gray); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.index-row .i-meta { color: var(--color-steel); text-align: right; white-space: nowrap; }

@media (max-width: 760px) {
  .index-row { grid-template-columns: 40px 1fr; }
  .index-row .i-area, .index-row .i-meta { display: none; }
}

.empty-state {
  border: 1px dashed var(--color-rule-gray);
  border-radius: var(--radius-sm);
  padding: 48px 24px;
  text-align: center;
  color: var(--color-warm-gray);
}

.empty-state svg { margin: 0 auto 12px; color: var(--color-steel); }

.empty-state button {
  margin-top: 12px;
}

/* ---- Scroll reveal (classes injected by app.js) ---- */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  transition-delay: var(--reveal-delay, 0ms);
}

.reveal.in { opacity: 1; transform: none; }

/* ---- Modal ---- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(28, 25, 23, 0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 4vh 16px;
  z-index: 100;
  overflow-y: auto;
}

.modal-overlay.open { display: flex; }

.modal {
  background: var(--color-paper);
  border-radius: var(--radius-md);
  width: min(880px, 100%);
  box-shadow: var(--shadow-dialog);
  animation: modal-in 0.18s ease;
}

@keyframes modal-in {
  from { transform: translateY(10px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .modal { animation: none; }
}

.modal-head {
  position: sticky;
  top: 0;
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-rule-gray);
  padding: 20px 24px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  z-index: 2;
}

.modal-head .m-num {
  font-family: var(--font-geist-mono);
  font-size: 13px;
  color: var(--color-deep-teal);
  margin-bottom: 6px;
}

.modal-head h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.modal-head .m-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.modal-close {
  flex: none;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-rule-gray);
  background: var(--color-white);
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  color: var(--color-ink);
}

.modal-close:hover { background: var(--color-ink); color: var(--color-white); }

.modal-body { padding: 24px; display: flex; flex-direction: column; gap: 36px; }

.m-section h4 {
  margin: 0 0 12px;
  font-family: var(--font-geist-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-deep-teal);
}

.m-section p { margin: 0 0 10px; color: var(--color-ink); font-size: 15px; line-height: 1.6; }
.m-section p.dim { color: var(--color-warm-gray); }
.m-section ul { margin: 0; padding-left: 18px; color: var(--color-ink); font-size: 15px; line-height: 1.65; }
.m-section ol { margin: 0; padding-left: 20px; font-size: 15px; line-height: 1.65; }
.m-section li::marker { color: var(--color-butler-teal); }
.m-section li b { font-weight: 600; }

.impact-note {
  border-left: 3px solid var(--color-butler-teal);
  background: var(--color-aqua-mist);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14px !important;
  color: var(--color-ink) !important;
}

.m-diagram {
  background: var(--color-charcoal);
  border-radius: var(--radius-sm);
  padding: 20px;
  overflow-x: auto;
  box-shadow: var(--shadow-panel);
}

.m-diagram pre {
  margin: 0;
  font-family: var(--font-geist-mono);
  font-size: 12px;
  line-height: 1.45;
  color: var(--color-outline-aqua);
  white-space: pre;
}

.m-diagram .diag-title {
  font-family: var(--font-geist-mono);
  font-size: 11px;
  color: var(--color-steel);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.m-table { width: 100%; border-collapse: collapse; font-size: 14px; }

.m-table th {
  text-align: left;
  font-family: var(--font-geist-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-warm-gray);
  border-bottom: 1px solid var(--color-ink);
  padding: 8px 12px 8px 0;
}

.m-table td {
  border-bottom: 1px solid var(--color-rule-gray);
  padding: 10px 12px 10px 0;
  vertical-align: top;
  color: var(--color-ink);
}

.m-table td:first-child { font-weight: 500; white-space: nowrap; }
.m-table td:last-child { color: var(--color-warm-gray); }

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

.chips .chip {
  font-family: var(--font-geist-mono);
  font-size: 12px;
  color: var(--color-ink);
  background: var(--color-white);
  border: 1px solid var(--color-rule-gray);
  border-radius: var(--radius-badge);
  padding: 6px 12px;
}

.chips .chip.clickable { cursor: pointer; }
.chips .chip.clickable:hover { border-color: var(--color-butler-teal); color: var(--color-deep-teal); }

.modal-foot {
  border-top: 1px solid var(--color-rule-gray);
  padding: 16px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.modal-foot .mf-left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Prev / next idea navigation inside the modal */
.m-nav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.m-nav-btn {
  width: 32px;
  height: 32px;
  border: 1px solid var(--color-rule-gray);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-ink);
  font-size: 18px;
  line-height: 1;
  display: grid;
  place-items: center;
  padding: 0;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.m-nav-btn:hover { background: var(--color-ink); color: var(--color-white); border-color: var(--color-ink); }

.m-nav-count {
  font-family: var(--font-geist-mono);
  font-size: 12px;
  color: var(--color-deep-teal);
  min-width: 5ch;
  text-align: center;
}

.modal-foot .links { display: flex; gap: 12px; flex-wrap: wrap; }

.modal-foot .pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--color-rule-gray);
  border-radius: var(--radius-pill);
  background: var(--color-white);
  padding: 10px 16px;
  font-size: 14px;
  color: var(--color-warm-gray);
  text-decoration: none;
}

.modal-foot .pill:hover { border-color: var(--color-ink); color: var(--color-ink); }

/* ---- Platform ticker ---- */

.marquee {
  overflow: hidden;
  border-top: 1px solid var(--color-rule-gray);
  border-bottom: 1px solid var(--color-rule-gray);
  padding: 18px 0;
  background: var(--color-white);
}

.marquee-track {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  width: max-content;
  animation: marquee-scroll 48s linear infinite;
}

.marquee:hover .marquee-track { animation-play-state: paused; }

.marquee-item {
  font-family: var(--font-geist-mono);
  font-size: 13px;
  color: var(--color-warm-gray);
}

.marquee-item .sep {
  font-style: normal;
  color: var(--color-butler-teal);
  margin: 0 22px;
  font-size: 11px;
}

@keyframes marquee-scroll {
  to { transform: translateX(-50%); }
}

/* ---- Living demos ---- */

.demo-terminal { max-width: 860px; }

.demo-terminal .terminal-body { min-height: 300px; }

.demo-line {
  display: inline-block;
  opacity: 0;
  animation: line-in 0.25s ease forwards;
}

/* ---- Idea atlas ---- */

.atlas-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-bottom: 24px;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-geist-mono);
  font-size: 12px;
  color: var(--color-warm-gray);
}

.legend-item .swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  border: 1px solid var(--color-rule-gray);
}

.atlas-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 6px;
}

@media (max-width: 900px) { .atlas-grid { grid-template-columns: repeat(5, 1fr); } }
@media (max-width: 520px) { .atlas-grid { grid-template-columns: repeat(4, 1fr); } }

.atlas-cell {
  aspect-ratio: 1;
  border: 1px solid var(--color-rule-gray);
  border-radius: 6px;
  font-family: var(--font-geist-mono);
  font-size: 13px;
  display: grid;
  place-items: center;
  cursor: pointer;
  position: relative;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.atlas-cell:hover { transform: scale(1.15); z-index: 5; box-shadow: 0 4px 14px rgba(28, 25, 23, 0.18); }

/* area colors — the palette repurposed as a categorical scale */
.ac-teal         { background: var(--color-butler-teal);    color: var(--color-white); }
.ac-charcoal     { background: var(--color-charcoal);       color: var(--color-aqua-mist); border-color: var(--color-charcoal); }
.ac-deepteal     { background: var(--color-deep-teal);      color: var(--color-white); }
.ac-graphite     { background: var(--color-deep-graphite);  color: var(--color-aqua-mist); border-color: var(--color-deep-graphite); }
.ac-outlineaqua  { background: var(--color-outline-aqua);   color: var(--color-ink); }
.ac-amidtone     { background: var(--color-aqua-midtone);   color: var(--color-ink); }
.ac-warmgray     { background: var(--color-warm-gray);      color: var(--color-white); border-color: var(--color-warm-gray); }
.ac-mist         { background: var(--color-aqua-mist);      color: var(--color-deep-teal); }
.ac-steel        { background: var(--color-steel);          color: var(--color-charcoal); border-color: var(--color-steel); }
.ac-rule         { background: var(--color-rule-gray);      color: var(--color-ink); }

/* hover tooltip with the idea name */
.atlas-cell::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-charcoal);
  color: var(--color-white);
  font-family: var(--font-geist-mono);
  font-size: 11px;
  line-height: 1.4;
  padding: 6px 10px;
  border-radius: 6px;
  width: max-content;
  max-width: 230px;
  text-align: center;
  white-space: normal;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.12s ease;
  z-index: 6;
}

.atlas-cell:hover::after,
.atlas-cell:focus-visible::after { opacity: 1; }

@media (max-width: 520px) {
  .atlas-cell::after { display: none; }
}

/* ---- Teal conversion card ---- */

.cta {
  border-radius: var(--radius-lg);
  background: var(--color-butler-teal);
  background-image: radial-gradient(rgba(255, 255, 255, 0.16) 1px, transparent 1px);
  background-size: 20px 20px;
  padding: 58px 32px;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.cta .badge { border: none; }

.cta h2 {
  margin: 20px 0 12px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  max-width: 22ch;
}

.cta p {
  color: rgba(255, 255, 255, 0.82);
  max-width: 520px;
  margin: 0 0 28px;
  font-size: 16px;
  line-height: 1.6;
}

.cta .row { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---- Footer ---- */

.site-footer {
  border-top: 1px solid var(--color-rule-gray);
  padding: 48px 0 40px;
  margin-top: 88px;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: space-between;
  align-items: flex-start;
}

.footer-grid .f-brand { max-width: 320px; }
.footer-grid .f-brand p { margin-top: 12px; }

.f-col h5 {
  margin: 0 0 12px;
  font-family: var(--font-geist-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-warm-gray);
}

.f-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.f-col a {
  font-size: 14px;
  color: var(--color-ink);
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 0% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size 0.2s ease, color 0.15s ease;
  padding-bottom: 2px;
}
.f-col a:hover { color: var(--color-deep-teal); background-size: 100% 1px; }

.footer-bottom {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--color-rule-gray);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  font-family: var(--font-geist-mono);
  font-size: 12px;
  color: var(--color-steel);
}

/* ---- Dialog a11y helpers ---- */

body.modal-open { overflow: hidden; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible { outline: 2px solid var(--color-butler-teal); outline-offset: 2px; }