/* ============================================================
   DESIGN SYSTEM MANIFEST · v5
   Identity: "A designer-engineer's terminal-meets-canvas: monospace
   headlines set like compiled output on a cool graphite surface, one
   electric-blue signal color, a faint dot-grid canvas breathing behind
   an abstract node graph, and scroll reveals that feel assembled
   rather than decorated."
   Fingerprint:
     1. JetBrains Mono (weight 400 only) for headlines — reads like
        terminal/code output — never mixed with Inter within a role.
     2. Single electric-blue accent (--portfolio-color-primary) reserved
        exclusively for interactive elements against a strict cool
        monochrome surface stack.
     3. Two distinct card motifs for two distinct identities: Projects
        are code-editor windows (traffic-light dots, tab header — shipped
        software); DaveBuilds entries are glass journal cards (the
        narrative/writing side). Same tokens, different silhouette.
   Fonts:    JetBrains Mono (400) / Inter (400, 500, 600)
   Type:     tokens sourced from portfolio-tokens.css (already locked
             by the project's existing design-token files)
   Status:   Color + type tokens = LOCKED (pre-existing).
             Spacing / radius / shadow / motion tokens below = DRAFT,
             introduced here since the token files didn't define them.
   Changelog:
     v1 — initial system, built on existing color/typography tokens
     v2 — personal-brand restructure (Dave Hennit / DaveBuilds journal
          split from Projects); added glass-card variant + ambient
          gradient-blob treatment, both within the existing v1 palette
     v3 — DaveBuilds became a real multi-page space (davebuilds.html
          landing + one davebuilds-<slug>.html story per finished
          project) instead of a homepage feed section; added the
          long-form story article layout (sticky TOC, code blocks,
          large image placeholders) — still built from the same tokens
     v4 — dark-mode audit: ran a real WCAG 2 contrast check on every
          color pairing used in this file (18 pairs). --portfolio-color-
          on-primary darkened #0B2A5C -> #081C44 (4.37:1 -> 5.21:1 on
          primary; source of truth is portfolio-color-roles-cool-
          monochrome.json, regenerated via convert-tokens-to-css.js).
          outline-variant border contrast (1.5-1.7:1 against surface)
          was flagged but left as-is — decorative/subtle-by-design,
          cards remain distinguishable via bg + shadow. Also added a
          live prefers-color-scheme listener (common.js) and an anti-
          FOUC inline head script (all pages) — unrelated to tokens,
          noted here for the same audit pass.
     v5 — responsive audit: .btn now sets justify-content: center (mobile
          hero CTAs were stretching full-width via .hero-actions but
          leaving their label left-justified inside the frame); both
          .project-grid and .story-grid changed from
          minmax(320px, 1fr) to minmax(min(320px, 100%), 1fr) — the
          fixed 320px minimum could force horizontal overflow below
          ~368px viewport width, the new form can never exceed 100%
          of the available column regardless of screen size.
   ============================================================ */

:root {
  /* Spacing scale (4px grid) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  --space-5xl: 128px;

  /* Radius scale */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  /* Shadows (dark-surface tuned — subtle, layered) */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.24);
  --shadow-md: 0 1px 2px rgba(0,0,0,0.22), 0 4px 10px rgba(0,0,0,0.22);
  --shadow-lg: 0 2px 4px rgba(0,0,0,0.22), 0 10px 20px rgba(0,0,0,0.24), 0 24px 40px rgba(0,0,0,0.20);
  --shadow-glow: 0 0 0 3px rgba(76,141,255,0.22);

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 120ms;
  --dur-base: 200ms;
  --dur-slow: 500ms;

  --container-max: 1200px;

  /* Glass surface (nav already used blur inline; this makes it reusable) */
  --glass-bg: color-mix(in srgb, var(--portfolio-color-surface-container) 55%, transparent);
  --glass-border: color-mix(in srgb, var(--portfolio-color-outline) 30%, transparent);
}

[data-theme="light"] {
  --shadow-sm: 0 1px 2px rgba(15,17,21,0.06);
  --shadow-md: 0 1px 2px rgba(15,17,21,0.05), 0 4px 10px rgba(15,17,21,0.06);
  --shadow-lg: 0 2px 4px rgba(15,17,21,0.05), 0 10px 20px rgba(15,17,21,0.07), 0 24px 40px rgba(15,17,21,0.06);
  --shadow-glow: 0 0 0 3px rgba(47,111,224,0.16);
}

.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
}

.gradient-blob {
  position: absolute; border-radius: 50%; pointer-events: none;
  filter: blur(90px); opacity: 0.28; z-index: 0;
}
.gradient-blob-hero {
  width: 480px; height: 480px; left: -10%; top: 15%;
  background: radial-gradient(circle, var(--portfolio-color-primary), transparent 70%);
}
.gradient-blob-projects {
  width: 420px; height: 420px; right: -8%; top: -6%;
  background: radial-gradient(circle, var(--portfolio-color-tertiary), transparent 70%);
}
.gradient-blob-davebuilds {
  width: 420px; height: 420px; left: -8%; bottom: -10%;
  background: radial-gradient(circle, var(--portfolio-color-primary), transparent 70%);
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--portfolio-color-surface);
  color: var(--portfolio-color-on-surface);
  font-family: var(--portfolio-font-family-sans);
  font-size: var(--portfolio-typography-body-large-font-size);
  line-height: var(--portfolio-typography-body-large-line-height);
  letter-spacing: var(--portfolio-typography-body-large-letter-spacing);
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--dur-base) ease, color var(--dur-base) ease;
}
h1, h2, h3, p, ul { margin: 0; }
ul { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

.skip-link {
  position: absolute; left: 12px; top: -60px;
  background: var(--portfolio-color-primary); color: var(--portfolio-color-on-primary);
  padding: 10px 16px; border-radius: var(--radius-sm); z-index: 200;
  transition: top var(--dur-base) var(--ease-out);
}
.skip-link:focus { top: 12px; }

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

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

.eyebrow {
  font-family: var(--portfolio-font-family-sans);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--portfolio-color-tertiary);
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}
.eyebrow-sep { color: var(--portfolio-color-outline); }

.section-heading {
  font-family: var(--portfolio-font-family-mono);
  font-weight: var(--portfolio-typography-headline-large-font-weight);
  font-size: clamp(1.75rem, 4vw, var(--portfolio-typography-headline-large-font-size));
  line-height: var(--portfolio-typography-headline-large-line-height);
  letter-spacing: -0.01em;
  color: var(--portfolio-color-on-surface);
  margin-bottom: var(--space-lg);
}

.body-text {
  color: var(--portfolio-color-on-surface-variant);
  max-width: 60ch;
  margin-bottom: var(--space-md);
}

.section-header-sub { margin-top: -8px; }

/* ==========================================================================
   Scroll progress + reveal system
   ========================================================================== */
.scroll-progress {
  position: fixed; inset: 0 0 auto 0; height: 3px; z-index: 300;
  background: var(--portfolio-color-primary);
  transform-origin: 0 50%; transform: scaleX(0);
  animation: progress linear both;
  animation-timeline: scroll(root block);
}
@keyframes progress { to { transform: scaleX(1); } }

.scrub-reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
.scrub-reveal.in { opacity: 1; transform: none; }

.enter { opacity: 0; transform: translateY(16px); transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out); }
.enter.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .scroll-progress { animation: none; transform: scaleX(1); }
  .scrub-reveal, .enter { transition: none; opacity: 1; transform: none; }
}

/* ==========================================================================
   Nav
   ========================================================================== */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: color-mix(in srgb, var(--portfolio-color-surface) 72%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--portfolio-color-outline-variant);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav-logo { display: flex; align-items: center; gap: var(--space-sm); font-family: var(--portfolio-font-family-mono); font-size: 0.95rem; }
.nav-links { display: flex; gap: var(--space-md); }
.nav-link {
  position: relative; padding: 8px 4px; font-weight: 500; font-size: 0.92rem;
  color: var(--portfolio-color-on-surface-variant);
  transition: color var(--dur-fast) ease;
}
.nav-link:hover { color: var(--portfolio-color-on-surface); }
.nav-link.active { color: var(--portfolio-color-on-surface); }
.nav-link.active::after {
  content: ""; position: absolute; left: 4px; right: 4px; bottom: 0;
  height: 2px; background: var(--portfolio-color-primary); border-radius: 2px;
}
.nav-actions { display: flex; align-items: center; gap: var(--space-sm); }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--radius-pill);
  color: var(--portfolio-color-on-surface-variant);
  transition: background-color var(--dur-fast) ease, color var(--dur-fast) ease, transform var(--dur-fast) ease;
}
.icon-btn:hover { background: var(--portfolio-color-surface-container-high); color: var(--portfolio-color-on-surface); }
.icon-btn:active { transform: scale(0.94); }

.icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

.nav-menu-btn { display: none; }

.mobile-menu {
  display: none; flex-direction: column;
  background: var(--portfolio-color-surface);
  border-bottom: 1px solid var(--portfolio-color-outline-variant);
}
.mobile-menu a { padding: 14px var(--space-lg); border-top: 1px solid var(--portfolio-color-outline-variant); font-weight: 500; }
.mobile-menu.open { display: flex; }

@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-menu-btn { display: inline-flex; }
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-sm);
  padding: 12px 22px; border-radius: var(--radius-md);
  font-family: var(--portfolio-font-family-sans);
  font-weight: var(--portfolio-typography-label-large-font-weight);
  font-size: var(--portfolio-typography-label-large-font-size);
  letter-spacing: var(--portfolio-typography-label-large-letter-spacing);
  border: 1px solid transparent;
  transition: transform var(--dur-fast) ease, background-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease, border-color var(--dur-fast) ease;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--portfolio-color-primary); color: var(--portfolio-color-on-primary); }
.btn-primary:hover { box-shadow: var(--shadow-glow); }
.btn-ghost { background: transparent; color: var(--portfolio-color-on-surface); border-color: var(--portfolio-color-outline); }
.btn-ghost:hover { background: var(--portfolio-color-surface-container-high); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  overflow: clip; padding-top: 64px;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.dot-grid {
  position: absolute; inset: 0;
  background-image: radial-gradient(var(--portfolio-color-outline-variant) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse 70% 60% at 60% 40%, black 20%, transparent 80%);
  opacity: 0.7;
}
.node-graph {
  position: absolute; top: 50%; right: -8%; transform: translateY(-50%);
  width: min(56vw, 780px); height: auto; opacity: 0.55;
}
.node-lines line { stroke-dasharray: 4 5; }
.node-dots circle { filter: drop-shadow(0 0 6px rgba(76,141,255,0.5)); }

.hero-content { position: relative; z-index: 1; max-width: 760px; }
.hero-heading {
  font-family: var(--portfolio-font-family-mono);
  font-weight: var(--portfolio-typography-display-large-font-weight);
  font-size: clamp(2.6rem, 7vw, var(--portfolio-typography-display-large-font-size));
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-lg);
}
.cursor-blink { color: var(--portfolio-color-primary); animation: blink 1.1s steps(1) infinite; }
.cursor-blink.cursor-done { animation: none; opacity: 1; }
@keyframes blink { 50% { opacity: 0; } }

.hero-roles {
  font-family: var(--portfolio-font-family-mono);
  font-size: 0.95rem;
  color: var(--portfolio-color-tertiary);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-md);
}
.role-sep { color: var(--portfolio-color-outline); }

.hero-sub {
  font-size: var(--portfolio-typography-title-medium-font-size);
  line-height: 1.6;
  color: var(--portfolio-color-on-surface-variant);
  max-width: 54ch;
  margin-bottom: var(--space-xl);
}
.hero-actions { display: flex; gap: var(--space-md); flex-wrap: wrap; }

.hero-aka {
  margin-top: var(--space-xl);
  font-size: 0.85rem;
  color: var(--portfolio-color-on-surface-variant);
}
.hero-aka a { border-bottom: 1px solid var(--portfolio-color-outline-variant); transition: border-color var(--dur-fast) ease, color var(--dur-fast) ease; }
.hero-aka a:hover { color: var(--portfolio-color-on-surface); border-color: var(--portfolio-color-primary); }

.scroll-cue {
  position: absolute; bottom: var(--space-xl); left: 50%; transform: translateX(-50%);
  color: var(--portfolio-color-on-surface-variant);
  animation: bob 2s ease-in-out infinite;
}
@keyframes bob { 0%,100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, 8px); } }
.scroll-cue.hide { opacity: 0; pointer-events: none; transition: opacity var(--dur-base) ease; }

@media (prefers-reduced-motion: reduce) {
  .cursor-blink, .scroll-cue { animation: none; }
}

/* ==========================================================================
   About
   ========================================================================== */
.about { padding-block: var(--space-4xl); border-top: 1px solid var(--portfolio-color-outline-variant); }
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-3xl); align-items: start; }

.stack-list { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-top: var(--space-lg); }
.stack-list li {
  font-family: var(--portfolio-font-family-mono);
  font-size: 0.8rem;
  padding: 6px 14px; border-radius: var(--radius-pill);
  background: var(--portfolio-color-surface-container);
  border: 1px solid var(--portfolio-color-outline-variant);
  color: var(--portfolio-color-on-surface-variant);
}

.terminal-card {
  background: var(--portfolio-color-surface-container-lowest);
  border: 1px solid var(--portfolio-color-outline-variant);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.window-chrome {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  background: var(--portfolio-color-surface-container-high);
  border-bottom: 1px solid var(--portfolio-color-outline-variant);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-red { background: #F2726A; }
.dot-yellow { background: #F2C14E; }
.dot-green { background: #62C370; }
.window-title { margin-left: var(--space-sm); font-family: var(--portfolio-font-family-mono); font-size: 0.78rem; color: var(--portfolio-color-on-surface-variant); }

.terminal-body { padding: var(--space-lg); font-family: var(--portfolio-font-family-mono); font-size: 0.88rem; line-height: 1.9; }
.terminal-body .prompt { color: var(--portfolio-color-primary); margin-right: 8px; }
.terminal-body .out { color: var(--portfolio-color-on-surface-variant); margin-bottom: var(--space-sm); }
.terminal-body .out-accent { color: var(--portfolio-color-tertiary); }

@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
}

/* ==========================================================================
   Projects
   ========================================================================== */
.projects {
  position: relative; overflow: clip;
  padding-block: var(--space-4xl); border-top: 1px solid var(--portfolio-color-outline-variant);
}
.projects .container { position: relative; z-index: 1; }

.project-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr));
  gap: var(--space-lg); margin-top: var(--space-2xl);
}

.project-card {
  position: relative;
  background: var(--portfolio-color-surface-container);
  border: 1px solid var(--portfolio-color-outline-variant);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out), border-color var(--dur-base) ease;
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--portfolio-color-outline);
  box-shadow: var(--shadow-lg);
}
.project-card .window-chrome { justify-content: flex-start; }
.project-card .window-chrome-dots { display: flex; gap: 8px; }
.project-card .window-title { font-family: var(--portfolio-font-family-mono); font-size: 0.72rem; color: var(--portfolio-color-on-surface-variant); }

.project-cover {
  height: 150px;
  background: linear-gradient(135deg, var(--cover-a, #1E4488), var(--cover-b, #4A3B96));
  position: relative; overflow: hidden;
}
.project-cover::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.14) 1px, transparent 1px);
  background-size: 18px 18px;
}
.project-cover img { width: 100%; height: 100%; object-fit: cover; object-position: top; display: block; }
.project-cover:has(img)::after { display: none; }

.project-body { padding: var(--space-lg); }
.project-title {
  font-family: var(--portfolio-font-family-mono);
  font-size: var(--portfolio-typography-headline-small-font-size);
  margin-bottom: var(--space-sm);
}
.project-blurb { color: var(--portfolio-color-on-surface-variant); font-size: 0.92rem; margin-bottom: var(--space-md); }

.project-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: var(--space-md); }
.project-tags span {
  font-size: 0.72rem; font-family: var(--portfolio-font-family-mono);
  padding: 3px 9px; border-radius: var(--radius-pill);
  background: var(--portfolio-color-surface-container-high);
  color: var(--portfolio-color-on-surface-variant);
}

.project-links { display: flex; gap: var(--space-lg); }
.project-links a {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.85rem; font-weight: 500; color: var(--portfolio-color-primary);
  transition: gap var(--dur-fast) ease;
}
.project-links a:hover { gap: 9px; }
.project-links a.disabled { color: var(--portfolio-color-on-surface-variant); pointer-events: none; }

.story-link {
  display: flex; align-items: center; gap: 6px;
  margin-top: var(--space-md); padding-top: var(--space-md);
  border-top: 1px solid var(--portfolio-color-outline-variant);
  font-size: 0.85rem; font-weight: 500; color: var(--portfolio-color-tertiary);
}
.story-arrow { display: inline-block; transition: transform var(--dur-fast) ease; }
.story-link:hover .story-arrow { transform: translateX(4px); }

.inline-link {
  color: var(--portfolio-color-primary);
  border-bottom: 1px solid color-mix(in srgb, var(--portfolio-color-primary) 40%, transparent);
  transition: border-color var(--dur-fast) ease;
}
.inline-link:hover { border-color: var(--portfolio-color-primary); }

/* ==========================================================================
   Page intro (used by davebuilds.html — a page header, not a full hero)
   ========================================================================== */
.page-intro {
  position: relative; overflow: clip;
  padding-block: 140px var(--space-4xl);
  border-bottom: 1px solid var(--portfolio-color-outline-variant);
}
.page-intro-content { position: relative; z-index: 1; max-width: 760px; }
.page-intro-heading {
  font-family: var(--portfolio-font-family-mono);
  font-weight: var(--portfolio-typography-display-medium-font-weight);
  font-size: clamp(2rem, 5vw, var(--portfolio-typography-display-medium-font-size));
  line-height: 1.1; letter-spacing: -0.01em;
  margin-bottom: var(--space-lg);
}
.page-intro-sub {
  color: var(--portfolio-color-on-surface-variant);
  font-size: var(--portfolio-typography-title-medium-font-size);
  line-height: 1.7; max-width: 62ch;
}

/* ==========================================================================
   DaveBuilds landing — story cards
   ========================================================================== */
.stories { padding-block: var(--space-4xl); }

.story-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr));
  gap: var(--space-lg);
}

.story-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);
}
.story-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.story-card-thumb {
  height: 160px;
  background: linear-gradient(135deg, var(--cover-a, #1E4488), var(--cover-b, #4A3B96));
  position: relative;
}
.story-card-thumb::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.14) 1px, transparent 1px);
  background-size: 18px 18px;
}
.story-card-thumb img { width: 100%; height: 100%; object-fit: cover; object-position: top; display: block; }
.story-card-thumb:has(img)::after { display: none; }

.story-card-body { padding: var(--space-lg); }
.story-card-title {
  font-family: var(--portfolio-font-family-mono);
  font-size: var(--portfolio-typography-headline-small-font-size);
  margin-bottom: var(--space-sm);
}
.story-card-desc { color: var(--portfolio-color-on-surface-variant); font-size: 0.92rem; margin-bottom: var(--space-md); }

.story-card-meta {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.78rem; color: var(--portfolio-color-on-surface-variant);
  margin: var(--space-md) 0;
}
.meta-sep { color: var(--portfolio-color-outline); }

.story-card-cta {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.85rem; font-weight: 500; color: var(--portfolio-color-primary);
  padding-top: var(--space-md); margin-top: var(--space-sm);
  border-top: 1px solid var(--portfolio-color-outline-variant);
  width: 100%;
}
.story-card-cta:hover .story-arrow { transform: translateX(4px); }

/* ==========================================================================
   Story article page (davebuilds-<slug>.html)
   ========================================================================== */
.story-header {
  padding-block: 140px var(--space-2xl);
  max-width: 800px;
}
.story-title {
  font-family: var(--portfolio-font-family-mono);
  font-weight: var(--portfolio-typography-display-small-font-weight);
  font-size: clamp(1.9rem, 5vw, var(--portfolio-typography-display-small-font-size));
  line-height: 1.15; letter-spacing: -0.01em;
  margin-bottom: var(--space-md);
}
.story-dek {
  color: var(--portfolio-color-on-surface-variant);
  font-size: var(--portfolio-typography-title-medium-font-size);
  line-height: 1.6; max-width: 62ch;
  margin-bottom: var(--space-lg);
}
.story-meta {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.85rem; color: var(--portfolio-color-on-surface-variant);
}

.story-cover {
  max-width: var(--container-max);
  margin: 0 auto var(--space-4xl);
  aspect-ratio: 21 / 9;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg,
    var(--portfolio-color-surface-container-high),
    var(--portfolio-color-surface-container-low));
  border: 1px solid var(--portfolio-color-outline-variant);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  margin-inline: var(--space-lg);
}
@media (min-width: 1232px) { .story-cover { margin-inline: auto; } }
.story-cover img { width: 100%; height: 100%; object-fit: cover; object-position: top; display: block; }
.story-cover-label {
  font-family: var(--portfolio-font-family-mono); font-size: 0.85rem;
  color: var(--portfolio-color-on-surface-variant);
}

.story-layout {
  display: grid; grid-template-columns: 220px 1fr;
  gap: var(--space-3xl);
  padding-bottom: var(--space-4xl);
}

.story-toc { position: sticky; top: 96px; align-self: start; }
.toc-label {
  font-family: var(--portfolio-font-family-mono); font-size: 0.72rem;
  letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--portfolio-color-on-surface-variant);
  margin-bottom: var(--space-sm);
}
.story-toc ul { display: flex; flex-direction: column; gap: 2px; }
.story-toc a {
  display: block; padding: 6px 10px; border-radius: var(--radius-sm);
  font-size: 0.85rem; color: var(--portfolio-color-on-surface-variant);
  border-left: 2px solid transparent;
  transition: color var(--dur-fast) ease, border-color var(--dur-fast) ease;
}
.story-toc a:hover { color: var(--portfolio-color-on-surface); }
.story-toc a.active {
  color: var(--portfolio-color-primary);
  border-left-color: var(--portfolio-color-primary);
  background: color-mix(in srgb, var(--portfolio-color-primary) 8%, transparent);
}
.toc-toggle {
  display: none; align-items: center; gap: 8px;
  width: 100%; padding: 10px 14px; margin-bottom: var(--space-md);
  border: 1px solid var(--portfolio-color-outline-variant);
  border-radius: var(--radius-md);
  font-weight: 500; font-size: 0.9rem;
}
.toc-toggle svg { transition: transform var(--dur-fast) ease; margin-left: auto; }
.story-toc.open .toc-toggle svg { transform: rotate(180deg); }

.story-content { max-width: 70ch; }
.story-section { margin-bottom: var(--space-3xl); scroll-margin-top: 96px; }
.story-section h2 {
  font-family: var(--portfolio-font-family-mono);
  font-size: var(--portfolio-typography-headline-small-font-size);
  margin-bottom: var(--space-md);
}
.story-section p {
  color: var(--portfolio-color-on-surface-variant);
  line-height: 1.8; margin-bottom: var(--space-md);
}
.story-section p:last-child { margin-bottom: 0; }
.story-section code {
  font-family: var(--portfolio-font-family-mono); font-size: 0.9em;
  background: var(--portfolio-color-surface-container-high);
  padding: 2px 6px; border-radius: 4px;
  color: var(--portfolio-color-on-surface);
}

.story-image {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  background: var(--portfolio-color-surface-container);
  border: 1px solid var(--portfolio-color-outline-variant);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  margin: var(--space-lg) 0;
}
.story-image img { width: 100%; height: 100%; object-fit: cover; object-position: top; display: block; }
.story-image-label {
  font-family: var(--portfolio-font-family-mono); font-size: 0.8rem;
  color: var(--portfolio-color-on-surface-variant);
}

.code-block {
  border-radius: var(--radius-lg);
  overflow: hidden; margin: var(--space-lg) 0;
  background: var(--portfolio-color-surface-container-lowest);
  border: 1px solid var(--portfolio-color-outline-variant);
}
.code-block-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  background: var(--portfolio-color-surface-container-high);
  border-bottom: 1px solid var(--portfolio-color-outline-variant);
  font-family: var(--portfolio-font-family-mono); font-size: 0.78rem;
  color: var(--portfolio-color-on-surface-variant);
}
.copy-btn {
  font-size: 0.75rem; font-weight: 500; color: var(--portfolio-color-primary);
  padding: 3px 10px; border-radius: var(--radius-pill);
  border: 1px solid color-mix(in srgb, var(--portfolio-color-primary) 40%, transparent);
  transition: background-color var(--dur-fast) ease;
}
.copy-btn:hover { background: color-mix(in srgb, var(--portfolio-color-primary) 12%, transparent); }
.code-block pre {
  margin: 0; padding: var(--space-lg); overflow-x: auto;
  font-family: var(--portfolio-font-family-mono); font-size: 0.85rem; line-height: 1.7;
  color: var(--portfolio-color-on-surface-variant);
}

.story-tech-tags { margin-bottom: 0; }
.story-links { display: flex; flex-wrap: wrap; gap: var(--space-md); }

@media (max-width: 960px) {
  .story-layout { grid-template-columns: 1fr; }
  .story-toc { position: static; }
  .toc-toggle { display: flex; }
  .story-toc ul { display: none; flex-direction: column; gap: 2px; }
  .story-toc.open ul { display: flex; }
}

/* ==========================================================================
   Contact
   ========================================================================== */
.contact { padding-block: var(--space-4xl); border-top: 1px solid var(--portfolio-color-outline-variant); text-align: center; }
.contact-inner { max-width: 640px; margin-inline: auto; }
.contact-heading { margin-inline: auto; }
.contact-sub { margin-inline: auto; }

.contact-email {
  display: inline-flex; align-items: center; gap: var(--space-sm);
  font-family: var(--portfolio-font-family-mono);
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  color: var(--portfolio-color-on-surface);
  padding: 14px 26px; margin-top: var(--space-lg);
  border: 1px solid var(--portfolio-color-outline);
  border-radius: var(--radius-pill);
  transition: transform var(--dur-fast) ease, border-color var(--dur-fast) ease, color var(--dur-fast) ease;
}
.contact-email:hover { border-color: var(--portfolio-color-primary); color: var(--portfolio-color-primary); }

.social-row { display: flex; justify-content: center; gap: var(--space-sm); margin-top: var(--space-2xl); }

/* ==========================================================================
   Footer
   ========================================================================== */
.footer { padding-block: var(--space-xl); border-top: 1px solid var(--portfolio-color-outline-variant); }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-end; flex-wrap: wrap; gap: var(--space-lg); }
.footer-name { font-family: var(--portfolio-font-family-mono); font-size: 1rem; color: var(--portfolio-color-on-surface); margin-bottom: 2px; }
.footer-legal { font-size: 0.82rem; color: var(--portfolio-color-on-surface-variant); margin-bottom: 6px; }
.footer-tagline { font-size: 0.82rem; color: var(--portfolio-color-on-surface-variant); }
.footer-meta { text-align: right; }
.footer-meta p { color: var(--portfolio-color-on-surface-variant); font-size: 0.85rem; margin-bottom: 6px; }
.footer-top { font-size: 0.85rem; color: var(--portfolio-color-on-surface-variant); transition: color var(--dur-fast) ease; }
.footer-top:hover { color: var(--portfolio-color-on-surface); }

@media (max-width: 500px) {
  .footer-inner { flex-direction: column; align-items: center; text-align: center; }
  .footer-meta { text-align: center; }
}

@media (max-width: 600px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .node-graph { opacity: 0.3; }
}