/* =========================================================
   DEV_ARCHITECT — Technical Precision design system
   Hand-authored CSS (no build step). Tokens mirror DESIGN.md.
   ========================================================= */

/* ---------- Tokens ---------- */
:root {
  /* Surfaces */
  --color-background: #131313;
  --color-surface: #131313;
  --color-surface-dim: #131313;
  --color-surface-bright: #393939;
  --color-surface-container-lowest: #0e0e0e;
  --color-surface-container-low: #1c1b1b;
  --color-surface-container: #20201f;
  --color-surface-container-high: #2a2a2a;
  --color-surface-container-highest: #353535;
  --color-surface-variant: #353535;

  /* Text / content */
  --color-on-surface: #e5e2e1;
  --color-on-surface-variant: #b9ccb2;
  --color-inverse-surface: #e5e2e1;
  --color-inverse-on-surface: #313030;
  --color-outline: #84967e;
  --color-outline-variant: #3b4b37;
  --color-surface-tint: #00e639;

  /* Primary (Terminal Green) */
  --color-primary: #ebffe2;
  --color-on-primary: #003907;
  --color-primary-container: #00ff41;
  --color-on-primary-container: #007117;
  --color-inverse-primary: #006e16;
  --color-primary-fixed: #72ff70;
  --color-primary-fixed-dim: #00e639;

  /* Secondary */
  --color-secondary: #c9c6c5;
  --color-on-secondary: #313030;
  --color-secondary-container: #4a4949;
  --color-on-secondary-container: #bab8b7;
  --color-secondary-fixed: #e5e2e1;
  --color-secondary-fixed-dim: #c9c6c5;

  /* Tertiary */
  --color-tertiary: #f9f9f9;
  --color-on-tertiary: #2f3131;
  --color-tertiary-container: #dcdddd;
  --color-on-tertiary-container: #5f6161;

  /* Error */
  --color-error: #ffb4ab;
  --color-on-error: #690005;
  --color-error-container: #93000a;

  /* Terminal chrome dots */
  --dot-red: #ff5f56;
  --dot-yellow: #ffbd2e;
  --dot-green: #27c93f;
  --grid-line: #333333;

  /* Spacing */
  --space-grid-margin: 40px;
  --space-section: 120px;
  --space-element-gap: 24px;

  /* Typography */
  --font-headline: "Hanken Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-code: "JetBrains Mono", ui-monospace, monospace;

  --max-width: 1440px;
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-background);
  color: var(--color-on-surface);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  overflow-x: hidden;
}
body.technical-grid {
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: top center;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  cursor: pointer;
}
h1, h2, h3, h4, p, ul, pre {
  margin: 0;
}
ul {
  list-style: none;
  padding: 0;
}
:focus-visible {
  outline: 2px solid var(--color-primary-container);
  outline-offset: 2px;
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-grid-margin);
}
.main {
  flex: 1 1 auto;
  width: 100%;
  position: relative;
  z-index: 10;
}
.section-rule {
  border-bottom: 1px solid var(--color-outline-variant);
}

/* ---------- Typography utilities ---------- */
.t-display {
  font-family: var(--font-headline);
  font-size: 80px;
  line-height: 1;
  font-weight: 800;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}
.t-headline {
  font-family: var(--font-headline);
  font-size: 48px;
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.t-headline-sm {
  font-family: var(--font-headline);
  font-size: 32px;
  line-height: 1.2;
  font-weight: 700;
}
.t-body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0.01em;
}
.t-code {
  font-family: var(--font-code);
  font-size: 14px;
  line-height: 1.5;
}
.t-label {
  font-family: var(--font-code);
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.1em;
  font-weight: 500;
  text-transform: uppercase;
}
.t-accent {
  color: var(--color-primary-container);
}
.t-muted {
  color: var(--color-secondary);
}
.uppercase {
  text-transform: uppercase;
}
.tracking-tight {
  letter-spacing: -0.02em;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-outline-variant);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-element-gap);
  padding-block: 16px;
}
.brand {
  font-family: var(--font-headline);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-on-surface);
  white-space: nowrap;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary-fixed-dim);
}
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 0;
  color: var(--color-primary-fixed-dim);
  transition: background-color 0.2s ease, color 0.2s ease;
}
.icon-btn:hover {
  background-color: var(--color-surface-container-highest);
}
.material-symbols-outlined {
  font-family: "Material Symbols Outlined";
  font-weight: normal;
  font-style: normal;
  line-height: 1;
  letter-spacing: normal;
  font-size: 24px;
  display: inline-block;
  white-space: nowrap;
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
}

/* Desktop nav list */
.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-element-gap);
}
.nav-link {
  font-family: var(--font-code);
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.1em;
  font-weight: 500;
  text-transform: uppercase;
  color: var(--color-secondary);
  padding: 8px 10px;
  display: block;
  transition: color 0.2s ease, background-color 0.2s ease;
}
.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-surface-container-high);
}
.nav-link.is-active {
  color: var(--color-primary-fixed-dim);
  border-bottom: 2px solid var(--color-primary-fixed-dim);
  padding-bottom: 6px;
}

/* Hamburger (mobile only) */
.nav-toggle {
  display: none;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-code);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 16px 32px;
  border: 1px solid transparent;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  min-height: 44px;
}
.btn .material-symbols-outlined {
  font-size: 18px;
}
.btn-primary {
  background-color: var(--color-on-surface);
  color: var(--color-surface);
}
.btn-primary:hover {
  background-color: var(--color-primary-container);
  color: var(--color-surface);
}
.btn-ghost {
  background-color: transparent;
  border-color: var(--color-on-surface);
  color: var(--color-on-surface);
}
.btn-ghost:hover {
  border-color: var(--color-primary-container);
  color: var(--color-primary-container);
}
.btn-block {
  width: 100%;
}

/* ---------- Section heading ---------- */
.section-head {
  display: flex;
  align-items: center;
  gap: var(--space-element-gap);
  margin-bottom: var(--space-element-gap);
}
.section-head h2 {
  font-family: var(--font-headline);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--color-on-surface);
  flex: none;
}
.section-head .rule {
  flex: 1;
  height: 1px;
  background-color: var(--color-outline-variant);
}

/* ---------- Hero ---------- */
.hero {
  padding-block: var(--space-section);
  min-height: clamp(480px, 78vh, 820px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}
.scan-line {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: rgba(0, 255, 65, 0.5);
  opacity: 0;
  animation: scan 4s linear infinite;
  pointer-events: none;
}
@keyframes scan {
  0% { top: 0; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-element-gap);
  position: relative;
  z-index: 1;
}
.hero-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-secondary);
  margin-bottom: 8px;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary-container);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero-title {
  font-family: var(--font-headline);
  font-size: clamp(40px, 9vw, 80px);
  line-height: 1;
  font-weight: 800;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  color: var(--color-on-surface);
  word-break: break-word;
}
.hero-desc {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-on-surface);
  max-width: 42rem;
  border-left: 3px solid var(--color-primary-container);
  padding: 8px 0 8px 24px;
  margin-top: 8px;
}
.hero-cta {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}
.hero-code {
  display: none;
  align-items: flex-end;
  justify-content: flex-end;
  opacity: 0.2;
  transition: opacity 0.5s ease;
  min-width: 0;
}
.hero-code:hover {
  opacity: 1;
}
.hero-code pre {
  font-family: var(--font-code);
  font-size: 14px;
  color: var(--color-primary-fixed-dim);
  text-align: right;
  white-space: pre;
  user-select: none;
  overflow: hidden;
}

/* ---------- Bento (Directory Index) ---------- */
.bento {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  padding: 1px;
  background-color: var(--color-outline-variant);
}
.bento > * {
  background-color: var(--color-surface-container-lowest);
  min-width: 0;
}
.feature-block {
  position: relative;
  overflow: hidden;
  min-height: 340px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--color-on-surface);
  isolation: isolate;
}
.feature-block .scan-fill {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 255, 65, 0.05);
  transform: translateY(-100%);
  transition: transform 0.5s ease-in-out;
  z-index: -1;
}
.feature-block:hover .scan-fill {
  transform: translateY(0);
}
.feature-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  position: relative;
  z-index: 1;
}
.feature-top .tag {
  color: var(--color-secondary);
}
.feature-top .material-symbols-outlined {
  font-size: 32px;
  color: var(--color-on-surface);
  transition: color 0.2s ease;
}
.feature-block:hover .feature-top .material-symbols-outlined,
.feature-block:hover .feature-title {
  color: var(--color-primary-container);
}
.feature-body {
  position: relative;
  z-index: 1;
}
.feature-title {
  font-family: var(--font-headline);
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--color-on-surface);
  transition: color 0.2s ease;
}
.feature-body p {
  color: var(--color-secondary);
  margin-top: 16px;
  max-width: 32rem;
}
.glitch-hover:hover {
  animation: glitch-skew 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94) infinite;
  color: var(--color-primary-container);
}
@keyframes glitch-skew {
  0% { transform: skew(0deg); }
  20% { transform: skew(-5deg); }
  40% { transform: skew(5deg); }
  60% { transform: skew(-2deg); }
  80% { transform: skew(2deg); }
  100% { transform: skew(0deg); }
}

/* Skill bars */
.skill-block {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  padding: 32px;
}
.skill-head {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-secondary);
}
.skill-head .material-symbols-outlined {
  font-size: 16px;
}
.skill-value {
  color: var(--color-on-surface);
}
.skill-track {
  height: 4px;
  width: 100%;
  background-color: var(--color-surface-container-high);
}
.skill-fill {
  height: 100%;
  background-color: var(--color-primary-container);
}

/* ---------- Capabilities grid ---------- */
.cap-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  padding: 1px;
  background-color: var(--color-outline-variant);
}
.cap-card {
  background-color: var(--color-surface-container-lowest);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background-color 0.2s ease;
}
.cap-card:hover {
  background-color: var(--color-surface-container);
}
.cap-head {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-secondary);
}
.cap-head .material-symbols-outlined {
  font-size: 18px;
  color: var(--color-primary-fixed-dim);
}
.cap-title {
  font-family: var(--font-headline);
  font-size: 20px;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-on-surface);
}
.cap-card p {
  color: var(--color-secondary);
}

/* ---------- Selected Work ---------- */
.work-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  padding: 1px;
  background-color: var(--color-outline-variant);
}
.work-card {
  background-color: var(--color-surface-container-lowest);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: background-color 0.2s ease;
}
.work-card:hover {
  background-color: var(--color-surface-container);
}
.work-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.work-top .tag {
  color: var(--color-secondary);
}
.work-top .material-symbols-outlined {
  font-size: 28px;
  color: var(--color-on-surface);
  transition: color 0.2s ease;
}
.work-card:hover .work-top .material-symbols-outlined {
  color: var(--color-primary-container);
}
.work-title {
  font-family: var(--font-headline);
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-on-surface);
}
.work-card p {
  color: var(--color-secondary);
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}
.tag-list li {
  font-family: var(--font-code);
  font-size: 11px;
  letter-spacing: 0.08em;
  font-weight: 500;
  text-transform: uppercase;
  color: var(--color-primary-fixed-dim);
  border: 1px solid var(--color-outline-variant);
  padding: 4px 8px;
  white-space: nowrap;
}

/* ---------- Markdown content (profile.md) ---------- */
.md-content {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-on-surface);
}
.md-content > * + * {
  margin-top: 1.25em;
}
.md-content h2 {
  font-family: var(--font-headline);
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-on-surface);
}
.md-content h3 {
  font-family: var(--font-code);
  font-size: 13px;
  letter-spacing: 0.12em;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-primary-container);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-outline-variant);
  margin-top: 2.25em;
}
.md-content p {
  color: var(--color-on-surface);
}
.md-content strong {
  color: var(--color-primary-container);
  font-weight: 700;
}
.md-content ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.md-content li {
  position: relative;
  padding-left: 22px;
  color: var(--color-on-surface);
}
.md-content li::before {
  content: "▸";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-primary-container);
  font-family: var(--font-code);
}
.md-content a {
  color: var(--color-primary-container);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-outline-variant);
  transition: text-decoration-color 0.2s ease;
}
.md-content a:hover {
  text-decoration-color: var(--color-primary-container);
}
.md-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.md-content thead th {
  font-family: var(--font-code);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--color-primary-container);
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-outline-variant);
  white-space: nowrap;
}
.md-content tbody td {
  padding: 16px;
  border-bottom: 1px solid var(--color-outline-variant);
  color: var(--color-on-surface);
  vertical-align: top;
}
.md-content tbody tr:last-child td {
  border-bottom: 0;
}
.md-content hr {
  border: 0;
  border-top: 1px solid var(--color-outline-variant);
  margin-top: 2em;
  margin-bottom: 0;
}
.md-content code {
  font-family: var(--font-code);
  font-size: 0.9em;
  background-color: var(--color-surface-container-high);
  padding: 2px 6px;
  color: var(--color-primary-fixed-dim);
}

/* ---------- Stack terminal card ---------- */
.terminal {
  border: 1px solid var(--color-outline-variant);
  background-color: var(--color-surface-container-lowest);
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--color-outline-variant);
  background-color: var(--color-surface-container-high);
}
.terminal-dots {
  display: flex;
  gap: 8px;
}
.terminal-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}
.terminal-body {
  padding: 32px;
}
.terminal-prompt {
  color: var(--color-secondary);
  margin-bottom: 32px;
}
.stack-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 32px;
}
.stack-group h4 {
  font-family: var(--font-code);
  font-size: 12px;
  letter-spacing: 0.1em;
  font-weight: 500;
  text-transform: uppercase;
  color: var(--color-primary-container);
  padding-bottom: 8px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--color-outline-variant);
}
.stack-group ul {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.stack-group li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-on-surface);
  transition: color 0.2s ease;
}
.stack-group li:hover .stack-name {
  color: var(--color-primary-container);
}
.stack-group li .stack-ver {
  color: var(--color-secondary);
  opacity: 0;
  transition: opacity 0.2s ease;
}
.stack-group li:hover .stack-ver {
  opacity: 1;
}
.terminal-cursor {
  display: flex;
  align-items: center;
  color: var(--color-primary-container);
  margin-top: 32px;
}
.blink {
  display: inline-block;
  width: 8px;
  height: 1em;
  margin-left: 8px;
  background-color: var(--color-primary-container);
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ---------- Footer ---------- */
.site-footer {
  width: 100%;
  border-top: 1px solid var(--color-outline-variant);
  background-color: var(--color-surface-container-lowest);
  margin-top: auto;
  position: relative;
  z-index: 1;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-element-gap);
  padding-block: 32px;
}
.footer-copy {
  font-family: var(--font-code);
  font-size: 14px;
  color: var(--color-primary-fixed-dim);
}
/* ---------- Contact page ---------- */
.contact-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-block: var(--space-section);
  position: relative;
}
.contact-card {
  width: 100%;
  max-width: 42rem;
  background-color: var(--color-surface-container-lowest);
  border: 1px solid var(--color-outline-variant);
  padding: 32px;
  position: relative;
  overflow: hidden;
}
.contact-card-bar {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  border-bottom: 1px solid var(--color-outline-variant);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  background-color: var(--color-surface-container-low);
}
.contact-card-inner {
  margin-top: 40px;
}
.contact-title {
  font-family: var(--font-headline);
  font-size: clamp(40px, 8vw, 80px);
  line-height: 1;
  font-weight: 800;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  color: var(--color-on-surface);
  margin-bottom: 32px;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
}
.field label {
  font-family: var(--font-code);
  font-size: 14px;
  color: var(--color-on-tertiary-container);
}
.terminal-input {
  width: 100%;
  background-color: transparent;
  border: 0;
  border-bottom: 1px solid var(--color-secondary);
  color: var(--color-on-surface);
  font-family: var(--font-code);
  font-size: 14px;
  padding: 8px 0;
  border-radius: 0;
  outline: none;
}
.terminal-input::placeholder {
  color: var(--color-on-tertiary-container);
  opacity: 0.7;
}
.terminal-input:focus {
  border-bottom-color: var(--color-primary-container);
  box-shadow: 0 1px 0 0 var(--color-primary-container);
}
.field textarea {
  border: 1px solid var(--color-secondary);
  padding: 16px;
  resize: none;
}
.field textarea:focus {
  border-color: var(--color-primary-container);
}
.cursor {
  display: inline-block;
  width: 8px;
  height: 1em;
  background-color: var(--color-primary-container);
  margin-left: 4px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}
.cursor.is-hidden {
  display: none;
}

/* Social link cards */
.social-grid {
  width: 100%;
  max-width: 42rem;
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: var(--space-element-gap);
}
.social-card {
  border: 1px solid var(--color-outline-variant);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background-color 0.2s ease;
}
.social-card:hover {
  background-color: var(--color-surface-container-high);
}
.social-card .social-tag {
  font-family: var(--font-code);
  font-size: 12px;
  letter-spacing: 0.1em;
  font-weight: 500;
  text-transform: uppercase;
  color: var(--color-secondary);
  transition: color 0.2s ease;
}
.social-card:hover .social-tag {
  color: var(--color-primary-container);
}
.social-card .social-name {
  font-family: var(--font-code);
  font-size: 14px;
  color: var(--color-on-surface);
}

/* ---------- Responsive ---------- */

/* Tablet (<= 1024px) */
@media (max-width: 1024px) {
  :root {
    --space-section: 80px;
  }
  .stack-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* Tablet wide layout for bento */
@media (min-width: 640px) {
  .bento {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .feature-block {
    grid-column: 1 / -1;
  }
  .skill-block:last-child {
    grid-column: 1 / -1;
  }
  .hero-cta {
    flex-direction: row;
    flex-wrap: wrap;
  }
}

/* Desktop bento (>= 1024px) */
@media (min-width: 1024px) {
  .bento {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
  .feature-block {
    grid-column: span 12;
  }
  .skill-block {
    grid-column: span 4;
  }
  .skill-block:last-child {
    grid-column: span 4;
  }
  .stack-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* Hero decorative code: show only on very wide screens */
@media (min-width: 1280px) {
  .hero-grid {
    grid-template-columns: 9fr 3fr;
  }
  .hero-code {
    display: flex;
  }
}

/* Social cards: 3-up on tablet+ */
@media (min-width: 768px) {
  .social-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .contact-card {
    padding: 48px;
  }
  .contact-card-inner {
    margin-top: 48px;
  }
  .footer-inner {
    flex-direction: row;
  }
}

/* Mobile (< 768px): collapse nav into hamburger */
@media (max-width: 767px) {
  :root {
    --space-section: 48px;
    --space-grid-margin: 20px;
    --space-element-gap: 16px;
  }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 0;
    color: var(--color-secondary);
  }
  .nav-toggle:hover {
    color: var(--color-primary);
  }
  /* Desktop list hidden, replaced by slide-down panel */
  .nav-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-outline-variant);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .nav-list.is-open {
    max-height: 80vh;
    overflow-y: auto;
  }
  .nav-list li {
    width: 100%;
    border-top: 1px solid var(--color-outline-variant);
  }
  .nav-list .nav-link {
    padding: 18px var(--space-grid-margin);
    font-size: 14px;
  }
  .nav-link.is-active {
    border-bottom: 0;
    border-left: 2px solid var(--color-primary-fixed-dim);
    padding-bottom: 18px;
  }
  .hero-code {
    display: none;
  }
  .stack-grid {
    grid-template-columns: 1fr;
  }
  .contact-card {
    padding: 24px;
  }
  .contact-card-inner {
    margin-top: 40px;
  }
}

/* Capabilities + work grids responsive */
@media (min-width: 640px) {
  .cap-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1024px) {
  .cap-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .work-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Markdown table: scroll on small screens */
@media (max-width: 767px) {
  .md-content table,
  .md-content thead,
  .md-content tbody,
  .md-content th,
  .md-content td,
  .md-content tr {
    display: block;
  }
  .md-content thead tr {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
  }
  .md-content tbody tr {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-outline-variant);
  }
  .md-content tbody tr:last-child {
    border-bottom: 0;
  }
  .md-content td {
    border: 0;
    padding: 4px 0;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}