/* =========================================================
   ble.audit — Wiktor Knapik final-year project showcase
   Dark-first, cyber/terminal aesthetic with teal accent.
   ========================================================= */

:root {
  /* Type scale (fluid) */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.25rem, 1.2rem + 3.2vw, 4rem);
  --text-hero: clamp(2.5rem, 1rem + 5vw, 5.5rem);

  /* Spacing (4px base) */
  --space-1: 0.25rem;  --space-2: 0.5rem;   --space-3: 0.75rem;
  --space-4: 1rem;     --space-5: 1.25rem;  --space-6: 1.5rem;
  --space-8: 2rem;     --space-10: 2.5rem;  --space-12: 3rem;
  --space-16: 4rem;    --space-20: 5rem;    --space-24: 6rem;
  --space-32: 8rem;

  /* Radius + transitions */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 1040px;
  --content-wide: 1240px;

  /* Fonts */
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;
}

/* DARK (default) */
:root,
[data-theme='dark'] {
  --color-bg: #0a0d0c;
  --color-surface: #101413;
  --color-surface-2: #141918;
  --color-surface-offset: #171c1b;
  --color-border: #22302d;
  --color-border-strong: #2f4440;
  --color-divider: #1c2422;

  --color-text: #dfe7e5;
  --color-text-muted: #8a9b97;
  --color-text-faint: #5c6c69;
  --color-text-inverse: #0a0d0c;

  --color-primary: #4fd1c5;        /* teal */
  --color-primary-hover: #6fe3d8;
  --color-primary-highlight: #13302d;
  --color-accent-2: #a3e635;       /* lime, tiny accent */

  --color-warn: #f59e0b;
  --color-danger: #ef4444;
  --color-ok: #34d399;

  --grid-color: rgba(79, 209, 197, 0.055);
  --glow-color: rgba(79, 209, 197, 0.18);
  --term-bg: #070a09;
  --term-border: #1c2624;

  --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.55);
}

/* LIGHT */
[data-theme='light'] {
  --color-bg: #f7f8f7;
  --color-surface: #ffffff;
  --color-surface-2: #f1f4f3;
  --color-surface-offset: #e9efed;
  --color-border: #d6dedc;
  --color-border-strong: #b8c5c2;
  --color-divider: #e1e7e5;

  --color-text: #0f1715;
  --color-text-muted: #56655f;
  --color-text-faint: #8d9b96;
  --color-text-inverse: #f7f8f7;

  --color-primary: #0f766e;
  --color-primary-hover: #0d5f58;
  --color-primary-highlight: #d5ebe8;

  --grid-color: rgba(15, 118, 110, 0.05);
  --glow-color: rgba(15, 118, 110, 0.12);
  --term-bg: #0a0f0e;
  --term-border: #202a28;

  --shadow-md: 0 6px 24px rgba(15, 23, 21, 0.08);
  --shadow-lg: 0 20px 60px rgba(15, 23, 21, 0.12);
}

/* ========== Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}
body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}
img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.1;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
p { text-wrap: pretty; }
.mono { font-family: var(--font-mono); font-size: 0.95em; letter-spacing: -0.01em; }
.small { font-size: var(--text-xs); color: var(--color-text-muted); }

::selection { background: var(--color-primary); color: var(--color-text-inverse); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

button { cursor: pointer; background: none; border: none; color: inherit; font: inherit; }

/* ========== Background layers ========== */
.bg-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at 50% 30%, black 40%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 40%, transparent 85%);
}
.bg-glow {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(600px 400px at 85% -5%, var(--glow-color), transparent 70%),
    radial-gradient(500px 400px at 5% 40%, var(--glow-color), transparent 70%);
}

/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-4) clamp(var(--space-4), 4vw, var(--space-10));
  background: color-mix(in oklab, var(--color-bg) 78%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
}
.brand {
  display: inline-flex; align-items: center; gap: var(--space-3);
  color: var(--color-text);
}
.brand svg { color: var(--color-primary); flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-mark {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: var(--text-sm);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 3px;
}
.site-nav {
  margin-left: auto;
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
}
.site-nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-1) 0;
  position: relative;
}
.site-nav a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -4px;
  height: 1px; background: var(--color-primary); transform: scaleX(0);
  transform-origin: left; transition: transform var(--transition-interactive);
}
.site-nav a:hover { color: var(--color-text); }
.site-nav a:hover::after { transform: scaleX(1); }
.site-nav a.is-active { color: var(--color-primary); }
.site-nav a.is-active::after { transform: scaleX(1); }

.theme-toggle {
  width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full, 999px);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), border-color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover { color: var(--color-primary); border-color: var(--color-primary); }

@media (max-width: 880px) {
  .site-nav { display: none; }
}

/* ========== Hero ========== */
.hero {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: clamp(var(--space-16), 10vw, var(--space-32)) clamp(var(--space-4), 4vw, var(--space-10)) var(--space-20);
}
.hero-meta {
  display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center;
  margin-bottom: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-muted);
}
.status {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: color-mix(in oklab, var(--color-primary) 12%, transparent);
  border: 1px solid color-mix(in oklab, var(--color-primary) 40%, transparent);
  border-radius: 999px;
  color: var(--color-primary);
}
.status .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 0 0 currentColor;
  animation: pulse 2s ease-out infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in oklab, var(--color-primary) 60%, transparent); }
  70% { box-shadow: 0 0 0 10px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.03;
  max-width: 18ch;
}
.hero-title .line { display: block; }
.hero-title .accent {
  color: var(--color-primary);
  font-style: italic;
  font-weight: 500;
}
.hero-lede {
  margin-top: var(--space-6);
  max-width: 60ch;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}
.hero-lede strong { color: var(--color-text); font-weight: 600; }

.hero-ctas {
  display: flex; flex-wrap: wrap; gap: var(--space-3);
  margin-top: var(--space-8);
}
.btn {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: transform var(--transition-interactive), background var(--transition-interactive), color var(--transition-interactive), border-color var(--transition-interactive);
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn-primary:hover { background: var(--color-primary-hover); color: var(--color-text-inverse); transform: translateY(-1px); }
.btn-ghost {
  border-color: var(--color-border-strong);
  color: var(--color-text);
}
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* Terminal */
.term {
  margin-top: var(--space-12);
  background: var(--term-bg);
  border: 1px solid var(--term-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  max-width: 920px;
}
.term-bar {
  display: flex; align-items: center; gap: 6px;
  padding: var(--space-3) var(--space-4);
  background: color-mix(in oklab, var(--term-bg) 80%, #0c1110);
  border-bottom: 1px solid var(--term-border);
}
.term-dot { width: 11px; height: 11px; border-radius: 50%; background: #2b3432; }
.term-dot:nth-child(1) { background: #ff5f57; }
.term-dot:nth-child(2) { background: #febc2e; }
.term-dot:nth-child(3) { background: #28c840; }
.term-path {
  margin-left: var(--space-4);
  font-family: var(--font-mono);
  font-size: 12px;
  color: #6b7f7c;
}
.term-body {
  padding: var(--space-5) var(--space-6);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.75;
  color: #bfd4d0;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}
.term-body .p { color: #4fd1c5; }
.term-body .c { color: #8ad7cf; }
.term-body .m { color: #e2c97a; }
.term-body .d { color: #6b7f7c; font-style: italic; }
.term-body .ok { color: #6ce29b; }
.term-body .warn { color: #f59e0b; }
.term-body .cursor {
  display: inline-block;
  width: 8px;
  animation: blink 1.1s steps(1) infinite;
  color: #4fd1c5;
}
@keyframes blink { 50% { opacity: 0; } }

/* ========== Sections ========== */
.section {
  padding: clamp(var(--space-16), 9vw, var(--space-24)) clamp(var(--space-4), 4vw, var(--space-10));
  max-width: var(--content-wide);
  margin: 0 auto;
}
.section.alt {
  background: linear-gradient(180deg, transparent, var(--color-surface) 10%, var(--color-surface) 90%, transparent);
  max-width: none;
  padding-left: clamp(var(--space-4), 4vw, var(--space-10));
  padding-right: clamp(var(--space-4), 4vw, var(--space-10));
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}
.section.alt > * { max-width: var(--content-wide); margin-left: auto; margin-right: auto; }

.section-head {
  display: grid;
  grid-template-columns: 80px 1fr;
  grid-template-areas: 'id heading' '. sub';
  gap: var(--space-2) var(--space-6);
  margin-bottom: var(--space-12);
  align-items: baseline;
}
.section-id {
  grid-area: id;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  border-right: 1px solid var(--color-border);
  padding-right: var(--space-4);
  letter-spacing: 0.08em;
}
.section-head h2 {
  grid-area: heading;
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: -0.025em;
}
.section-sub {
  grid-area: sub;
  color: var(--color-text-muted);
  max-width: 55ch;
  font-size: var(--text-base);
}
@media (max-width: 640px) {
  .section-head { grid-template-columns: 1fr; grid-template-areas: 'id' 'heading' 'sub'; gap: var(--space-2); }
  .section-id { border-right: none; padding-right: 0; }
}

.prose p { margin-bottom: var(--space-4); color: var(--color-text); }
.prose-wide { max-width: 72ch; }

.pill-row {
  display: flex; flex-wrap: wrap; gap: var(--space-2);
  margin-top: var(--space-6);
}
.pill {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-muted);
  background: color-mix(in oklab, var(--color-surface) 60%, transparent);
}

/* Research questions */
.q-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-4);
}
.q-card {
  position: relative;
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  transition: transform var(--transition-interactive), border-color var(--transition-interactive);
}
.q-card:hover { border-color: var(--color-primary); transform: translateY(-2px); }
.q-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-primary);
  background: var(--color-primary-highlight);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}
.q-card h3 { font-size: var(--text-lg); font-weight: 600; margin-bottom: var(--space-2); }
.q-card p { color: var(--color-text-muted); font-size: var(--text-sm); }

/* Split */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-6), 4vw, var(--space-12));
  align-items: start;
}
@media (max-width: 760px) { .split { grid-template-columns: 1fr; } }
.h-inline {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
  font-weight: 500;
}
.bullets { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); }
.bullets li {
  position: relative;
  padding-left: var(--space-5);
  color: var(--color-text);
  max-width: 60ch;
}
.bullets li::before {
  content: '';
  position: absolute;
  left: 0; top: 0.75em;
  width: 10px; height: 1px;
  background: var(--color-primary);
}
.bullets.numbered { counter-reset: n; }
.bullets.numbered li { padding-left: var(--space-8); }
.bullets.numbered li::before {
  counter-increment: n;
  content: counter(n, decimal-leading-zero);
  top: 0; left: 0;
  width: auto; height: auto; background: transparent;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-primary);
  font-weight: 600;
}

/* Toolkit */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
}
.tool {
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive), transform var(--transition-interactive);
}
.tool:hover { border-color: var(--color-primary); transform: translateY(-2px); }
.tool header {
  display: flex; align-items: baseline; gap: var(--space-3);
  margin-bottom: var(--space-2);
}
.tool-kind {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  background: var(--color-primary-highlight);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}
.tool h3 { font-size: var(--text-base); font-weight: 600; font-family: var(--font-body); letter-spacing: -0.01em; }
.tool p { color: var(--color-text-muted); font-size: var(--text-sm); }

/* Workflow */
.workflow {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  counter-reset: w;
}
.workflow li {
  display: flex; gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.workflow li::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--color-primary);
  opacity: 0.25;
  transition: opacity var(--transition-interactive);
}
.workflow li:hover::before { opacity: 1; }
.step-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 700;
  flex: none;
}
.workflow h3 { font-size: var(--text-base); font-weight: 600; margin-bottom: var(--space-1); font-family: var(--font-body); }
.workflow p { color: var(--color-text-muted); font-size: var(--text-sm); }

/* Devices */
.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-4);
}
.device {
  position: relative;
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.device.control {
  border-color: var(--color-primary);
  background: linear-gradient(180deg, var(--color-primary-highlight), var(--color-surface));
}
.device.featured {
  border-color: var(--color-primary);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--color-primary) 14%, transparent), var(--color-surface));
  box-shadow:
    0 0 0 1px var(--color-primary),
    0 20px 60px -20px color-mix(in srgb, var(--color-primary) 45%, transparent);
  grid-column: span 2;
}
.device.featured .device-badge {
  background: var(--color-primary);
  color: var(--color-bg);
  border-color: var(--color-primary);
}
.device.featured::before {
  content: "Most vulnerable";
  position: absolute;
  top: var(--space-4); left: var(--space-5);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  padding: 4px 8px;
  border: 1px solid var(--color-primary);
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
}
.device.featured h3 { margin-top: var(--space-6); font-size: var(--text-xl); }
@media (max-width: 720px) {
  .device.featured { grid-column: span 1; }
}
.device-badge {
  position: absolute;
  top: var(--space-4); right: var(--space-4);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-primary);
  padding: 3px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
}
.device h3 { font-size: var(--text-lg); font-weight: 600; margin-bottom: var(--space-1); }
.device .source {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.device dl { display: flex; flex-direction: column; gap: var(--space-2); }
.device dl > div { display: grid; grid-template-columns: 110px 1fr; gap: var(--space-3); font-size: var(--text-sm); align-items: baseline; }
.device dd .mono { font-size: 12.5px; word-break: break-all; }
.device dt { color: var(--color-text-faint); font-family: var(--font-mono); font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.06em; }
.device dd { color: var(--color-text); }
.small-note {
  margin-top: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: italic;
}

/* Metrics */
.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.metric {
  display: flex; flex-direction: column; gap: var(--space-2);
  padding: var(--space-5);
  background: var(--color-surface);
}
.metric-label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}
.metric-value {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
}

.callout {
  margin-top: var(--space-10);
  padding: var(--space-6);
  border-left: 3px solid var(--color-primary);
  background: linear-gradient(90deg, var(--color-primary-highlight), transparent);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}
.callout-k {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.callout p { max-width: 72ch; color: var(--color-text); }

/* Recommendations */
.rec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}
@media (max-width: 760px) { .rec-grid { grid-template-columns: 1fr; } }
.rec {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.rec h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
}

/* Files */
.file-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
}
.file-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-5);
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  text-decoration: none;
  transition: transform var(--transition-interactive), border-color var(--transition-interactive), background var(--transition-interactive);
}
.file-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  background: color-mix(in oklab, var(--color-surface) 80%, var(--color-primary-highlight));
  color: var(--color-text);
}
.file-card:hover .file-action { color: var(--color-primary); }
.file-ico {
  width: 48px; height: 48px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  flex: none;
}
.file-meta h3 {
  font-size: var(--text-base);
  font-weight: 600;
  font-family: var(--font-body);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-1);
}
.file-meta p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin: 0;
}
.file-kind {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 4px;
}
.file-action {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}
@media (max-width: 520px) {
  .file-card { grid-template-columns: auto 1fr; }
  .file-action { grid-column: 1 / -1; text-align: right; }
}

/* Inline link with icon (footer LinkedIn) */
.link-inline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  margin-top: var(--space-2);
}
.link-inline svg { flex: none; }

/* References */
.refs {
  list-style: none;
  counter-reset: r;
  display: flex; flex-direction: column; gap: var(--space-3);
  max-width: var(--content-default);
}
.refs li {
  counter-increment: r;
  position: relative;
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-12);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.refs li::before {
  content: '[' counter(r, decimal-leading-zero) ']';
  position: absolute;
  left: var(--space-4); top: var(--space-4);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-primary);
  font-weight: 700;
}
.refs li em { color: var(--color-text); font-style: italic; }
.refs a { word-break: break-word; }

/* Footer */
.site-footer {
  margin-top: var(--space-20);
  padding: var(--space-16) clamp(var(--space-4), 4vw, var(--space-10)) var(--space-8);
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
}
.foot-grid {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: var(--space-10);
}
.foot-grid.two-col { grid-template-columns: 1.8fr 1fr; }
@media (max-width: 760px) {
  .foot-grid, .foot-grid.two-col { grid-template-columns: 1fr; gap: var(--space-6); }
}
.foot-brand {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.foot-text { color: var(--color-text-muted); font-size: var(--text-sm); max-width: 52ch; }
.site-footer h4 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  font-weight: 500;
}
.site-footer p { color: var(--color-text); font-size: var(--text-sm); margin-bottom: 2px; }
.site-footer a { font-size: var(--text-sm); }
.foot-bottom {
  max-width: var(--content-wide);
  margin: var(--space-12) auto 0;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
}

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 700ms ease, transform 700ms cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.in { opacity: 1; transform: none; }