/* =============================================================================
   Open Physics Problems — UI/UX Pro Max design system
   Style: Modern Dark (Cinema) + Data-Dense Dashboard hybrid
   Source: nextlevelbuilder/ui-ux-pro-max-skill
   Dials: variance 6 · motion 4 · density 8
   ============================================================================= */

@import url("https://fonts.googleapis.com/css2?family=Exo:wght@400;500;600;700;800&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap");

:root {
  color-scheme: dark;

  /* Cinema dark surfaces — avoid pure #000 OLED smear */
  --bg-deep: #070b14;
  --bg-base: #0a101c;
  --bg-elevated: #111827;
  --surface: #151d2e;
  --surface-2: #1a2438;
  --surface-glass: oklch(0.28 0.03 260 / 0.55);

  /* Scientific accents */
  --primary: #14b8a6; /* teal */
  --primary-dim: oklch(0.72 0.12 180 / 0.16);
  --secondary: #8b5cf6; /* violet */
  --secondary-dim: oklch(0.65 0.16 290 / 0.16);
  --cta: #f97316;
  --sprint: #2dd4bf;
  --stretch: #fbbf24;
  --multi: #60a5fa;
  --na: #fb7185;

  --text: #f1f5f9;
  --text-secondary: #cbd5e1;
  --muted: #94a3b8;
  --faint: #64748b;

  --border: oklch(1 0 0 / 0.08);
  --border-strong: oklch(1 0 0 / 0.14);
  --ring: oklch(0.75 0.12 180 / 0.55);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px; /* pro-max cinema cards */
  --radius-xl: 20px;
  --pad-card: 12px; /* density 8 */

  --font-display: "Exo", ui-sans-serif, system-ui, sans-serif;
  --font-body: "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --ease: cubic-bezier(0.16, 1, 0.3, 1); /* Expo.out from pro-max */
  --dur: 180ms;
  --dur-slow: 280ms;

  --nav-h: 56px;
  --filter-h: 0px;
  --shadow: 0 1px 0 oklch(1 0 0 / 0.04), 0 10px 32px oklch(0 0 0 / 0.35);
  --glow-primary: 0 0 32px oklch(0.7 0.12 180 / 0.22);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .ambient,
  .card.is-enter {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg-base);
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  touch-action: manipulation;
  -webkit-tap-highlight-color: oklch(0.7 0.1 180 / 0.12);
  overflow-x: hidden;
}

/* Ambient cinema blobs */
.ambient {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}
.ambient span {
  position: absolute;
  border-radius: 50%;
  filter: blur(64px);
  opacity: 0.11;
  will-change: transform;
}
.ambient .b1 {
  width: 420px;
  height: 420px;
  background: #14b8a6;
  top: -8%;
  left: -6%;
}
.ambient .b2 {
  width: 360px;
  height: 360px;
  background: #8b5cf6;
  top: 10%;
  right: -8%;
  opacity: 0.09;
}
.ambient .b3 {
  width: 280px;
  height: 280px;
  background: #3b82f6;
  bottom: 5%;
  left: 35%;
  opacity: 0.07;
}
@media (prefers-reduced-motion: no-preference) {
  .ambient .b1 {
    animation: drift1 28s var(--ease) infinite alternate;
  }
  .ambient .b2 {
    animation: drift2 34s var(--ease) infinite alternate;
  }
  .ambient .b3 {
    animation: drift3 30s var(--ease) infinite alternate;
  }
}
@keyframes drift1 {
  to {
    transform: translate(40px, 30px);
  }
}
@keyframes drift2 {
  to {
    transform: translate(-30px, 50px);
  }
}
@keyframes drift3 {
  to {
    transform: translate(20px, -40px);
  }
}

.page {
  position: relative;
  z-index: 1;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: var(--space-3);
  top: var(--space-3);
  z-index: 100;
  padding: 0.55rem 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--text);
  color: var(--bg-deep);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

a {
  color: var(--primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
}
a:hover {
  color: #5eead4;
  text-decoration-thickness: 2px;
}
a:focus-visible,
button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

.wrap {
  width: min(1200px, calc(100% - 1.5rem));
  margin: 0 auto;
}

/* —— Nav (glass) —— */
.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  min-height: var(--nav-h);
  background: oklch(0.14 0.02 260 / 0.72);
  backdrop-filter: blur(18px) saturate(1.25);
  -webkit-backdrop-filter: blur(18px) saturate(1.25);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: var(--nav-h);
  padding: 0.5rem 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
  min-width: 0;
  font-size: 0.98rem;
}
.brand:hover {
  color: var(--text);
  text-decoration: none;
}
.brand-mark {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--sprint), var(--multi), var(--secondary));
  box-shadow: 0 0 0 1px oklch(1 0 0 / 0.1), var(--glow-primary);
}
.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 2px;
  min-width: 0;
}
.nav-links a {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 500;
  text-decoration: none;
  padding: 0.42rem 0.55rem;
  border-radius: var(--radius-sm);
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  transition:
    color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}
.nav-links a:hover {
  color: var(--text);
  background: oklch(1 0 0 / 0.05);
  text-decoration: none;
}
.gh-btn {
  border: 1px solid var(--border-strong) !important;
  background: oklch(1 0 0 / 0.04) !important;
  color: var(--text) !important;
  padding: 0.4rem 0.8rem !important;
  border-radius: 999px !important;
  margin-left: 0.35rem;
  font-weight: 600 !important;
  transition:
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    transform 0.12s var(--ease) !important;
}
.gh-btn:hover {
  border-color: var(--primary) !important;
  background: var(--primary-dim) !important;
}
.gh-btn:active {
  transform: scale(0.97);
}

/* —— Hero —— */
.hero {
  padding: var(--space-6) 0 var(--space-4);
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--sprint);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 var(--space-3);
  background: var(--primary-dim);
  border: 1px solid oklch(0.75 0.12 180 / 0.25);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
}
.kicker::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--sprint);
  box-shadow: 0 0 10px var(--sprint);
}
@media (prefers-reduced-motion: no-preference) {
  .kicker::before {
    animation: pulse 2.2s var(--ease) infinite;
  }
}
@keyframes pulse {
  50% {
    opacity: 0.35;
  }
}

.hero h1 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.8vw, 3.15rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  max-width: 17ch;
  text-wrap: balance;
  font-weight: 800;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(105deg, var(--sprint) 0%, var(--multi) 50%, var(--secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead {
  max-width: 62ch;
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin: 0 0 var(--space-4);
  text-wrap: pretty;
}
.lead b {
  color: var(--text);
  font-weight: 600;
}
.lead a {
  font-weight: 500;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 999px;
  padding: 0.7rem 1.15rem;
  min-height: 44px;
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 0.92rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition:
    transform 0.12s var(--ease),
    filter var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}
.btn:active {
  transform: scale(0.97);
}
.btn-primary {
  background: linear-gradient(135deg, #2dd4bf, #38bdf8);
  color: #042f2e;
  box-shadow: var(--glow-primary);
}
.btn-primary:hover {
  filter: brightness(1.06);
  text-decoration: none;
  color: #042f2e;
}
.btn-ghost {
  background: oklch(1 0 0 / 0.03);
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--primary);
  background: var(--primary-dim);
  text-decoration: none;
  color: var(--text);
}

/* KPI stats */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
}
@media (max-width: 800px) {
  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
.stat {
  appearance: none;
  font: inherit;
  text-align: left;
  width: 100%;
  min-height: 72px;
  background: var(--surface-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  color: inherit;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition:
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    transform 0.12s var(--ease);
}
.stat:hover {
  border-color: var(--border-strong);
  background: oklch(0.28 0.03 260 / 0.7);
}
.stat:active {
  transform: scale(0.97);
}
.stat .n {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.stat .l {
  color: var(--muted);
  font-size: 0.75rem;
  margin-top: 0.2rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}
.stat.sprint .n {
  color: var(--sprint);
}
.stat.stretch .n {
  color: var(--stretch);
}
.stat.multi .n {
  color: var(--multi);
}
.stat.na .n {
  color: var(--na);
}
.stat[aria-pressed="true"] {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary), var(--shadow);
}

/* Featured */
.featured {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}
.featured-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: var(--space-2);
  font-weight: 600;
}
.featured-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.feat {
  flex: 1 1 148px;
  min-width: 0;
  max-width: 220px;
  min-height: 88px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  cursor: pointer;
  font: inherit;
  color: inherit;
  text-align: left;
  transition:
    border-color var(--dur) var(--ease),
    transform 0.12s var(--ease),
    background-color var(--dur) var(--ease);
}
.feat:hover {
  border-color: oklch(0.75 0.12 180 / 0.4);
  background: var(--surface-2);
}
.feat:active {
  transform: scale(0.97);
}
.feat .fh {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--sprint);
  font-weight: 600;
  margin-bottom: 0.3rem;
  font-variant-numeric: tabular-nums;
}
.feat .ft {
  font-size: 0.84rem;
  line-height: 1.3;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Sections */
section {
  padding: var(--space-6) 0;
}
section h2 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 1.75rem);
  letter-spacing: -0.025em;
  text-wrap: balance;
  scroll-margin-top: calc(var(--nav-h) + 12px);
  font-weight: 700;
}
.section-lead {
  color: var(--muted);
  max-width: 68ch;
  margin: 0 0 var(--space-4);
  text-wrap: pretty;
  font-size: 0.98rem;
}

.panel {
  background: var(--surface-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow);
}
.panel h3 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: -0.015em;
  font-weight: 650;
}
.panel p,
.panel li {
  color: var(--muted);
  font-size: 0.92rem;
}
.panel ul {
  margin: 0.3rem 0 0;
  padding-left: 1.1rem;
}
.panel li {
  margin: 0.25rem 0;
}
.panel a {
  overflow-wrap: anywhere;
}

.manifesto-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}
@media (max-width: 900px) {
  .manifesto-grid {
    grid-template-columns: 1fr;
  }
}

.quote {
  border-left: 3px solid var(--sprint);
  padding: 0.1rem 0 0.1rem 0.85rem;
  margin: var(--space-3) 0 0;
  color: var(--text);
  font-size: 0.95rem;
  text-wrap: pretty;
}

.formula-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.formula-table th,
.formula-table td {
  text-align: left;
  padding: 0.65rem 0.45rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.formula-table th {
  color: var(--faint);
  font-weight: 650;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
}
.formula-table td {
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
}

.pill {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1.4;
}
.pill.sprint {
  background: oklch(0.75 0.12 180 / 0.12);
  color: var(--sprint);
  border: 1px solid oklch(0.75 0.12 180 / 0.28);
}
.pill.stretch {
  background: oklch(0.85 0.12 90 / 0.12);
  color: var(--stretch);
  border: 1px solid oklch(0.85 0.12 90 / 0.28);
}
.pill.multi-sprint {
  background: oklch(0.7 0.12 250 / 0.12);
  color: var(--multi);
  border: 1px solid oklch(0.7 0.12 250 / 0.28);
}
.pill.not-agentic {
  background: oklch(0.7 0.14 15 / 0.12);
  color: var(--na);
  border: 1px solid oklch(0.7 0.14 15 / 0.28);
}

/* Clusters */
.cluster-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-3);
}
.cluster-card {
  background: var(--surface-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow);
  transition: border-color var(--dur) var(--ease);
}
.cluster-card:hover {
  border-color: var(--border-strong);
}
.cluster-card h3 {
  margin: 0 0 0.25rem;
  font-family: var(--font-display);
  font-size: 1.02rem;
  letter-spacing: -0.02em;
}
.cluster-card .cblurb {
  color: var(--muted);
  font-size: 0.84rem;
  margin: 0 0 var(--space-3);
  line-height: 1.4;
}
.cluster-card .cn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--faint);
  margin-bottom: var(--space-2);
  font-variant-numeric: tabular-nums;
}
.field-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.field-chip {
  border: 1px solid var(--border);
  background: oklch(1 0 0 / 0.03);
  color: var(--text);
  border-radius: 999px;
  padding: 0.35rem 0.65rem;
  min-height: 36px;
  font-size: 0.78rem;
  cursor: pointer;
  font-family: inherit;
  transition:
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    transform 0.12s var(--ease);
}
.field-chip:hover,
.field-chip.active {
  border-color: var(--primary);
  background: var(--primary-dim);
}
.field-chip:active {
  transform: scale(0.97);
}
.field-chip b {
  color: var(--primary);
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
  font-size: 0.74rem;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-2);
}
@media (max-width: 960px) {
  .steps {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 520px) {
  .steps {
    grid-template-columns: 1fr;
  }
}
.step {
  background: var(--surface-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}
.step .num {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.8rem;
  background: linear-gradient(135deg, var(--primary-dim), var(--secondary-dim));
  color: var(--sprint);
  margin-bottom: var(--space-2);
}
.step h3 {
  margin: 0 0 0.25rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
}
.step p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.4;
}

/* Board */
#board {
  scroll-margin-top: calc(var(--nav-h) + 8px);
}
.board-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  align-items: end;
  margin-bottom: var(--space-2);
}
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.legend span {
  font-size: 0.75rem;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-mono);
}
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.dot.sprint {
  background: var(--sprint);
}
.dot.stretch {
  background: var(--stretch);
}
.dot.multi {
  background: var(--multi);
}
.dot.na {
  background: var(--na);
}

/* Sticky filter dock */
.controls-dock {
  position: sticky;
  top: var(--nav-h);
  z-index: 30;
  margin: 0 0 var(--space-3);
  padding: var(--space-3);
  background: oklch(0.14 0.02 260 / 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}
.controls label.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;
}
.controls input,
.controls select {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.55rem 0.7rem;
  font-size: 0.88rem;
  font-family: inherit;
  min-height: 40px;
  transition: border-color var(--dur) var(--ease);
}
.controls input {
  flex: 1 1 200px;
  min-width: 160px;
}
.controls input:hover,
.controls select:hover {
  border-color: var(--border-strong);
}
.controls input::placeholder {
  color: var(--faint);
}
.controls-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-2);
  width: 100%;
}
#count-label {
  color: var(--muted);
  font-size: 0.82rem;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}
.btn-clear {
  appearance: none;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  padding: 0.35rem 0.7rem;
  min-height: 32px;
  font-size: 0.78rem;
  font-family: inherit;
  cursor: pointer;
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform 0.12s var(--ease);
}
.btn-clear:hover {
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-clear:active {
  transform: scale(0.97);
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-2);
}
.card {
  content-visibility: auto;
  contain-intrinsic-size: auto 180px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--pad-card);
  cursor: pointer;
  min-height: 156px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  text-align: left;
  font: inherit;
  color: inherit;
  width: 100%;
  box-shadow: var(--shadow);
  transition:
    transform 0.12s var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    opacity var(--dur-slow) var(--ease);
}
@media (prefers-reduced-motion: no-preference) {
  .card.is-enter {
    animation: cardIn 0.35s var(--ease) both;
  }
}
@keyframes cardIn {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
.card:hover {
  transform: translateY(-2px);
  border-color: oklch(0.72 0.1 200 / 0.35);
  background: var(--surface-2);
}
.card:active {
  transform: scale(0.98);
}
.card .top {
  display: flex;
  justify-content: space-between;
  gap: 0.45rem;
  align-items: flex-start;
  margin-bottom: 0.4rem;
  min-width: 0;
}
.card .card-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.25;
  text-wrap: balance;
  overflow-wrap: anywhere;
  display: block;
}
.card .hook {
  color: var(--text-secondary);
  font-size: 0.86rem;
  margin: 0.2rem 0 0.4rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card .summary {
  color: var(--muted);
  font-size: 0.8rem;
  margin: 0;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: var(--space-2);
  color: var(--faint);
  font-size: 0.68rem;
  min-width: 0;
}
.card .meta span {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.08rem 0.4rem;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
}

.empty {
  color: var(--muted);
  padding: var(--space-5);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  text-align: center;
  grid-column: 1 / -1;
  font-size: 0.92rem;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: oklch(0.08 0.02 260 / 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right))
    max(1rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
  overscroll-behavior: contain;
}
.modal-backdrop.open,
.modal-backdrop:not([hidden]) {
  display: flex;
}
.modal-backdrop[hidden] {
  display: none !important;
}
.modal {
  width: min(720px, 100%);
  max-height: min(86vh, 900px);
  overflow: auto;
  overscroll-behavior: contain;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: var(--space-4) var(--space-4) var(--space-5);
  box-shadow: 0 28px 90px oklch(0 0 0 / 0.55);
}
.modal header {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  align-items: flex-start;
}
.modal h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  text-wrap: balance;
  padding-right: 0.5rem;
}
.modal .close {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  width: 40px;
  height: 40px;
  min-width: 40px;
  min-height: 40px;
  cursor: pointer;
  flex-shrink: 0;
  font-size: 1rem;
  line-height: 1;
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform 0.12s var(--ease);
}
.modal .close:hover {
  color: var(--text);
  border-color: var(--primary);
}
.modal .close:active {
  transform: scale(0.97);
}
.modal .body {
  margin-top: var(--space-3);
  color: var(--muted);
}
.modal .body p {
  margin: 0.45rem 0;
  overflow-wrap: anywhere;
  font-size: 0.92rem;
}
.modal .body b {
  color: var(--text);
  font-weight: 600;
}
.modal .row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin: 0.5rem 0 0.15rem;
}
.harness {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.25rem;
}
.harness code {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  background: oklch(1 0 0 / 0.04);
  border: 1px solid var(--border);
  padding: 0.18rem 0.45rem;
  border-radius: 8px;
  color: var(--primary);
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: var(--space-6) 0 max(2.5rem, env(safe-area-inset-bottom));
  color: var(--muted);
  font-size: 0.88rem;
  position: relative;
  z-index: 1;
}
footer .cols {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-4);
}
@media (max-width: 800px) {
  footer .cols {
    grid-template-columns: 1fr;
  }
}
footer h4 {
  margin: 0 0 0.4rem;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.92rem;
}
footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
footer li {
  margin: 0.25rem 0;
}
.tagline {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--faint);
  margin-top: var(--space-3);
}
.version-chip {
  display: inline-block;
  margin-left: 0.3rem;
  padding: 0.08rem 0.42rem;
  border-radius: 999px;
  font-size: 0.68rem;
  border: 1px solid var(--border);
  color: var(--muted);
  vertical-align: middle;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

code {
  font-family: var(--font-mono);
  font-size: 0.86em;
}

@media (max-width: 720px) {
  .nav-links a:not(.gh-btn) {
    font-size: 0.78rem;
    padding: 0.32rem 0.4rem;
  }
  .wrap {
    width: min(1200px, calc(100% - 1rem));
  }
  .controls-dock {
    top: var(--nav-h);
    padding: var(--space-2);
  }
}