/* ============================================================
   VeloxQuant-MLX landing page styles
   Zero-build static CSS — served as-is by Netlify (cp -r landing/* dist/)
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #08080f;
  --surface:   #12121e;
  --border:    #1e1e35;
  --accent:    #00d4ff;
  --accent-rgb: 0,212,255;
  --accent-hover: #33ddff;
  --purple:    #7c3aed;
  --text:      #e2e8f0;
  --muted:     #94a3b8;
  --code-bg:   #1e1e2e;
  --code-text: #cdd6f4;
  --nav-bg:    rgba(8,8,15,0.75);
  --grid-line: rgba(0,212,255,0.04);
  --radius:    12px;
}

/* Light theme — applied when the OS prefers light, or when the user
   picks "light" via the nav toggle (data-theme wins either way). */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg:        #f7f8fb;
    --surface:   #ffffff;
    --border:    #e2e5ec;
    --accent:    #0284c7;
    --accent-rgb: 2,132,199;
    --accent-hover: #309ad1;
    --purple:    #6d28d9;
    --text:      #14141f;
    --muted:     #5b6270;
    --code-bg:   #eef0f6;
    --code-text: #1f2430;
    --nav-bg:    rgba(247,248,251,0.8);
    --grid-line: rgba(2,132,199,0.06);
  }
}

:root[data-theme="light"] {
  --bg:        #f7f8fb;
  --surface:   #ffffff;
  --border:    #e2e5ec;
  --accent:    #0284c7;
  --accent-rgb: 2,132,199;
  --accent-hover: #309ad1;
  --purple:    #6d28d9;
  --text:      #14141f;
  --muted:     #5b6270;
  --code-bg:   #eef0f6;
  --code-text: #1f2430;
  --nav-bg:    rgba(247,248,251,0.8);
  --grid-line: rgba(2,132,199,0.06);
}

:root[data-theme="dark"] {
  --bg:        #08080f;
  --surface:   #12121e;
  --border:    #1e1e35;
  --accent:    #00d4ff;
  --accent-rgb: 0,212,255;
  --accent-hover: #33ddff;
  --purple:    #7c3aed;
  --text:      #e2e8f0;
  --muted:     #94a3b8;
  --code-bg:   #1e1e2e;
  --code-text: #cdd6f4;
  --nav-bg:    rgba(8,8,15,0.75);
  --grid-line: rgba(0,212,255,0.04);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  transition: background 0.2s ease, color 0.2s ease;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ===== NAV ===== */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 60px;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active { color: var(--accent); }

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Hamburger toggle (mobile nav) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 110;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--muted);
  border-radius: 2px;
  transition: all 0.25s ease;
  display: block;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); background: var(--accent); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background: var(--accent); }

/* ===== THEME TOGGLE ===== */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.theme-toggle:hover { border-color: var(--accent); }

.theme-icon { font-size: 0.95rem; line-height: 1; }
.theme-icon-moon { display: none; }

/* Dark theme: show the moon (click to go light). Light theme: show the sun. */
:root[data-theme="dark"] .theme-icon-sun,
:root:not([data-theme="light"]):not([data-theme="dark"]) .theme-icon-sun { display: none; }
:root[data-theme="dark"] .theme-icon-moon,
:root:not([data-theme="light"]):not([data-theme="dark"]) .theme-icon-moon { display: block; }
:root[data-theme="light"] .theme-icon-sun { display: block; }
:root[data-theme="light"] .theme-icon-moon { display: none; }

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]):not([data-theme="light"]) .theme-icon-sun { display: block; }
  :root:not([data-theme="dark"]):not([data-theme="light"]) .theme-icon-moon { display: none; }
}

/* ===== HERO ===== */
#hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 5rem 1.5rem 4rem;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  animation: gridShift 20s linear infinite;
  pointer-events: none;
}

#hero::after {
  content: '';
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(700px, 90vw);
  height: min(700px, 90vw);
  background: radial-gradient(circle, rgba(var(--accent-rgb),0.07) 0%, transparent 70%);
  pointer-events: none;
}

.particles-container {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

@keyframes gridShift {
  0%   { background-position: 0 0, 0 0; }
  100% { background-position: 48px 48px, 48px 48px; }
}

.hero-content { position: relative; z-index: 1; width: 100%; max-width: 820px; }

.badge {
  display: inline-block;
  padding: 0.25rem 0.9rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: 1.5rem;
  background: rgba(var(--accent-rgb),0.06);
  animation: install-pulse 2.5s ease-in-out infinite;
}

.badge-new {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: rgba(124,58,237,0.25);
  color: #a78bfa;
  border: 1px solid rgba(124,58,237,0.4);
  margin-left: 0.4rem;
  vertical-align: middle;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  animation: headline-slide-in 0.8s ease-out;
}

h1 span {
  color: var(--accent);
  position: relative;
  display: inline-block;
}

h1 span::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  animation: accent-underline 0.6s ease-out 0.3s backwards;
}

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

@keyframes accent-underline {
  from { width: 0; opacity: 0; }
  to   { width: 100%; opacity: 1; }
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--muted);
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

.hero-oneliner {
  font-size: 1rem;
  color: var(--muted);
  max-width: 620px;
  margin: 0 auto 2rem;
}

.install-block {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.7rem 1.2rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  color: var(--code-text);
  margin-bottom: 2rem;
  cursor: pointer;
  transition: border-color 0.2s;
  animation: install-pulse 2.5s ease-in-out infinite;
  max-width: 100%;
  overflow-x: auto;
  white-space: nowrap;
}

.install-block:hover { border-color: var(--accent); }
.install-block .dollar { color: var(--accent); user-select: none; }

@keyframes install-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0.3); border-color: var(--border); }
  50%      { box-shadow: 0 0 12px 3px rgba(var(--accent-rgb), 0.15); border-color: rgba(var(--accent-rgb), 0.5); }
}

.copy-btn {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  transition: color 0.2s;
  font-size: 0.8rem;
  font-family: 'Inter', sans-serif;
}

.copy-btn:hover { color: var(--accent); }
.copy-btn.copied {
  color: #4ade80;
  animation: button-pop 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes button-pop {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.15); }
  100% { transform: scale(1); }
}

.cta-row {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  will-change: transform;
  transition: transform 0.2s cubic-bezier(0.23, 1, 0.32, 1),
              background 0.2s ease,
              box-shadow 0.2s ease,
              border-color 0.2s ease,
              color 0.2s ease;
}

.btn-filled {
  background: var(--accent);
  color: #08080f;
  border: 1px solid var(--accent);
}

.btn-filled:hover {
  background: var(--accent-hover);
  animation: button-glow 1.5s ease-in-out infinite;
}

@keyframes button-glow {
  0%, 100% { box-shadow: 0 0 0 rgba(var(--accent-rgb), 0.4); }
  50%      { box-shadow: 0 0 16px rgba(var(--accent-rgb), 0.6); }
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

.btn-purple {
  background: rgba(124,58,237,0.15);
  color: #a78bfa;
  border: 1px solid rgba(124,58,237,0.4);
}

.btn-purple:hover { background: rgba(124,58,237,0.3); border-color: var(--purple); }

.btn span[data-icon] {
  display: inline-block;
  transition: transform 0.3s ease;
}

.btn:hover span[data-icon] { transform: translateX(4px); }

/* Hero pills */
.hero-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.hero-pill {
  display: inline-block;
  padding: 0.3rem 0.85rem;
  background: rgba(var(--accent-rgb),0.07);
  border: 1px solid rgba(var(--accent-rgb),0.25);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.01em;
}

/* Hero algo details (collapsible list of all methods) */
.hero-algo-details {
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0 auto 1.5rem;
  max-width: 620px;
  text-align: center;
}

.hero-algo-details summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.78rem;
  list-style: none;
  opacity: 0.7;
  transition: opacity 0.2s, color 0.2s;
}

.hero-algo-details summary::-webkit-details-marker { display: none; }
.hero-algo-details summary::before { content: '▸ '; font-size: 0.65rem; }
.hero-algo-details[open] summary::before { content: '▾ '; }
.hero-algo-details summary:hover { opacity: 1; color: var(--accent); }

.hero-algo-details[open] {
  padding: 0.6rem 0.9rem;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 8px;
  line-height: 1.7;
}

/* Hero tertiary links + meta row */
.hero-tertiary {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.hero-tertiary a {
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
}

.hero-tertiary a:hover { color: var(--accent); }
.hero-tertiary span { margin: 0 0.35rem; opacity: 0.4; }

.hero-meta {
  font-size: 0.8rem;
  color: var(--muted);
}

.hero-meta span { margin: 0 0.4rem; opacity: 0.4; }

/* Badge typing cursor */
.badge-cursor {
  display: inline-block;
  width: 2px;
  height: 0.85em;
  background: var(--accent);
  vertical-align: middle;
  margin-left: 2px;
  animation: blink-cursor 0.7s step-end infinite;
}

@keyframes blink-cursor {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0; }
}

/* ===== SECTIONS COMMON ===== */
section {
  padding: 5rem 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-desc {
  color: var(--muted);
  max-width: 600px;
  margin-bottom: 3rem;
}

.section-head-center { text-align: center; }
.section-head-center .section-desc { margin-left: auto; margin-right: auto; }

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  max-width: 1100px;
  margin: 0 auto;
  animation: divider-fade-in 0.8s ease-in;
}

@keyframes divider-fade-in {
  from { opacity: 0; transform: scaleX(0); }
  to   { opacity: 1; transform: scaleX(1); }
}

/* ===== KV EXPLAINER ===== */
.explainer-section {
  padding: 3rem 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.explainer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.explainer-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.explainer-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.explainer-text {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.75;
  margin-top: 0.5rem;
}

/* ===== STAT CARDS ===== */
.stat-hero-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.stat-hero {
  background: linear-gradient(135deg, var(--surface) 60%, rgba(var(--accent-rgb),0.06));
  border-color: rgba(var(--accent-rgb),0.4) !important;
}

.stat-hero .stat-number { font-size: 4rem !important; }

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.25rem;
  text-align: center;
  transition: border-color 0.3s, transform 0.3s;
  position: relative;
  overflow: hidden;
  animation: pulse-glow 3s ease-in-out infinite;
}

.stat-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  animation: none;
  box-shadow: 0 0 32px rgba(var(--accent-rgb),0.16) !important;
}

.stat-card.purple:hover {
  border-color: var(--purple);
  box-shadow: 0 0 24px rgba(124,58,237,0.12) !important;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 24px rgba(var(--accent-rgb),0.08); }
  50%      { box-shadow: 0 0 32px rgba(var(--accent-rgb),0.16); }
}

.stat-card::after {
  content: '';
  position: absolute;
  left: 0; top: -100%;
  width: 100%; height: 60%;
  background: linear-gradient(to bottom, transparent 0%, rgba(var(--accent-rgb), 0.06) 50%, transparent 100%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.1s;
}

.stat-card:hover::after {
  opacity: 1;
  animation: scanline 0.7s ease-out forwards;
}

@keyframes scanline {
  0%   { top: -60%; }
  100% { top: 110%; }
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 0.5rem;
  display: inline-block;
}

.stat-card.purple .stat-number { color: #a78bfa; }

.stat-number.counting { animation: number-pop 0.8s ease-out; }

@keyframes number-pop {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.05); }
}

.stat-label {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
}

/* ===== ALGO CARDS (legacy single cards, e.g. VecInfer feature card) ===== */
.algo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.algo-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.3s, transform 0.3s;
}

.algo-card:hover {
  border-color: rgba(124,58,237,0.6);
  transform: translateY(-3px);
  box-shadow: 0 0 24px rgba(124,58,237,0.08);
  background-image: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.05) 50%, transparent 100%);
  background-position: -1000px 0;
  animation: card-shimmer 0.6s ease-in-out;
}

@keyframes card-shimmer {
  0%   { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

.algo-card.vecinfer-card {
  border-color: rgba(124,58,237,0.35);
  background: linear-gradient(135deg, #12121e 60%, rgba(124,58,237,0.06));
  grid-column: span 2;
  position: relative;
}

.algo-card.vecinfer-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: calc(var(--radius) + 1px);
  background: linear-gradient(135deg, rgba(var(--accent-rgb),0.5), rgba(124,58,237,0.5));
  z-index: -1;
  opacity: 0.25;
  transition: opacity 0.4s ease;
}

.algo-card.vecinfer-card:hover::before { opacity: 0.6; }

.algo-card.vecinfer-card:hover {
  border-color: var(--purple);
  box-shadow: 0 0 32px rgba(124,58,237,0.15);
  background: linear-gradient(135deg, #12121e 60%, rgba(124,58,237,0.06)),
              linear-gradient(90deg, transparent 0%, rgba(124,58,237,0.1) 50%, transparent 100%);
  background-position: 0 0, -1000px 0;
  animation: card-shimmer 0.6s ease-in-out;
}

.vecinfer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.algo-badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: rgba(124,58,237,0.18);
  color: #a78bfa;
  border: 1px solid rgba(124,58,237,0.3);
  margin-bottom: 0.85rem;
}

.algo-badge.new-badge {
  background: rgba(var(--accent-rgb),0.12);
  color: var(--accent);
  border-color: rgba(var(--accent-rgb),0.3);
}

.algo-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.algo-desc {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.6;
}

.algo-stats {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.algo-stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0.9rem;
  background: rgba(124,58,237,0.08);
  border: 1px solid rgba(124,58,237,0.15);
  border-radius: 8px;
  font-size: 0.82rem;
  gap: 0.5rem;
}

.algo-stat-row .label { color: var(--muted); }
.algo-stat-row .value { color: #a78bfa; font-weight: 700; font-family: 'JetBrains Mono', monospace; }

/* ===== METHOD LIBRARY (categorized algorithm cards) ===== */
.algo-library { display: flex; flex-direction: column; gap: 2.75rem; }

.cat-group.hidden-by-filter { display: none; }

.cat-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.cat-header::before {
  content: "";
  width: 3px; height: 1.1rem;
  border-radius: 3px;
  background: var(--chip, var(--purple));
  align-self: center;
}

.cat-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0;
}

.cat-blurb { font-size: 0.82rem; color: var(--muted); flex: 1; }

.cat-count {
  font-size: 0.72rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  color: var(--chip, var(--purple));
  background: color-mix(in srgb, var(--chip, var(--purple)) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--chip, var(--purple)) 30%, transparent);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
}

/* Uniform responsive card grid */
.cat-group .algo-grid {
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  align-items: start;
}

.cat-group .algo-card {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.4rem 1.4rem 1.1rem;
}

.cat-group .algo-card.hidden-by-filter { display: none; }

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.15rem;
}

.cat-chip {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--chip, var(--purple));
  background: color-mix(in srgb, var(--chip, var(--purple)) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--chip, var(--purple)) 28%, transparent);
  border-radius: 6px;
  padding: 0.16rem 0.55rem;
  text-transform: uppercase;
}

.new-pill {
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(var(--accent-rgb),0.12);
  border: 1px solid rgba(var(--accent-rgb),0.35);
  border-radius: 999px;
  padding: 0.12rem 0.5rem;
  text-transform: uppercase;
  animation: newpulse 2.4s ease-in-out infinite;
}

@keyframes newpulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(var(--accent-rgb),0); }
  50%     { box-shadow: 0 0 10px 0 rgba(var(--accent-rgb),0.25); }
}

.cat-group .algo-title { font-size: 1.05rem; margin-bottom: 0.1rem; }
.card-subtitle { font-size: 0.8rem; color: var(--muted); font-weight: 500; }
.card-summary { font-size: 0.84rem; margin: 0.15rem 0 0.3rem; }

.card-headline { margin-top: auto; padding-top: 0.35rem; }
.headline-stat {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 700;
  color: #a78bfa;
  background: rgba(124,58,237,0.1);
  border: 1px solid rgba(124,58,237,0.22);
  border-radius: 7px;
  padding: 0.3rem 0.6rem;
}

/* Progressive-disclosure expander */
.card-details { margin-top: 0.15rem; }
.card-details > summary {
  cursor: pointer;
  list-style: none;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  padding: 0.25rem 0;
  user-select: none;
  transition: color 0.2s;
}
.card-details > summary::-webkit-details-marker { display: none; }
.card-details > summary::after { content: " ▾"; font-size: 0.7rem; opacity: 0.8; }
.card-details[open] > summary::after { content: " ▴"; }
.card-details > summary:hover { color: var(--text); }
.card-details-body {
  padding-top: 0.6rem;
  border-top: 1px solid var(--border);
  margin-top: 0.35rem;
  animation: cardReveal 0.25s ease;
}
@keyframes cardReveal { from { opacity: 0; } to { opacity: 1; } }
.card-full-desc { font-size: 0.85rem; color: var(--muted); line-height: 1.6; }
.card-details-body .algo-stats { margin-top: 1rem; }

/* Quiet footer metadata (version · venue · citation) */
.card-meta {
  margin-top: 0.9rem;
  padding-top: 0.65rem;
  border-top: 1px solid var(--border);
  font-size: 0.72rem;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.01em;
  opacity: 0.75;
}

/* ===== CODE BLOCKS / QUICKSTART TABS ===== */
.code-section { padding: 5rem 1.5rem; max-width: 1100px; margin: 0 auto; }

.code-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.tab-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.8rem;
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  flex: 0 0 auto;
}

.tab-btn:hover { border-color: var(--accent); color: var(--accent); }
.tab-btn.active { background: rgba(var(--accent-rgb),0.1); border-color: var(--accent); color: var(--accent); }
.tab-btn.active-purple { background: rgba(124,58,237,0.1); border-color: var(--purple); color: #a78bfa; }
.tab-btn.active-green { background: rgba(34,197,94,0.1); border-color: #22c55e; color: #22c55e; }
.tab-btn.active-teal { background: rgba(45,212,191,0.1); border-color: #2dd4bf; color: #2dd4bf; }

.quickstart-hint {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
}
.quickstart-hint a { color: var(--accent); text-decoration: none; }
.quickstart-hint a:hover { text-decoration: underline; }

.code-panel { display: none; animation: fade-out 0.15s ease-out; }
.code-panel.active { display: block; animation: fade-in-code 0.25s ease-in; }

@keyframes fade-out { from { opacity: 1; } to { opacity: 0; } }
@keyframes fade-in-code { from { opacity: 0; } to { opacity: 1; } }

.code-wrap {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  gap: 0.5rem;
}

.code-lang {
  font-size: 0.75rem;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}

.code-copy {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.75rem;
  font-family: 'Inter', sans-serif;
  transition: color 0.2s;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  flex-shrink: 0;
}

.code-copy:hover { color: var(--accent); background: rgba(var(--accent-rgb),0.06); }
.code-copy.copied { color: #4ade80; }

pre {
  padding: 1.4rem 1.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--code-text);
}

.code-boot-char { opacity: 0; animation: char-appear 0.02s forwards; }
@keyframes char-appear { to { opacity: 1; } }

.code-cursor-blink {
  display: inline-block;
  width: 0.55em; height: 1em;
  background: var(--accent);
  vertical-align: text-bottom;
  animation: blink-cursor 0.6s step-end infinite;
  margin-left: 1px;
}

.kw  { color: #cba6f7; }
.fn  { color: #89dceb; }
.st  { color: #a6e3a1; }
.cm  { color: #585b70; font-style: italic; }
.nu  { color: #fab387; }
.op  { color: #89dceb; }
.id  { color: var(--code-text); }
.at  { color: #f38ba8; }

/* ===== BENCHMARK TABLE ===== */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

thead tr {
  background: rgba(var(--accent-rgb),0.07);
  border-bottom: 1px solid var(--border);
}

thead th {
  padding: 0.9rem 1.1rem;
  text-align: left;
  font-weight: 600;
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}

tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: rgba(var(--accent-rgb), 0.06) !important; transition: background 0.3s ease; }

tbody td {
  padding: 0.8rem 1.1rem;
  color: var(--text);
}

.td-highlight { color: var(--accent); font-weight: 600; font-family: 'JetBrains Mono', monospace; }
.td-purple { color: #a78bfa; font-weight: 700; font-family: 'JetBrains Mono', monospace; }
.td-muted { color: var(--muted); font-size: 0.8rem; }
.td-winner { color: #4ade80; font-weight: 700; font-family: 'JetBrains Mono', monospace; }

.td-winner:hover { animation: winner-pulse 0.6s ease; }
@keyframes winner-pulse {
  0%, 100% { text-shadow: 0 0 0px rgba(74, 222, 128, 0.5); }
  50%      { text-shadow: 0 0 8px rgba(74, 222, 128, 0.8); }
}

/* Bar cells */
.bar-cell {
  position: relative;
  padding: 0 !important;
  min-width: 90px;
}

.bar-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  background: rgba(var(--accent-rgb),0.1);
  border-right: 2px solid rgba(var(--accent-rgb),0.4);
  pointer-events: none;
  transition: width 0.4s ease;
}

.bar-fill-purple {
  background: rgba(124,58,237,0.1);
  border-right-color: rgba(124,58,237,0.5);
}

.bar-cell .bar-text {
  position: relative;
  z-index: 1;
  display: block;
  padding: 0.8rem 1.1rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 0.88rem;
}

.bench-note {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

/* ===== METHOD PICKER ("choose by goal") ===== */
.picker-intro {
  margin-bottom: 2.5rem;
  padding: 1.5rem;
  background: rgba(255,255,255,0.015);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.picker-intro-label {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.picker-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 1rem;
}

.picker-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.picker-card-link {
  text-decoration: none;
  display: block;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.picker-card-link:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 0 16px rgba(var(--accent-rgb),0.1);
}

.picker-card-link .picker-detail { transition: color 0.2s; }
.picker-card-link:hover .picker-detail { color: var(--text); }

.picker-goal {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.picker-method {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 0.4rem;
}

.picker-method.purple { color: #a78bfa; }

.picker-detail {
  font-size: 0.82rem;
  color: var(--muted);
}

/* ===== FILTER BAR ===== */
.algo-filter-bar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.filter-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.8rem;
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  padding: 0.45rem 1.1rem;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn.active { background: rgba(var(--accent-rgb),0.1); border-color: var(--accent); color: var(--accent); }

.algo-card.hidden-by-filter { display: none !important; }

.algo-no-results {
  display: none;
  grid-column: 1/-1;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  padding: 2rem;
}

/* ===== WHAT'S NEW (collapsible changelog) ===== */
.whats-new { margin: 0 0 2rem; max-width: 760px; }

.whats-new summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255,255,255,0.02);
  transition: border-color 0.2s, color 0.2s;
}
.whats-new summary::-webkit-details-marker { display: none; }
.whats-new summary::before { content: '▸'; font-size: 0.7rem; color: var(--accent); }
.whats-new[open] summary::before { content: '▾'; }
.whats-new summary:hover { border-color: var(--accent); color: var(--accent); }
.whats-new[open] summary { border-bottom-left-radius: 0; border-bottom-right-radius: 0; }

.whats-new-list {
  list-style: none;
  margin: 0;
  padding: 0.4rem 0.9rem 0.6rem;
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 8px 8px;
  background: rgba(255,255,255,0.015);
}

.whats-new-list li {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0.75rem;
  padding: 0.55rem 0;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--muted);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.whats-new-list li:last-child { border-bottom: none; }
.whats-new-list .wn-ver {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--accent);
  white-space: nowrap;
}
.whats-new-list .wn-body strong { color: var(--text); }
.whats-new-list code { font-family: 'JetBrains Mono', monospace; font-size: 0.82em; }

/* ===== INSTALL SECTION ===== */
.install-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

/* Grid children default to min-width:auto, which refuses to shrink below the
   intrinsic (unwrapped) width of a long code line inside <pre> — the classic
   "grid blowout" bug. min-width:0 lets the track shrink to the column width
   and defers overflow handling to pre's own overflow-x:auto. */
.install-grid > * {
  min-width: 0;
}

.req-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.req-list li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.req-list li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  font-size: 0.8rem;
}

/* ===== PROVENANCE STRIP ===== */
.provenance-strip {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1.1rem 1.5rem;
  text-align: center;
  background: rgba(255,255,255,0.01);
}

.provenance-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0.7;
  margin-bottom: 0.6rem;
}

.provenance-venues {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
  align-items: center;
}

.provenance-item {
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
}

.provenance-item em {
  font-style: normal;
  color: var(--text);
  font-weight: 500;
}

.provenance-dot {
  color: var(--border);
  font-size: 0.75rem;
}

/* ===== FOOTER ===== */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  list-style: none;
  margin-bottom: 1rem;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--accent); }

.footer-copy {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.footer-tagline {
  font-size: 0.75rem;
  color: var(--muted);
  opacity: 0.7;
  letter-spacing: 0.05em;
}

/* ===== FADE-IN (scroll reveal) ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== FLOATING PARTICLES (hero decoration) ===== */
@keyframes float-particle {
  0%, 100% { transform: translate(0, 0) rotate(0deg); opacity: 0.3; }
  25%      { transform: translate(40px, -30px) rotate(90deg); opacity: 0.6; }
  50%      { transform: translate(20px, -60px) rotate(180deg); opacity: 0.4; }
  75%      { transform: translate(-30px, -40px) rotate(270deg); opacity: 0.5; }
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent);
  border-radius: 50%;
  pointer-events: none;
  animation: float-particle 20s ease-in-out infinite;
}

.particle:nth-child(1) { left: 15%; top: 20%; animation-delay: 0s; }
.particle:nth-child(2) { left: 75%; top: 30%; animation-delay: 3s; }
.particle:nth-child(3) { left: 45%; top: 50%; animation-delay: 6s; animation-duration: 25s; }
.particle:nth-child(4) { left: 85%; top: 60%; animation-delay: 2s; animation-duration: 22s; }
.particle:nth-child(5) { left: 25%; top: 70%; animation-delay: 5s; animation-duration: 28s; }

/* ===== AURORA BACKGROUND BLOBS (hero decoration) ===== */
.aurora-container {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.aurora-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  mix-blend-mode: screen;
  opacity: 0.18;
}

.aurora-blob-1 {
  width: min(600px, 90vw); height: min(600px, 90vw);
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
  top: -100px; left: 10%;
  animation: aurora-drift-1 18s ease-in-out infinite;
}

.aurora-blob-2 {
  width: min(500px, 80vw); height: min(500px, 80vw);
  background: radial-gradient(circle, #7c3aed 0%, transparent 70%);
  top: 50px; right: 5%;
  animation: aurora-drift-2 22s ease-in-out infinite;
}

.aurora-blob-3 {
  width: min(400px, 70vw); height: min(400px, 70vw);
  background: radial-gradient(circle, #0d47a1 0%, transparent 70%);
  bottom: 0; left: 35%;
  animation: aurora-drift-3 26s ease-in-out infinite;
}

@keyframes aurora-drift-1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%      { transform: translate(80px, 60px) scale(1.1); }
  66%      { transform: translate(-40px, 100px) scale(0.95); }
}

@keyframes aurora-drift-2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%      { transform: translate(-90px, 50px) scale(1.05); }
  66%      { transform: translate(50px, -60px) scale(1.15); }
}

@keyframes aurora-drift-3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(60px, -80px) scale(1.1); }
}

/* ===== DATA STREAM (matrix rain canvas, hero decoration) ===== */
#matrix-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.045;
  z-index: 0;
}

/* ============================================================
   REDUCED MOTION — must stay last among behavioral overrides
   so it always wins regardless of source order elsewhere.
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .aurora-blob, #matrix-canvas { display: none; }
  .new-pill { animation: none; }
  .card-details-body { animation: none; }
  .algo-card.vecinfer-card::before { transition: none; }
}

/* ============================================================
   RESPONSIVE — mobile-first override breakpoints.
   Consolidated from what were 8 scattered @media blocks.
   Widest breakpoint first, narrowest last (each layers on top).
   ============================================================ */

/* ---- ≤1024px : tablet landscape / small laptop ---- */
@media (max-width: 1024px) {
  .stat-hero-row { grid-template-columns: 1fr 1fr; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .vecinfer-inner { grid-template-columns: 1fr; }
  .algo-card.vecinfer-card { grid-column: span 1; }
  .picker-grid { grid-template-columns: 1fr; }
}

/* ---- ≤768px : tablet portrait ---- */
@media (max-width: 768px) {
  .algo-grid { grid-template-columns: 1fr; }
  .cat-group .algo-grid { grid-template-columns: 1fr; }
  .cat-header { flex-wrap: wrap; }
  .algo-card.vecinfer-card { grid-column: span 1; }
  .install-grid { grid-template-columns: 1fr; }
  .explainer-grid,
  .explainer-grid-3 { grid-template-columns: 1fr; }
  .nav-links { gap: 1rem; }
  h1 { font-size: 2rem; }
  .stat-number { font-size: 2.2rem; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .whats-new-list li { grid-template-columns: 1fr; gap: 0.15rem; }
}

/* ---- ≤640px : the 8-item nav-links row cannot fit below this width
   (was previously gated at ≤480px, which left 481-640px phones with an
   unwrapped, overflowing nav row — widened so every phone in the test
   matrix, including 375/414px, gets the hamburger menu). ---- */
@media (max-width: 640px) {
  nav { padding: 0 1rem; }
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: fixed;
    inset: 60px 0 0 0;
    height: calc(100vh - 60px);
    /* Fully opaque, no backdrop-filter: a translucent panel let the hero
       badge's glow (box-shadow blur escapes the panel edges even at
       97% alpha) ghost through underneath it on mobile. */
    background: var(--bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    z-index: 105;
    border-top: 1px solid var(--border);
    overflow-y: auto;
  }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: 1.1rem; }
}

/* ---- ≤480px : phones ---- */
@media (max-width: 480px) {
  .stat-row { grid-template-columns: 1fr; }
  .stat-hero-row { grid-template-columns: 1fr; }
  .picker-intro { padding: 1.1rem; }
  .code-tabs { padding-bottom: 0.6rem; }
  .filter-btn, .tab-btn { padding: 0.5rem 0.9rem; }
}

/* ============================================================
   PLAYGROUND  (playground.html — reuses the same theme tokens)
   Redesigned: guided recommend → explore → verify flow.
   Additive & token-driven; resolves in both themes; reduced-motion aware.
   ============================================================ */

/* Local spacing scale + soft shadow, derived from existing tokens. */
#playground {
  --pg-shadow: 0 1px 3px rgba(0, 0, 0, 0.28);
  --pg-shadow-lift: 0 6px 20px rgba(0, 0, 0, 0.32);
  --pg-good: #22c55e;
  --pg-good-rgb: 34, 197, 94;
  --pg-warn: #f59e0b;
  --pg-err: #ef4444;
  max-width: 1080px;
  margin: 0 auto;
  padding: 6.5rem 1.25rem 4rem;
  position: relative;
}
:root[data-theme="light"] #playground,
:root:not([data-theme="dark"]) #playground {
  --pg-shadow: 0 1px 3px rgba(15, 23, 42, 0.1);
  --pg-shadow-lift: 0 8px 24px rgba(15, 23, 42, 0.12);
}

/* Faint accent grid backdrop, consistent with the landing page. */
#playground::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 62%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 62%);
  pointer-events: none;
}

/* ── Header ── */
.pg-header { text-align: center; margin-bottom: 1.75rem; }
.pg-eyebrow {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
  margin-bottom: 1rem;
}
.pg-header h1 { font-size: clamp(1.9rem, 5vw, 3rem); line-height: 1.1; }
.pg-header h1 span { color: var(--accent); }
.pg-sub { max-width: 640px; margin: 1rem auto 0; color: var(--muted); line-height: 1.6; }
.pg-headline {
  margin: 1rem auto 0;
  font-size: clamp(1rem, 2.6vw, 1.3rem);
  font-weight: 500;
  color: var(--text);
}
.pg-headline strong {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.pg-trust {
  max-width: 660px;
  margin: 0.9rem auto 0;
  font-size: 0.86rem;
  color: var(--muted);
  line-height: 1.6;
}
.pg-trust strong { color: var(--pg-good); }
.pg-sub code, .pg-trust code, .pg-disclaimer code, .pg-provenance code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.86em;
  color: var(--text);
  background: var(--code-bg);
  padding: 0.05em 0.35em;
  border-radius: 5px;
}

/* ── Persistent sticky "Your setup" bar ── */
.pg-setup {
  position: sticky;
  top: 60px; /* nav height */
  z-index: 20;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--pg-shadow);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.pg-setup-top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.9rem;
}
.pg-field-chip { flex: 1 1 150px; }
.pg-share-btn {
  margin-left: auto;
  align-self: flex-end;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.85rem;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, transform 0.1s;
  white-space: nowrap;
}
.pg-share-btn:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.pg-share-btn.copied { border-color: var(--pg-good); color: var(--pg-good); }

/* Field primitive (shared by setup, advanced, lab, bench). */
.pg-field { display: flex; flex-direction: column; gap: 0.35rem; }
.pg-field label {
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}
.pg-field select, .pg-field input {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 0.5rem 0.6rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  width: 100%;
  transition: border-color 0.15s;
}
.pg-field select:focus, .pg-field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.18);
}

/* Presets */
.pg-presets { margin-top: 0.9rem; }
.pg-presets-label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.pg-preset-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pg-preset-chip {
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--muted);
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease, transform 0.1s ease;
}
.pg-preset-chip:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.pg-preset-chip.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.1);
  font-weight: 600;
}
.pg-preset-custom { font-style: italic; }
.pg-preset-custom.active { font-style: normal; }

/* Advanced disclosure */
.pg-advanced { margin-top: 0.9rem; border-top: 1px solid var(--border); padding-top: 0.75rem; }
.pg-advanced summary {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.6rem;
  cursor: pointer;
  list-style: none;
  font-size: 0.82rem;
  color: var(--muted);
}
.pg-advanced summary::-webkit-details-marker { display: none; }
.pg-adv-label { font-weight: 600; color: var(--text); }
.pg-adv-label::before { content: "▸ "; color: var(--accent); }
.pg-advanced[open] .pg-adv-label::before { content: "▾ "; }
.pg-adv-hint { font-family: 'JetBrains Mono', monospace; font-size: 0.76rem; color: var(--muted); }
.pg-advanced[open] .pg-adv-hint { display: none; }
.pg-adv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.9rem;
  margin-top: 0.85rem;
}

/* ── Stepper / segmented control ── */
.pg-stepper {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.pg-step {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.7rem 0.9rem;
  cursor: pointer;
  color: var(--muted);
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
}
.pg-step:hover { border-color: var(--accent); transform: translateY(-1px); }
.pg-step-num {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
}
.pg-step-txt { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.pg-step-txt strong { font-size: 0.92rem; color: var(--text); }
.pg-step-txt em { font-style: normal; font-size: 0.74rem; color: var(--muted); }
.pg-step.active {
  border-color: var(--accent);
  background: rgba(var(--accent-rgb), 0.08);
}
.pg-step.active .pg-step-num {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}
.pg-step.active .pg-step-txt strong { color: var(--accent); }

/* ── Panels ── */
.pg-panel { display: none; }
.pg-panel.active { display: block; animation: pgFade 0.25s ease; }
@keyframes pgFade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

.pg-output {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  min-height: 120px;
  box-shadow: var(--pg-shadow);
}

/* ── Recommender hero card ── */
.pg-hero-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  margin-bottom: 1.1rem;
}
.pg-hero-badge { display: inline-flex; align-items: center; gap: 0.55rem; }
.pg-hero-badge-k {
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.pg-badge-method {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.1);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 0.3rem 0.7rem;
}
.pg-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.76rem;
  font-weight: 500;
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  border: 1px solid var(--border);
}
.pg-pill-ok { color: var(--pg-good); border-color: rgba(var(--pg-good-rgb), 0.4); background: rgba(var(--pg-good-rgb), 0.1); }
.pg-pill-muted { color: var(--muted); }

/* "?" tooltip */
.pg-tip {
  width: 16px;
  height: 16px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid currentColor;
  background: transparent;
  color: inherit;
  font-size: 0.66rem;
  font-weight: 600;
  cursor: help;
  position: relative;
  padding: 0;
}
.pg-tip::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 8px);
  right: -4px;
  width: max-content;
  max-width: 240px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.65rem;
  font-size: 0.74rem;
  font-weight: 400;
  line-height: 1.4;
  text-align: left;
  box-shadow: var(--pg-shadow-lift);
  opacity: 0;
  visibility: hidden;
  transform: translateY(3px);
  transition: opacity 0.15s, transform 0.15s, visibility 0.15s;
  z-index: 5;
}
.pg-tip:hover::after, .pg-tip:focus-visible::after { opacity: 1; visibility: visible; transform: none; }

/* Big ratio metric */
.pg-hero-metric { display: flex; align-items: baseline; gap: 0.6rem; margin: 0.3rem 0 1rem; }
.pg-hero-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(2.6rem, 8vw, 3.6rem);
  font-weight: 600;
  line-height: 1;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.pg-hero-metric-lbl { color: var(--muted); font-size: 0.9rem; }

.pg-rationale { color: var(--muted); line-height: 1.6; margin-bottom: 0.85rem; }
.pg-ratio { font-weight: 600; color: var(--text); font-family: 'JetBrains Mono', monospace; }

/* Knob chips */
.pg-knobs { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.pg-knob-chip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.76rem;
  color: var(--code-text);
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.24rem 0.55rem;
}

/* Memory bar */
.pg-membar { margin: 1.1rem 0; }
.pg-membar-row { display: flex; align-items: center; gap: 0.7rem; margin-bottom: 0.5rem; }
.pg-membar-label { flex: 0 0 92px; font-size: 0.8rem; color: var(--muted); text-align: right; }
.pg-membar-track { flex: 1; height: 24px; background: var(--code-bg); border-radius: 7px; overflow: hidden; }
.pg-membar-fill { height: 100%; border-radius: 7px; transition: width 0.55s cubic-bezier(.22,1,.36,1); }
.pg-membar-fill.fp16 { background: linear-gradient(90deg, #64748b, #94a3b8); }
.pg-membar-fill.comp { background: linear-gradient(90deg, var(--accent), var(--purple)); }
.pg-membar-val {
  flex: 0 0 88px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.pg-saved { margin-top: 0.5rem; color: var(--muted); font-size: 0.9rem; }
.pg-saved strong { color: var(--accent); font-family: 'JetBrains Mono', monospace; font-variant-numeric: tabular-nums; }

/* Calm inline callouts (warnings / ok) */
.pg-callouts { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 1rem; }
.pg-callout {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  font-size: 0.86rem;
  line-height: 1.5;
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  border-left: 3px solid;
}
.pg-callout-ic { flex: 0 0 auto; font-size: 0.78rem; line-height: 1.6; }
.pg-callout-warn {
  color: var(--text);
  border-left-color: var(--pg-warn);
  background: rgba(245, 158, 11, 0.08);
}
.pg-callout-warn .pg-callout-ic { color: var(--pg-warn); }
.pg-callout-ok {
  color: var(--muted);
  border-left-color: var(--pg-good);
  background: rgba(var(--pg-good-rgb), 0.08);
}
.pg-callout-ok .pg-callout-ic { color: var(--pg-good); }

.pg-error { color: var(--pg-err); font-family: 'JetBrains Mono', monospace; }

/* Hero CTAs */
.pg-cta-row { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.3rem; }
.pg-cta {
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: 8px;
  padding: 0.6rem 1.1rem;
  cursor: pointer;
  transition: transform 0.1s, filter 0.15s, border-color 0.15s, color 0.15s;
}
.pg-cta-primary {
  color: var(--bg);
  background: linear-gradient(90deg, var(--accent), var(--purple));
  border: 1px solid transparent;
}
.pg-cta-primary:hover { transform: translateY(-1px); filter: brightness(1.08); }
.pg-cta-ghost {
  color: var(--text);
  background: transparent;
  border: 1px solid var(--border);
}
.pg-cta-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }

/* ── Compression lab ── */
.pg-lab-controls { margin-bottom: 1.25rem; }
.pg-controls-label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.55rem;
}
.pg-method-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.6rem;
  margin-bottom: 1rem;
}
.pg-method-card {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 0.85rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
}
.pg-method-card:hover { border-color: var(--accent); transform: translateY(-1px); }
.pg-method-name { font-family: 'JetBrains Mono', monospace; font-weight: 600; font-size: 0.88rem; color: var(--text); }
.pg-method-ratio {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.pg-method-blurb { font-size: 0.76rem; color: var(--muted); line-height: 1.4; }
.pg-method-card.active {
  border-color: var(--accent);
  background: rgba(var(--accent-rgb), 0.08);
  box-shadow: 0 0 0 1px var(--accent) inset;
}
.pg-field-budget { max-width: 260px; }
.pg-budget-control { display: flex; align-items: center; gap: 0.4rem; }
.pg-budget-control input[type="number"] { width: 5.5rem; flex: 0 0 auto; }
.pg-budget-unit { color: var(--muted); font-size: 0.85rem; }
.pg-budget-auto {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background-color 0.15s;
}
.pg-budget-auto.active {
  color: var(--accent);
  border-color: rgba(var(--accent-rgb), 0.55);
  background: rgba(var(--accent-rgb), 0.12);
}
.pg-budget-auto:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.pg-budget-src { display: block; margin-top: 0.25rem; font-size: 0.72rem; color: var(--muted); }
@media (max-width: 520px) {
  .pg-budget-control { flex-wrap: wrap; }
}

/* Token tiles */
.pg-result-head { display: flex; flex-wrap: wrap; align-items: center; gap: 0.7rem; margin-bottom: 0.9rem; }
.pg-token-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; margin: 1rem 0 0.6rem; }
.pg-token-card {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem;
  text-align: center;
}
.pg-token-hi { border-color: var(--accent); background: rgba(var(--accent-rgb), 0.08); }
.pg-token-num {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(1.4rem, 4.5vw, 1.9rem);
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.pg-token-hi .pg-token-num { color: var(--accent); }
.pg-token-cap { display: block; margin-top: 0.35rem; font-size: 0.78rem; color: var(--muted); }

.pg-book { margin: 0.6rem 0; font-size: 0.9rem; color: var(--muted); }
.pg-book strong { color: var(--text); font-family: 'JetBrains Mono', monospace; }
.pg-approx {
  display: inline-block;
  margin-left: 0.4rem;
  font-size: 0.68rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.1rem 0.5rem;
}

/* Accounting-vs-resident caveat under the lab's "context that fits" estimate.
   Mirrors the recommender's honesty about which ratios free real RAM. */
.pg-lab-caveat {
  margin-top: 0.5rem;
  padding: 0.4rem 0.7rem;
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--muted);
  border-left: 3px solid var(--border);
  border-radius: 0 6px 6px 0;
  background: color-mix(in srgb, var(--surface) 82%, var(--border));
}
.pg-lab-caveat.is-warn { border-left-color: var(--pg-warn); }
.pg-lab-caveat.is-ok { border-left-color: var(--pg-good); }
.pg-lab-caveat strong { color: var(--text); }

/* Code snippet */
.pg-snippet { margin-top: 1.1rem; }
.pg-snippet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.45rem;
}
.pg-snippet-note { font-size: 0.76rem; color: var(--muted); }
.pg-snippet-note code { font-family: 'JetBrains Mono', monospace; color: var(--text); }
.pg-snippet pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  margin: 0;
}
.pg-snippet code.pg-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: var(--code-text);
  line-height: 1.55;
  white-space: pre;
}
.pg-code .tok-comment { color: var(--muted); font-style: italic; }
.pg-code .tok-str { color: var(--accent); }
.pg-copy {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 7px;
  padding: 0.3rem 0.7rem;
  font-size: 0.78rem;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.pg-copy:hover { border-color: var(--accent); color: var(--accent); }
.pg-copy.copied { border-color: var(--pg-good); color: var(--pg-good); }

/* ── Charts ── */
.pg-svg-wrap { overflow-x: auto; }
.pg-svg { width: 100%; min-width: 480px; height: auto; display: block; }
.pg-legend { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 0.7rem; }
.pg-legend-item { display: inline-flex; align-items: center; gap: 0.4rem; font-size: 0.82rem; color: var(--muted); }
.pg-legend-swatch { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.pg-provenance {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.9rem;
  font-size: 0.8rem;
  color: var(--muted);
}
.pg-prov-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--pg-good);
  box-shadow: 0 0 0 3px rgba(var(--pg-good-rgb), 0.2);
  flex: 0 0 auto;
}
.pg-caption { margin-top: 0.5rem; font-size: 0.82rem; color: var(--muted); line-height: 1.5; }

/* Skeleton shimmer while benchmarks load */
.pg-skeleton { --sk: var(--code-bg); }
.pg-skel-legend { display: flex; gap: 1rem; margin-bottom: 0.7rem; }
.pg-skel-legend span, .pg-skel-chart { position: relative; overflow: hidden; background: var(--code-bg); border-radius: 8px; }
.pg-skel-legend span { width: 110px; height: 14px; }
.pg-skel-chart { height: 260px; }
.pg-skel-legend span::after, .pg-skel-chart::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(var(--accent-rgb), 0.1), transparent);
  transform: translateX(-100%);
  animation: pgShimmer 1.3s infinite;
}
@keyframes pgShimmer { to { transform: translateX(100%); } }

/* Disclaimer */
.pg-disclaimer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ── Focus-visible rings for keyboard users ── */
#playground .pg-step:focus-visible,
#playground .pg-method-card:focus-visible,
#playground .pg-preset-chip:focus-visible,
#playground .pg-cta:focus-visible,
#playground .pg-copy:focus-visible,
#playground .pg-share-btn:focus-visible,
#playground .pg-tip:focus-visible,
#playground .pg-advanced summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── Responsive ── */
@media (max-width: 720px) {
  .pg-stepper { grid-template-columns: 1fr; }
  .pg-step-txt em { display: none; }
  .pg-share-btn { margin-left: 0; width: 100%; }
}
@media (max-width: 560px) {
  #playground { padding-top: 5.5rem; }
  .pg-token-grid { grid-template-columns: 1fr; }
  .pg-membar-label { flex-basis: 66px; }
  .pg-membar-val { flex-basis: 76px; }
  .pg-field-chip { flex-basis: 100%; }
  .pg-hero-head { justify-content: flex-start; }
  .pg-cta { flex: 1 1 100%; text-align: center; }
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  #playground *, #playground *::before, #playground *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .pg-panel.active { animation: none; }
  .pg-skel-legend span::after, .pg-skel-chart::after { animation: none; }
}

/* ============================================================
   PLAYGROUND — dashboard patterns
   Additive "developer console" layer over the existing flow.
   Layout/interaction only; every color resolves on the existing
   token system in both themes. Reuses the local #playground
   --pg-shadow / status tokens defined above.
   ============================================================ */

/* Shared inline-SVG icon sizing for band headers / rows. */
#playground .pg-ic {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ── Pattern 1 — Headline stat-card row ── */
.pg-stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(0, 1fr));
  gap: 0.7rem;
  margin: 0.2rem 0 1.15rem;
}
.pg-stat {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  box-shadow: var(--pg-shadow);
  min-width: 0;
}
/* Accent-highlighted variant (e.g. the compressed token count). */
.pg-stat-hi {
  border-color: var(--accent);
  background: rgba(var(--accent-rgb), 0.06);
}
.pg-stat-lbl {
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.2;
}
.pg-stat-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(1.6rem, 5vw, 2.15rem);
  font-weight: 600;
  line-height: 1;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  overflow-wrap: anywhere;
}
.pg-stat-hi .pg-stat-num { color: var(--accent); }
.pg-stat-unit { font-size: 0.8rem; color: var(--muted); }
/* Status card (RESIDENT RAM) — a state, not a number. */
.pg-stat-status { display: inline-flex; align-items: center; gap: 0.45rem; font-size: 1.05rem; font-weight: 600; }
.pg-stat-status.is-ok { color: var(--pg-good); }
.pg-stat-status.is-muted { color: var(--muted); }
.pg-stat-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  flex: 0 0 auto;
}
.pg-stat-status.is-ok .pg-stat-dot { box-shadow: 0 0 0 3px rgba(var(--pg-good-rgb), 0.2); }

/* ── Pattern 2 — Labeled section bands ── */
.pg-band {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.7rem;
  margin: 1.35rem 0 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface) 82%, var(--border));
  color: var(--muted);
}
.pg-band-title {
  font-size: 0.62rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}
.pg-band-body { margin-top: 0.1rem; }
/* First band in a result shouldn't push a big top gap. */
.pg-band:first-child { margin-top: 0.2rem; }

/* ── Pattern 3 — Split-metric card (two-up with divider) ── */
.pg-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--pg-shadow);
}
.pg-split-cell {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.85rem 1rem;
}
.pg-split-cell + .pg-split-cell { border-left: 1px solid var(--border); }
.pg-split .pg-stat-num { font-size: clamp(1.25rem, 4vw, 1.6rem); }

/* ── Pattern 4 — Copyable value rows ── */
.pg-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}
.pg-row:last-child { border-bottom: 0; }
.pg-row-lbl {
  font-size: 0.78rem;
  color: var(--muted);
  flex: 0 0 auto;
}
.pg-row-right { display: flex; align-items: center; gap: 0.5rem; min-width: 0; }
.pg-row-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--code-text);
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.28rem 0.55rem;
  max-width: 100%;
  overflow-x: auto;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.pg-row-copy {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.pg-row-copy:hover { border-color: var(--accent); color: var(--accent); }
.pg-row-copy.copied { border-color: var(--pg-good); color: var(--pg-good); }
/* Copy button swaps its icon on success via the .copied class. */
.pg-row-copy .pg-ic-check { display: none; }
.pg-row-copy.copied .pg-ic-copy { display: none; }
.pg-row-copy.copied .pg-ic-check { display: block; }

/* ── Pattern 5 — Segmented control ── */
.pg-seg {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg);
  max-width: 100%;
}
.pg-seg-btn {
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--muted);
  background: transparent;
  border: 0;
  border-left: 1px solid var(--border);
  padding: 0.5rem 0.85rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}
.pg-seg-btn:first-child { border-left: 0; }
.pg-seg-btn:hover { color: var(--accent); }
.pg-seg-btn.active {
  color: var(--bg);
  background: var(--accent);
  font-weight: 600;
}

/* Focus-visible rings for the new interactive elements. */
#playground .pg-row-copy:focus-visible,
#playground .pg-seg-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── Responsive (dashboard patterns) ── */
@media (max-width: 520px) {
  .pg-split { grid-template-columns: 1fr; }
  .pg-split-cell + .pg-split-cell { border-left: 0; border-top: 1px solid var(--border); }
  .pg-seg { display: flex; width: 100%; }
  .pg-seg-btn { flex: 1; text-align: center; padding: 0.5rem 0.4rem; }
  .pg-row { flex-wrap: wrap; align-items: flex-start; }
  .pg-row-val { overflow-x: auto; }
}