/* ============================================================
   Plumb — Component & layout styles
   shadcn-flavored React components use these classes
   ============================================================ */

/* — Utility helpers ——————————————————————————— */
.r-stack { display: flex; flex-direction: column; }
.r-row   { display: flex; flex-direction: row; }
.r-center { align-items: center; }
.r-between { justify-content: space-between; }
.r-grow { flex: 1; min-width: 0; }
.r-wrap { flex-wrap: wrap; }

/* gap utilities */
.gap-1{gap:var(--space-1)} .gap-2{gap:var(--space-2)} .gap-3{gap:var(--space-3)}
.gap-4{gap:var(--space-4)} .gap-5{gap:var(--space-5)} .gap-6{gap:var(--space-6)}
.gap-8{gap:var(--space-8)} .gap-10{gap:var(--space-10)} .gap-12{gap:var(--space-12)}

/* — Type utilities ———————————————————————————— */
.h-display { font-size: var(--text-6xl); line-height: var(--leading-tight); letter-spacing: -0.035em; font-weight: 600; margin: 0; }
.h-1 { font-size: var(--text-5xl); line-height: var(--leading-tight); letter-spacing: var(--tracking-tight); font-weight: 600; margin: 0; }
.h-2 { font-size: var(--text-3xl); line-height: var(--leading-snug); letter-spacing: var(--tracking-tight); font-weight: 600; margin: 0; }
.h-3 { font-size: var(--text-xl); line-height: var(--leading-snug); letter-spacing: var(--tracking-snug); font-weight: 600; margin: 0; }
.h-4 { font-size: var(--text-md); line-height: var(--leading-snug); font-weight: 600; margin: 0; }

.text-body  { font-size: var(--text-base); line-height: var(--leading-normal); margin: 0; }
.text-small { font-size: var(--text-sm); line-height: var(--leading-normal); margin: 0; }
.text-xs    { font-size: var(--text-xs); line-height: var(--leading-normal); margin: 0; }

.text-muted { color: hsl(var(--fg-muted)); }
.text-subtle{ color: hsl(var(--fg-subtle)); }
.text-fg    { color: hsl(var(--fg)); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: hsl(var(--primary));
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: "";
  width: 18px; height: 1px; background: hsl(var(--primary));
}
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ============================================================
   Button
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-weight: var(--weight-medium);
  font-size: var(--text-sm);
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.btn:focus-visible { outline: 2px solid hsl(var(--ring) / .55); outline-offset: 2px; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; pointer-events: none; }

/* sizes (driven by density) */
.btn-sm { height: var(--control-h-sm); padding: 0 var(--control-px-sm); font-size: var(--text-xs); }
.btn-md { height: var(--control-h-md); padding: 0 var(--control-px-md); }
.btn-lg { height: var(--control-h-lg); padding: 0 var(--control-px-lg); font-size: var(--text-base); }
.btn-icon { width: var(--control-h-md); padding: 0; }
.btn-icon.btn-sm { width: var(--control-h-sm); }
.btn-icon.btn-lg { width: var(--control-h-lg); }

/* variants */
.btn-primary {
  background: hsl(var(--primary));
  color: hsl(var(--primary-fg));
  border-color: hsl(var(--primary) / .8);
  box-shadow: inset 0 -1px 0 hsl(0 0% 0% / .15);
}
.btn-primary:hover { background: hsl(var(--primary-hover)); }

.btn-secondary {
  background: hsl(var(--bg-elevated));
  color: hsl(var(--fg));
  border-color: hsl(var(--border));
}
.btn-secondary:hover { background: hsl(var(--muted)); border-color: hsl(var(--border-strong)); }

.btn-outline {
  background: transparent;
  color: hsl(var(--fg));
  border-color: hsl(var(--border-strong));
}
.btn-outline:hover { background: hsl(var(--muted)); }

.btn-ghost {
  background: transparent;
  color: hsl(var(--fg));
}
.btn-ghost:hover { background: hsl(var(--muted)); }

.btn-link {
  background: transparent;
  color: hsl(var(--info));
  height: auto !important;
  padding: 0;
  border-radius: 0;
}
.btn-link:hover { text-decoration: underline; }

.btn-destructive {
  background: hsl(var(--destructive));
  color: hsl(var(--destructive-fg));
  border-color: hsl(var(--destructive) / .8);
}
.btn-destructive:hover { background: hsl(var(--destructive) / .92); }

.btn-ink {
  background: hsl(var(--bg-inverse));
  color: hsl(var(--fg-inverse));
  border-color: hsl(var(--bg-inverse));
}
.btn-ink:hover { background: hsl(var(--bg-inverse) / .88); }

/* ============================================================
   Input / Textarea / Select
   ============================================================ */
.input, .textarea, .select-trigger {
  width: 100%;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: hsl(var(--fg));
  background: hsl(var(--bg-elevated));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-md);
  padding: 0 var(--control-px-md);
  height: var(--control-h-md);
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast), background-color var(--dur-fast);
  outline: none;
}
.input::placeholder, .textarea::placeholder { color: hsl(var(--fg-subtle)); }
.textarea { height: auto; padding: 10px var(--control-px-md); resize: vertical; line-height: var(--leading-normal); }

.input:hover, .textarea:hover, .select-trigger:hover { border-color: hsl(var(--border-strong)); }
.input:focus, .textarea:focus, .select-trigger:focus, .select-trigger.is-open {
  border-color: hsl(var(--ring));
  box-shadow: 0 0 0 3px hsl(var(--ring) / .18);
}
.input:disabled, .textarea:disabled { background: hsl(var(--muted)); color: hsl(var(--fg-subtle)); cursor: not-allowed; }
.input.is-error, .textarea.is-error { border-color: hsl(var(--destructive)); }
.input.is-error:focus, .textarea.is-error:focus { box-shadow: 0 0 0 3px hsl(var(--destructive) / .2); }

/* leading/trailing slots */
.input-group { position: relative; display: flex; align-items: center; }
.input-group .input { padding-left: 36px; }
.input-group > .lead {
  position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
  color: hsl(var(--fg-subtle)); pointer-events: none; display: flex;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: hsl(var(--fg));
}
.field-help { font-size: var(--text-xs); color: hsl(var(--fg-subtle)); }
.field-error { font-size: var(--text-xs); color: hsl(var(--destructive)); display: flex; align-items: center; gap: 6px; }

/* select */
.select-trigger {
  display: inline-flex; align-items: center; justify-content: space-between;
  cursor: pointer; padding-right: 10px;
}
.select-trigger > .chev { color: hsl(var(--fg-subtle)); flex-shrink: 0; }

/* checkbox */
.cb {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: var(--text-sm); cursor: pointer; user-select: none;
}
.cb input { display: none; }
.cb .box {
  width: 16px; height: 16px;
  border: 1.5px solid hsl(var(--border-strong));
  border-radius: var(--radius-sm);
  background: hsl(var(--bg-elevated));
  display: grid; place-items: center;
  transition: all var(--dur-fast);
}
.cb input:checked + .box {
  background: hsl(var(--primary)); border-color: hsl(var(--primary));
}
.cb input:checked + .box::after {
  content: ""; width: 9px; height: 5px;
  border-left: 2px solid hsl(var(--primary-fg));
  border-bottom: 2px solid hsl(var(--primary-fg));
  transform: translateY(-1px) rotate(-45deg);
}

/* radio */
.rd {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: var(--text-sm); cursor: pointer; user-select: none;
}
.rd input { display: none; }
.rd .box {
  width: 16px; height: 16px; border-radius: 50%;
  border: 1.5px solid hsl(var(--border-strong));
  background: hsl(var(--bg-elevated));
  display: grid; place-items: center;
  transition: all var(--dur-fast);
}
.rd input:checked + .box { border-color: hsl(var(--primary)); }
.rd input:checked + .box::after {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: hsl(var(--primary));
}

/* switch */
.sw {
  position: relative; width: 32px; height: 18px;
  background: hsl(var(--border-strong));
  border-radius: 999px; cursor: pointer; flex-shrink: 0;
  transition: background-color var(--dur-fast);
}
.sw input { display: none; }
.sw::after {
  content: ""; position: absolute;
  top: 2px; left: 2px; width: 14px; height: 14px;
  background: hsl(var(--bg-elevated));
  border-radius: 50%;
  transition: transform var(--dur-fast);
  box-shadow: 0 1px 2px hsl(0 0% 0% / .2);
}
.sw.is-on { background: hsl(var(--primary)); }
.sw.is-on::after { transform: translateX(14px); }

/* segmented control */
.seg {
  display: inline-flex;
  background: hsl(var(--muted));
  border: 1px solid hsl(var(--border));
  padding: 3px;
  border-radius: var(--radius-md);
}
.seg button {
  border: 0; background: transparent;
  font: var(--weight-medium) var(--text-xs)/1 var(--font-sans);
  padding: 6px 10px;
  border-radius: calc(var(--radius-md) - 2px);
  color: hsl(var(--fg-muted));
  cursor: pointer;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.seg button[aria-pressed="true"] {
  background: hsl(var(--bg-elevated));
  color: hsl(var(--fg));
  box-shadow: var(--shadow-sm);
}

/* slider */
.range {
  appearance: none; -webkit-appearance: none;
  width: 100%; height: 4px; border-radius: 999px;
  background: hsl(var(--border));
  outline: none;
}
.range::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; border-radius: 50%;
  background: hsl(var(--primary));
  border: 2px solid hsl(var(--bg-elevated));
  box-shadow: var(--shadow-sm); cursor: pointer;
}
.range::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: hsl(var(--primary));
  border: 2px solid hsl(var(--bg-elevated));
  box-shadow: var(--shadow-sm); cursor: pointer; border: 0;
}

/* ============================================================
   Card
   ============================================================ */
.card {
  background: hsl(var(--bg-elevated));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.card-pad-sm { padding: var(--space-4); }
.card-pad-md { padding: var(--space-6); }
.card-pad-lg { padding: var(--space-8); }
.card-header { padding: var(--space-6) var(--space-6) var(--space-2); }
.card-body   { padding: var(--space-4) var(--space-6) var(--space-6); }
.card-footer { padding: var(--space-4) var(--space-6); background: hsl(var(--muted) / .5); border-top: 1px solid hsl(var(--border)); }
.card-title  { font-size: var(--text-lg); font-weight: 600; line-height: var(--leading-snug); letter-spacing: var(--tracking-snug); margin: 0; }
.card-desc   { font-size: var(--text-sm); color: hsl(var(--fg-muted)); margin: 6px 0 0; }

/* ============================================================
   Badge
   ============================================================ */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11px; font-weight: var(--weight-medium);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  line-height: 1.4;
}
.badge.dot::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor;
}
.badge-neutral  { background: hsl(var(--muted));            color: hsl(var(--fg)); border-color: hsl(var(--border)); }
.badge-primary  { background: hsl(var(--primary) / .12);   color: hsl(var(--primary)); border-color: hsl(var(--primary) / .25); }
.badge-success  { background: hsl(var(--success) / .14);   color: hsl(var(--success)); border-color: hsl(var(--success) / .3); }
.badge-warning  { background: hsl(var(--warning) / .15);   color: hsl(var(--warning)); border-color: hsl(var(--warning) / .3); }
.badge-danger   { background: hsl(var(--destructive) / .14); color: hsl(var(--destructive)); border-color: hsl(var(--destructive) / .3); }
.badge-info     { background: hsl(var(--info) / .14);      color: hsl(var(--info)); border-color: hsl(var(--info) / .3); }
.badge-ink      { background: hsl(var(--bg-inverse));       color: hsl(var(--primary)); }

/* chip */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: hsl(var(--muted));
  border: 1px solid hsl(var(--border));
  padding: 4px 10px 4px 8px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: hsl(var(--fg));
}
.chip .x { color: hsl(var(--fg-subtle)); cursor: pointer; padding: 0 2px; line-height: 1; }
.chip .x:hover { color: hsl(var(--fg)); }

/* ============================================================
   Tabs
   ============================================================ */
.tabs { display: flex; flex-direction: column; gap: var(--space-4); }
.tabs-list {
  display: inline-flex;
  border-bottom: 1px solid hsl(var(--border));
  gap: 0;
}
.tabs-trigger {
  background: transparent; border: 0; cursor: pointer;
  padding: 10px 14px;
  font: var(--weight-medium) var(--text-sm)/1 var(--font-sans);
  color: hsl(var(--fg-muted));
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.tabs-trigger:hover { color: hsl(var(--fg)); }
.tabs-trigger[aria-selected="true"] {
  color: hsl(var(--fg));
  border-bottom-color: hsl(var(--primary));
}

/* ============================================================
   Table
   ============================================================ */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.table th, .table td {
  padding: 12px 14px;
  border-bottom: 1px solid hsl(var(--hairline));
  text-align: left;
}
.table thead th {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: var(--tracking-wider); text-transform: uppercase;
  color: hsl(var(--fg-muted));
  background: hsl(var(--muted) / .4);
  border-bottom: 1px solid hsl(var(--border));
}
.table td.num { font-family: var(--font-mono); text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.table tr.best td { background: hsl(var(--primary) / .07); }
.table tr.best td:first-child { box-shadow: inset 3px 0 0 hsl(var(--primary)); }
.table tr:hover td { background: hsl(var(--muted) / .35); }
.table tr.best:hover td { background: hsl(var(--primary) / .1); }

/* ============================================================
   Toast / Tooltip / Skeleton / Avatar
   ============================================================ */
.toast {
  background: hsl(var(--bg-inverse));
  color: hsl(var(--fg-inverse));
  padding: 12px 16px;
  border-radius: var(--radius-xl);
  display: flex; align-items: center; gap: 12px;
  box-shadow: var(--shadow-xl);
  font-size: var(--text-sm);
  max-width: 380px;
}
.toast .toast-ic { width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; flex-shrink: 0; }

.tooltip {
  display: inline-block;
  background: hsl(var(--bg-inverse));
  color: hsl(var(--fg-inverse));
  font-size: var(--text-xs);
  padding: 6px 10px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  position: relative;
}
.tooltip::after {
  content: ""; position: absolute;
  bottom: -4px; left: 50%; transform: translateX(-50%) rotate(45deg);
  width: 8px; height: 8px;
  background: hsl(var(--bg-inverse));
}

.avatar {
  border-radius: 50%;
  background: hsl(var(--muted));
  color: hsl(var(--fg));
  display: inline-grid; place-items: center;
  font: var(--weight-semibold) var(--text-xs)/1 var(--font-mono);
  width: 32px; height: 32px;
  overflow: hidden;
}
.avatar.sq { border-radius: var(--radius-md); }
.avatar.ai { background: hsl(var(--bg-inverse)); color: hsl(var(--primary)); }

@keyframes shimmer { 0% { background-position: -200% 0 } 100% { background-position: 200% 0 } }
.skeleton {
  background: linear-gradient(90deg, hsl(var(--muted)) 0%, hsl(var(--muted) / .5) 50%, hsl(var(--muted)) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.6s linear infinite;
  border-radius: var(--radius-md);
}

/* ============================================================
   Dropdown / Modal
   ============================================================ */
.dropdown {
  background: hsl(var(--bg-elevated));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 4px;
  min-width: 200px;
}
.dropdown-item {
  display: flex; align-items: center; gap: 10px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: hsl(var(--fg));
  cursor: pointer;
}
.dropdown-item:hover { background: hsl(var(--muted)); }
.dropdown-sep { height: 1px; background: hsl(var(--border)); margin: 4px -4px; }
.dropdown-label { font-size: 11px; color: hsl(var(--fg-subtle)); padding: 8px 10px 4px; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: var(--tracking-wider); }

.modal-overlay {
  position: fixed; inset: 0;
  background: hsl(var(--bg-inverse) / .55);
  backdrop-filter: blur(4px);
  display: grid; place-items: center;
  z-index: 100;
  padding: 24px;
}
.modal {
  background: hsl(var(--bg-elevated));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  width: 100%; max-width: 460px;
  overflow: hidden;
  animation: pop var(--dur-med) var(--ease-out);
}
@keyframes pop {
  from { opacity: 0; transform: translateY(8px) scale(.98); }
  to { opacity: 1; transform: none; }
}

/* progress / usage bar */
.usage {
  height: 6px;
  background: hsl(var(--border));
  border-radius: 999px;
  overflow: hidden;
}
.usage > i {
  display: block; height: 100%;
  background: hsl(var(--primary));
  border-radius: 999px;
  transition: width var(--dur-med) var(--ease-out);
}

/* kbd */
.kbd {
  font: 500 11px/1 var(--font-mono);
  padding: 3px 6px;
  background: hsl(var(--muted));
  border: 1px solid hsl(var(--border));
  border-bottom-width: 2px;
  border-radius: var(--radius-sm);
  color: hsl(var(--fg-muted));
}

/* ============================================================
   Prototype shell (router, navigation, layout)
   ============================================================ */
.app {
  min-height: 100vh;
  display: flex; flex-direction: column;
}

.app-top {
  position: sticky; top: 0;
  z-index: 40;
  background: hsl(var(--bg) / .85);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid hsl(var(--border));
}
.app-top-inner {
  max-width: 1480px; margin: 0 auto;
  padding: 12px 24px;
  display: flex; align-items: center; gap: 24px;
}
.app-brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600; letter-spacing: -0.01em;
  font-size: var(--text-base);
}
.app-brand .glyph {
  width: 28px; height: 28px;
  background: hsl(var(--bg-inverse));
  color: hsl(var(--primary));
  border-radius: var(--radius-md);
  display: grid; place-items: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
}
.app-brand .accent { color: hsl(var(--primary)); }
.app-nav {
  display: flex; align-items: center; gap: 2px;
  margin-left: 12px;
}
.app-nav button {
  background: transparent;
  border: 0;
  font: 500 var(--text-sm)/1 var(--font-sans);
  color: hsl(var(--fg-muted));
  padding: 7px 10px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.app-nav button:hover { color: hsl(var(--fg)); background: hsl(var(--muted)); }
.app-nav button.active { color: hsl(var(--fg)); background: hsl(var(--muted)); }

.app-top-right { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.version-pill {
  font: 500 11px/1 var(--font-mono);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  background: hsl(var(--muted));
  color: hsl(var(--fg-muted));
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
}

.app-main {
  max-width: 1480px;
  margin: 0 auto;
  padding: 40px 24px 120px;
  width: 100%;
}

/* sections inside routes */
.section { margin-bottom: 80px; }
.section-head { margin-bottom: 32px; max-width: 64ch; }
.section-head h2 { margin: 8px 0 6px; }

.subsection { margin-bottom: 48px; }
.subsection-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
  gap: 16px;
}
.subsection-title {
  font-size: var(--text-md);
  font-weight: 600;
  margin: 0;
}
.subsection-sub {
  font-size: var(--text-sm);
  color: hsl(var(--fg-muted));
  margin: 2px 0 0;
  max-width: 80ch;
}

.divider { height: 1px; background: hsl(var(--border)); margin: 56px 0; }

/* spec rows (token tables) */
.spec {
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: hsl(var(--bg-elevated));
}
.spec-row {
  display: grid;
  grid-template-columns: 180px 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  font-size: var(--text-sm);
  border-top: 1px solid hsl(var(--hairline));
}
.spec-row:first-child { border-top: 0; }
.spec-row .k { font-family: var(--font-mono); font-size: var(--text-xs); color: hsl(var(--fg-muted)); }
.spec-row .v { color: hsl(var(--fg)); }
.spec-row .vis { display: flex; align-items: center; gap: 8px; }

/* device frames for desktop+mobile side-by-side */
.platform-pair {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 24px;
  align-items: stretch;
}
@media (max-width: 1100px) {
  .platform-pair { grid-template-columns: 1fr; }
}
.frame {
  background: hsl(var(--bg-elevated));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-2xl);
  overflow: hidden;
  position: relative;
}
.frame-head {
  padding: 8px 12px;
  background: hsl(var(--muted) / .5);
  border-bottom: 1px solid hsl(var(--border));
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: hsl(var(--fg-muted));
}
.frame-head .dots { display: flex; gap: 4px; }
.frame-head .dots i { width: 8px; height: 8px; border-radius: 50%; background: hsl(var(--border-strong)); display: block; }
.frame-body {
  position: relative;
  background: hsl(var(--bg));
  min-height: 360px;
}
.frame.mobile { max-width: 360px; margin: 0 auto; }
.frame.mobile .frame-body { min-height: 640px; }

/* color swatches */
.swatch-row {
  display: grid; gap: 4px;
  grid-template-columns: repeat(11, 1fr);
}
.swatch {
  aspect-ratio: 1.4 / 1;
  border-radius: var(--radius-md);
  padding: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  display: flex; flex-direction: column; justify-content: space-between;
  border: 1px solid hsl(0 0% 0% / .08);
}

/* icon grid */
.icon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
  gap: 8px;
}
.icon-cell {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  padding: 16px 8px;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-md);
  background: hsl(var(--bg-elevated));
  font-family: var(--font-mono);
  font-size: 10px;
  color: hsl(var(--fg-muted));
}
.icon-cell svg { width: 22px; height: 22px; color: hsl(var(--fg)); }

/* hero (foundations) */
.hero {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  padding: 24px 0 56px;
  border-bottom: 1px solid hsl(var(--border));
  margin-bottom: 64px;
}
.hero-title {
  font-size: clamp(40px, 5vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-weight: 600;
  margin: 24px 0 0;
}
.hero-title em {
  font-style: normal;
  color: hsl(var(--primary));
}
.hero-blurb {
  margin-top: 28px;
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: hsl(var(--fg-muted));
  max-width: 56ch;
}
.hero-meta {
  margin-top: 24px;
  display: flex; flex-wrap: wrap; gap: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: hsl(var(--fg-subtle));
}
.hero-mark {
  background: hsl(var(--bg-inverse));
  color: hsl(var(--fg-inverse));
  border-radius: var(--radius-2xl);
  padding: 28px;
  display: flex; flex-direction: column; justify-content: space-between;
  min-height: 320px;
  position: relative;
  overflow: hidden;
}
.hero-mark::before {
  content: "";
  position: absolute; inset: -30% -10% auto auto;
  width: 340px; height: 340px;
  background: radial-gradient(circle at 50% 50%, hsl(var(--primary)), transparent 60%);
  opacity: 0.32;
  pointer-events: none;
}
.hero-mark .big {
  font-size: 200px; line-height: 0.85; font-weight: 600;
  letter-spacing: -0.06em;
  color: hsl(var(--primary));
  margin: -10px 0 0 -6px;
  position: relative;
}
.hero-mark .foot {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: hsl(var(--fg-inverse) / .6);
  position: relative;
}

/* principles cards */
.princ-card {
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-lg);
  padding: 20px;
  background: hsl(var(--bg-elevated));
}
.princ-card .ix {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: hsl(var(--primary));
}
.princ-card h4 { margin: 10px 0 6px; font-size: var(--text-md); font-weight: 600; }
.princ-card p { margin: 0; font-size: var(--text-sm); color: hsl(var(--fg-muted)); line-height: var(--leading-normal); }

/* type ramp rows */
.type-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  padding: 18px 0;
  border-top: 1px solid hsl(var(--hairline));
  align-items: baseline;
  gap: 24px;
}
.type-row:first-child { border-top: 0; }
.type-row .meta {
  font: 500 11px/1.4 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: hsl(var(--fg-subtle));
}
.type-row .meta strong { display: block; color: hsl(var(--fg-muted)); font-weight: 600; margin-bottom: 4px; }

/* responsive */
@media (max-width: 800px) {
  .hero { grid-template-columns: 1fr; }
  .swatch-row { grid-template-columns: repeat(6, 1fr); }
  .type-row { grid-template-columns: 1fr; }
  .spec-row { grid-template-columns: 100px 1fr; }
  .spec-row .vis { grid-column: 1 / -1; }
  .app-main { padding: 24px 16px 80px; }
  .app-top-inner { padding: 12px 16px; gap: 12px; }
  .app-nav { overflow-x: auto; flex-wrap: nowrap; }
  .app-nav button { white-space: nowrap; }
}