/* ==========================================================================
   VRAMLab (vram.codeap.com) — Swiss Precision Silicon & GPU Ledger Design System
   Applied modern-web-guidance IDs:
   responsive-table, slider, accordion, tabs, copy-button, forms, html, brand-consistent-forms
   ========================================================================== */

@property --fade-start {
  syntax: "<length>";
  inherits: false;
  initial-value: 0px;
}

@property --fade-end {
  syntax: "<length>";
  inherits: false;
  initial-value: 0px;
}

:root {
  /* Light mode tokens — Technical Drafting Paper & Emerald Silicon (#047857) */
  --bg-light: #f4f6f4;
  --surface-light: #ffffff;
  --surface-well-light: #ebefec;
  --border-light: #cdd5d0;
  --control-border-light: #68756e;
  --border-strong-light: #0f1714;
  --ink-light: #0f1714;
  --ink-muted-light: #495650;
  --accent-light: #047857;
  --accent-soft-light: #d1fae5;
  --accent-contrast-light: #ffffff;
  --positive-light: #047857;
  --warning-light: #b45309;
  --danger-light: #b91c1c;
  --kv-bar-light: #0369a1;
  --ovh-bar-light: #b45309;
  --scroll-track-light: #ebefec;
  --scroll-thumb-light: #9ca9a2;

  /* Dark mode tokens — Deep Silicon Carbon & Emerald Phosphor (#34d399) */
  --bg-dark: #0a0d0c;
  --surface-dark: #111614;
  --surface-well-dark: #171f1c;
  --border-dark: #25312c;
  --control-border-dark: #607069;
  --border-strong-dark: #e6eeeb;
  --ink-dark: #ecf2ef;
  --ink-muted-dark: #94a39c;
  --accent-dark: #34d399;
  --accent-soft-dark: #064e3b;
  --accent-contrast-dark: #052016;
  --positive-dark: #34d399;
  --warning-dark: #fbbf24;
  --danger-dark: #f87171;
  --kv-bar-dark: #38bdf8;
  --ovh-bar-dark: #fbbf24;
  --scroll-track-dark: #111614;
  --scroll-thumb-dark: #3a4741;

  --bg: var(--bg-light);
  --surface: var(--surface-light);
  --surface-well: var(--surface-well-light);
  --border: var(--border-light);
  --control-border: var(--control-border-light);
  --border-strong: var(--border-strong-light);
  --ink: var(--ink-light);
  --ink-muted: var(--ink-muted-light);
  --accent: var(--accent-light);
  --accent-soft: var(--accent-soft-light);
  --accent-contrast: var(--accent-contrast-light);
  --positive: var(--positive-light);
  --warning: var(--warning-light);
  --danger: var(--danger-light);
  --kv-bar: var(--kv-bar-light);
  --ovh-bar: var(--ovh-bar-light);
  --scrollbar-track: var(--scroll-track-light);
  --scrollbar-thumb: var(--scroll-thumb-light);

  --radius-sm: 2px;
  --radius-md: 4px;

  --font-sans: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  color-scheme: light dark;
  accent-color: var(--accent);
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);

  &:has(> head > meta[name="color-scheme"][content="dark"]) {
    color-scheme: dark;
  }
  &:has(> head > meta[name="color-scheme"][content="light"]) {
    color-scheme: light;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--bg-dark);
    --surface: var(--surface-dark);
    --surface-well: var(--surface-well-dark);
    --border: var(--border-dark);
    --control-border: var(--control-border-dark);
    --border-strong: var(--border-strong-dark);
    --ink: var(--ink-dark);
    --ink-muted: var(--ink-muted-dark);
    --accent: var(--accent-dark);
    --accent-soft: var(--accent-soft-dark);
    --accent-contrast: var(--accent-contrast-dark);
    --positive: var(--positive-dark);
    --warning: var(--warning-dark);
    --danger: var(--danger-dark);
    --kv-bar: var(--kv-bar-dark);
    --ovh-bar: var(--ovh-bar-dark);
    --scrollbar-track: var(--scroll-track-dark);
    --scrollbar-thumb: var(--scroll-thumb-dark);
  }
}

@supports (color: light-dark(white, black)) {
  :root {
    --bg: light-dark(var(--bg-light), var(--bg-dark));
    --surface: light-dark(var(--surface-light), var(--surface-dark));
    --surface-well: light-dark(var(--surface-well-light), var(--surface-well-dark));
    --border: light-dark(var(--border-light), var(--border-dark));
    --control-border: light-dark(var(--control-border-light), var(--control-border-dark));
    --border-strong: light-dark(var(--border-strong-light), var(--border-strong-dark));
    --ink: light-dark(var(--ink-light), var(--ink-dark));
    --ink-muted: light-dark(var(--ink-muted-light), var(--ink-muted-dark));
    --accent: light-dark(var(--accent-light), var(--accent-dark));
    --accent-soft: light-dark(var(--accent-soft-light), var(--accent-soft-dark));
    --accent-contrast: light-dark(var(--accent-contrast-light), var(--accent-contrast-dark));
    --positive: light-dark(var(--positive-light), var(--positive-dark));
    --warning: light-dark(var(--warning-light), var(--warning-dark));
    --danger: light-dark(var(--danger-light), var(--danger-dark));
    --kv-bar: light-dark(var(--kv-bar-light), var(--kv-bar-dark));
    --ovh-bar: light-dark(var(--ovh-bar-light), var(--ovh-bar-dark));
    --scrollbar-track: light-dark(var(--scroll-track-light), var(--scroll-track-dark));
    --scrollbar-thumb: light-dark(var(--scroll-thumb-light), var(--scroll-thumb-dark));
  }
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: var(--bg-dark);
  --surface: var(--surface-dark);
  --surface-well: var(--surface-well-dark);
  --border: var(--border-dark);
  --control-border: var(--control-border-dark);
  --border-strong: var(--border-strong-dark);
  --ink: var(--ink-dark);
  --ink-muted: var(--ink-muted-dark);
  --accent: var(--accent-dark);
  --accent-soft: var(--accent-soft-dark);
  --accent-contrast: var(--accent-contrast-dark);
  --positive: var(--positive-dark);
  --warning: var(--warning-dark);
  --danger: var(--danger-dark);
  --kv-bar: var(--kv-bar-dark);
  --ovh-bar: var(--ovh-bar-dark);
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: var(--bg-light);
  --surface: var(--surface-light);
  --surface-well: var(--surface-well-light);
  --border: var(--border-light);
  --control-border: var(--control-border-light);
  --border-strong: var(--border-strong-light);
  --ink: var(--ink-light);
  --ink-muted: var(--ink-muted-light);
  --accent: var(--accent-light);
  --accent-soft: var(--accent-soft-light);
  --accent-contrast: var(--accent-contrast-light);
  --positive: var(--positive-light);
  --warning: var(--warning-light);
  --danger: var(--danger-light);
  --kv-bar: var(--kv-bar-light);
  --ovh-bar: var(--ovh-bar-light);
}

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

body {
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  accent-color: var(--accent);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 3px;
  transition: color 0.12s ease, text-decoration-color 0.12s ease;
}

a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

a:focus-visible,
button:focus-visible,
select:focus-visible,
input:focus-visible,
textarea:focus-visible,
summary:focus-visible,
[tabindex="0"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  clip-path: inset(50%);
  overflow: hidden;
  inline-size: 1px;
  block-size: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  white-space: nowrap;
}

.wrap {
  max-inline-size: 1260px;
  margin-inline: auto;
  padding-inline: 24px;
}

@media (max-width: 640px) {
  .wrap {
    padding-inline: 16px;
  }
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
header.site-header {
  background-color: var(--surface);
  border-block-end: 1px solid var(--border);
  position: sticky;
  inset-block-start: 0;
  z-index: 40;
}

.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-block-size: 58px;
  gap: 14px;
  flex-wrap: wrap;
  padding-block: 8px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-mark:hover {
  color: var(--ink);
}

.studio-mark-svg {
  flex-shrink: 0;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px 12px;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--ink-muted);
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  border-block-end: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--ink);
  border-block-end-color: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* ==========================================================================
   Breadcrumbs, Masthead & Typography
   ========================================================================== */
.breadcrumb-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-block-start: 18px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.breadcrumb-nav a {
  color: var(--ink-muted);
}

.page-masthead {
  padding-block: 28px 22px;
  border-block-end: 1px solid var(--border);
  margin-block-end: 24px;
}

.page-masthead h1 {
  font-size: clamp(1.65rem, 2.8vw, 2.35rem);
  line-height: 1.18;
  letter-spacing: -0.025em;
  margin-block-end: 10px;
}

.masthead-lead {
  font-size: 1.02rem;
  color: var(--ink-muted);
  max-inline-size: 78ch;
}

.stat-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-block-start: 14px;
  list-style: none;
}

.stat-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.stat-dot {
  inline-size: 7px;
  block-size: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.section-block {
  margin-block: 32px;
}

.section-block h2 {
  font-size: 1.32rem;
  letter-spacing: -0.015em;
  margin-block-end: 12px;
}

.section-block h3 {
  font-size: 1.04rem;
  margin-block-end: 8px;
}

.prose p {
  margin-block-end: 12px;
  max-inline-size: 82ch;
}

code.inline,
code:not(pre > code) {
  font-family: var(--font-mono);
  font-size: 0.86em;
  padding: 0.12em 0.38em;
  background: var(--surface-well);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Buttons & Action Bars
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  min-block-size: 40px;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-contrast);
  text-decoration: none;
  cursor: pointer;
  transition: opacity 0.12s ease, background-color 0.12s ease;
}

.btn:hover {
  opacity: 0.92;
  color: var(--accent-contrast);
}

.btn-quiet {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--control-border);
}

.btn-quiet:hover {
  border-color: var(--accent);
  color: var(--accent);
  opacity: 1;
}

.theme-btn {
  min-block-size: 34px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-block-start: 14px;
}

/* ==========================================================================
   Workbench Layout & Modern Forms (`forms`, `brand-consistent-forms`)
   ========================================================================== */
.workbench-frame {
  background: var(--surface);
  border: 1px solid var(--border);
  border-block-start: 3px solid var(--accent);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.workbench-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
}

@media (max-width: 960px) {
  .workbench-grid {
    grid-template-columns: 1fr;
  }
}

.workbench-controls {
  padding: 22px;
  border-inline-end: 1px solid var(--border);
  background: var(--surface);
}

@media (max-width: 960px) {
  .workbench-controls {
    border-inline-end: 0;
    border-block-end: 1px solid var(--border);
  }
}

.workbench-results {
  padding: 22px;
  background: var(--surface-well);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

@media (max-width: 640px) {
  .field-grid-2,
  .field-grid-3 {
    grid-template-columns: 1fr;
  }
}

/* Gestalt proximity: tight gap inside .field, larger margin between groups */
.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-block-end: 1rem;
}

.field-label-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.field label,
.field-label {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--ink);
}

.field output,
.slider-readout {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

input:not([type="range"]):not([type="checkbox"]):not([type="radio"]):not([type="file"]),
select,
textarea {
  font: inherit;
  font-size: max(1rem, 1em);
  line-height: 1.4;
  min-block-size: 48px;
  inline-size: 100%;
  padding: 0.6rem 0.75rem;
  color: var(--ink);
  background-color: var(--surface);
  border: 1px solid var(--control-border);
  border-radius: var(--radius-md);
}

textarea {
  min-block-size: 132px;
  font-family: var(--font-mono);
  font-size: max(1rem, 0.9rem);
  resize: vertical;
}

input[type="file"] {
  font: inherit;
  font-size: 0.92rem;
  inline-size: 100%;
  min-block-size: 48px;
  padding: 0.55rem;
  border: 1px dashed var(--control-border);
  border-radius: var(--radius-md);
  background: var(--surface-well);
  cursor: pointer;
}

@media (pointer: coarse) {
  input:not([type="range"]):not([type="checkbox"]):not([type="radio"]),
  select {
    min-block-size: 52px;
  }
}

input:user-invalid,
select:user-invalid,
textarea:user-invalid {
  border-color: var(--danger);
}

@supports not (accent-color: #047857) {
  input[type="checkbox"],
  input[type="radio"] {
    border: 2px solid var(--control-border);
  }
}

/* ==========================================================================
   Brand-Consistent Range Slider (`slider`)
   ========================================================================== */
input[type="range"] {
  --slider-track-size: 0.5rem;
  --slider-thumb-size: 1.25rem;
  --slider-track-radius: 999px;
  --slider-thumb-radius: 50%;
  --slider-track-color: var(--border);
  --slider-fill-color: var(--accent);
  --slider-thumb-color: var(--slider-fill-color);
  --slider-direction: to right;

  &:dir(rtl) {
    --slider-direction: to left;
  }

  --attr-min: attr(min type(<number>), 0);
  --attr-max: attr(max type(<number>), 100);
  --control-value: attr(value type(<number>), 50);
  --slider-progress: calc(
    progress(var(--control-value), var(--attr-min), var(--attr-max)) * 100%
  );

  appearance: none;
  inline-size: 100%;
  block-size: 2.5rem;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  cursor: pointer;
}

@supports not (opacity: progress(1, 0, 100)) {
  input[type="range"] {
    --slider-progress: calc(
      (var(--control-value) - var(--attr-min)) /
      (var(--attr-max) - var(--attr-min)) * 100%
    );
  }
}

input[type="range"]::-webkit-slider-runnable-track {
  block-size: var(--slider-track-size);
  border: 0;
  border-radius: var(--slider-track-radius);
  background: linear-gradient(
    var(--slider-direction),
    var(--slider-fill-color) var(--slider-progress),
    var(--slider-track-color) var(--slider-progress)
  );
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  inline-size: var(--slider-thumb-size);
  block-size: var(--slider-thumb-size);
  margin-block-start: calc(
    (var(--slider-track-size) - var(--slider-thumb-size)) / 2
  );
  border: 2px solid var(--surface);
  border-radius: var(--slider-thumb-radius);
  background: var(--slider-thumb-color);
}

input[type="range"]::-moz-range-track {
  block-size: var(--slider-track-size);
  border: 0;
  border-radius: var(--slider-track-radius);
  background: var(--slider-track-color);
}

input[type="range"]::-moz-range-progress {
  block-size: var(--slider-track-size);
  border-radius: var(--slider-track-radius);
  background: var(--slider-fill-color);
}

input[type="range"]::-moz-range-thumb {
  inline-size: var(--slider-thumb-size);
  block-size: var(--slider-thumb-size);
  border: 2px solid var(--surface);
  border-radius: var(--slider-thumb-radius);
  background: var(--slider-thumb-color);
}

input[type="range"]:focus-visible {
  outline: 2px solid var(--slider-fill-color);
  outline-offset: 4px;
}

/* ==========================================================================
   VRAM Allocation Bars, Fit Status Badges & KPI Cards
   ========================================================================== */
.result-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.result-header h2,
.result-header h3 {
  margin: 0;
  font-size: 1.08rem;
}

.fit-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 1px solid currentColor;
  white-space: nowrap;
}

.fit-badge[data-status="fits"] {
  color: var(--positive);
  background: color-mix(in srgb, var(--positive) 12%, var(--surface));
}

.fit-badge[data-status="tight"],
.fit-badge[data-status="wired_limit_tuning"] {
  color: var(--warning);
  background: color-mix(in srgb, var(--warning) 13%, var(--surface));
}

.fit-badge[data-status="oom"] {
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 13%, var(--surface));
}

.vram-bar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
}

.vram-bar-stack {
  display: flex;
  block-size: 16px;
  inline-size: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--surface-well);
  border: 1px solid var(--border);
}

.vram-seg-weights {
  inline-size: var(--w-pct, 75%);
  background: var(--accent);
}

.vram-seg-kv {
  inline-size: var(--kv-pct, 18%);
  background: repeating-linear-gradient(
    45deg,
    var(--kv-bar),
    var(--kv-bar) 5px,
    color-mix(in srgb, var(--kv-bar) 72%, var(--surface)) 5px,
    color-mix(in srgb, var(--kv-bar) 72%, var(--surface)) 10px
  );
}

.vram-seg-overhead {
  inline-size: var(--ovh-pct, 7%);
  background: var(--ovh-bar);
}

.vram-bar-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-block-start: 8px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
}

.legend-swatch {
  display: inline-block;
  inline-size: 10px;
  block-size: 10px;
  border-radius: 2px;
  margin-inline-end: 5px;
  vertical-align: -1px;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.kpi-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

@media (max-width: 820px) {
  .kpi-grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .kpi-grid,
  .kpi-grid-4 {
    grid-template-columns: 1fr;
  }
}

.kpi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 12px;
}

.kpi-label {
  font-size: 0.76rem;
  color: var(--ink-muted);
  margin-block-end: 2px;
}

.kpi-val {
  font-family: var(--font-mono);
  font-size: 1.12rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.kpi-sub {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-muted);
}

.callout-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  font-size: 0.88rem;
}

.callout-box[data-tone="warning"] {
  border-inline-start-color: var(--warning);
}

.callout-box[data-tone="danger"] {
  border-inline-start-color: var(--danger);
}

/* ==========================================================================
   Tabbed Interfaces (`tabs`)
   ========================================================================== */
.tabs {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.tablist.scroller {
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
  border-block-end: 1px solid var(--border);
  background: var(--surface-well);
  scroll-snap-type: inline proximity;
  --fade-size: 2.5rem;
  scroll-padding-inline: var(--fade-size);
  --fade-dir: right;
  --fade-start-pos: 0;
  --fade-end-pos: 100%;
  mask:
    linear-gradient(black, black) no-clip subtract,
    linear-gradient(to var(--fade-dir), black, transparent) var(--fade-start-pos) 0 / var(--fade-start) 100% no-repeat no-clip,
    linear-gradient(to var(--fade-dir), transparent, black) var(--fade-end-pos) 0 / var(--fade-end) 100% no-repeat no-clip;
  animation: reveal-fade-start linear both, hide-fade-end linear both;
  animation-timeline: scroll(self inline);
  animation-range: 0 var(--fade-size), calc(100% - var(--fade-size)) 100%;
  transition: --fade-start 0.2s, --fade-end 0.2s;

  &:dir(rtl) {
    --fade-dir: left;
    --fade-start-pos: 100%;
    --fade-end-pos: 0;
  }

  &.more-start {
    --fade-start: var(--fade-size);
  }

  &.more-end {
    --fade-end: var(--fade-size);
  }
}

.tablist.scroller::-webkit-scrollbar {
  display: none;
}

@keyframes reveal-fade-start {
  to {
    --fade-start: var(--fade-size);
  }
}

@keyframes hide-fade-end {
  from {
    --fade-end: var(--fade-size);
  }
}

[role="tab"] {
  flex: none;
  position: relative;
  scroll-snap-align: start;
  font: inherit;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 600;
  min-block-size: 44px;
  padding: 10px 16px;
  border: 0;
  background: transparent;
  color: var(--ink-muted);
  cursor: pointer;
  white-space: nowrap;
}

[role="tab"]:hover {
  color: var(--ink);
}

[role="tab"][aria-selected="true"] {
  color: var(--accent);

  &::after {
    content: "";
    position: absolute;
    inset: auto 0 0;
    border-block-end: 3px solid var(--accent);
  }
}

/* Zero padding, border, margin, or gap on [role="tabpanel"] so hidden="until-found" renders no empty strip */
.tabpanels {
  display: grid;
}

[role="tabpanel"] {
  grid-area: 1 / 1;
  min-inline-size: 0;
}

.tabpanel-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-block-start: 0;
  border-end-start-radius: var(--radius-md);
  border-end-end-radius: var(--radius-md);
  padding: 16px;
}

/* ==========================================================================
   Copy Button & Accessible Code Blocks (`copy-button`, `html`)
   ========================================================================== */
.code-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-block-end: 14px;
}

.code-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-block-end: 8px;
}

.code-lang-tag {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--ink-muted);
}

.copy {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.copy-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-inline-size: 32px;
  min-block-size: 32px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--control-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.copy-button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.copy-button .icon {
  inline-size: 14px;
  block-size: 14px;
  display: inline-block;
  background-color: currentColor;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='black' d='M4 2a2 2 0 0 1 2-2h6a2 2 0 0 1 2 2v8a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V2zm2 0v8h6V2H6zM2 5a1 1 0 0 0-1 1v8a2 2 0 0 0 2 2h7a1 1 0 1 0 0-2H3V6a1 1 0 0 0-1-1z'/%3E%3C/svg%3E") no-repeat center / contain;
}

.copy-button[data-copied] {
  border-color: var(--positive);
  color: var(--positive);
}

.copy-button[data-copied] .icon {
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='black' d='M13.78 4.22a.75.75 0 0 1 0 1.06l-7.25 7.25a.75.75 0 0 1-1.06 0L2.22 9.28a.75.75 0 0 1 1.06-1.06L6 10.94l6.72-6.72a.75.75 0 0 1 1.06 0z'/%3E%3C/svg%3E") no-repeat center / contain;
}

.copy-button[data-failed] {
  border-color: var(--danger);
  color: var(--danger);
}

/* Show/hide confirmation live region with opacity only (never display:none or visibility:hidden) */
.copy .tip {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: var(--surface-well);
  border: 1px solid var(--border);
  color: var(--ink);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}

.copy-button[data-copied] + .tip,
.copy-button[data-failed] + .tip {
  opacity: 1;
}

pre {
  font-family: var(--font-mono);
  font-size: 0.83rem;
  line-height: 1.55;
  overflow-x: auto;
  padding: 12px 14px;
  background: var(--surface-well);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--ink);
}

pre code {
  font-family: inherit;
  background: transparent;
  border: 0;
  padding: 0;
}

/* ==========================================================================
   Responsive Data Tables (`responsive-table`)
   ========================================================================== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
  margin-block-end: 14px;
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.filter-bar .field {
  margin-block-end: 0;
  flex: 1 1 220px;
}

.filter-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-block-end: 10px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-muted);
}

.table-wrapper {
  overflow: auto;
  max-inline-size: 100%;
  max-block-size: min(640px, 80vh);
  container-type: inline-size;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

table {
  inline-size: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.88rem;
}

table caption {
  text-align: start;
  padding: 10px 14px;
  font-size: 0.82rem;
  color: var(--ink-muted);
  background: var(--surface-well);
  border-block-end: 1px solid var(--border);
}

thead {
  position: sticky;
  inset-block-start: 0;
  z-index: 2;
}

thead th {
  background: var(--surface-well);
  color: var(--ink);
  font-weight: 700;
  font-size: 0.79rem;
  text-align: start;
  padding: 10px 12px;
  border-block-end: 2px solid var(--border);
  white-space: nowrap;
}

tbody th,
tbody td {
  padding: 10px 12px;
  border-block-end: 1px solid var(--border);
  text-align: start;
  vertical-align: middle;
}

tbody th {
  position: sticky;
  inset-inline-start: 0;
  z-index: 1;
  background: var(--surface);
  font-weight: 600;
}

tbody tr:hover th,
tbody tr:hover td {
  background: color-mix(in srgb, var(--accent) 5%, var(--surface));
}

.num-cell {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.tag-chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  padding: 2px 6px;
  background: var(--surface-well);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

@container (width < 640px) {
  table,
  thead,
  tbody,
  tr,
  th,
  td {
    display: block;
  }

  thead {
    display: none;
  }

  tbody tr {
    margin: 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
  }

  tbody th {
    position: sticky;
    inset-block-start: 0;
    z-index: 2;
    background: var(--surface-well);
  }

  tbody td:nth-child(2)::before {
    content: var(--label-2, "") ": ";
    font-weight: 600;
    color: var(--ink-muted);
  }

  tbody td:nth-child(3)::before {
    content: var(--label-3, "") ": ";
    font-weight: 600;
    color: var(--ink-muted);
  }

  tbody td:nth-child(4)::before {
    content: var(--label-4, "") ": ";
    font-weight: 600;
    color: var(--ink-muted);
  }

  tbody td:nth-child(5)::before {
    content: var(--label-5, "") ": ";
    font-weight: 600;
    color: var(--ink-muted);
  }

  tbody td:nth-child(6)::before {
    content: var(--label-6, "") ": ";
    font-weight: 600;
    color: var(--ink-muted);
  }

  tbody td:nth-child(7)::before {
    content: var(--label-7, "") ": ";
    font-weight: 600;
    color: var(--ink-muted);
  }

  tbody td:nth-child(8)::before {
    content: var(--label-8, "") ": ";
    font-weight: 600;
    color: var(--ink-muted);
  }
}

/* ==========================================================================
   Native Disclosures & Accordions (`accordion`)
   ========================================================================== */
.accordion details,
.arch-override-details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-block-end: 8px;
}

.accordion summary,
.arch-override-details > summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.6ch;
  padding: 12px 14px;
  font-weight: 600;
  cursor: pointer;

  &::before {
    content: "";
    inline-size: 1em;
    block-size: 1em;
    flex-shrink: 0;
    background-color: currentColor;
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='black' d='M3.22 5.72a.75.75 0 0 1 1.06 0L8 9.44l3.72-3.72a.75.75 0 1 1 1.06 1.06l-4.25 4.25a.75.75 0 0 1-1.06 0L3.22 6.78a.75.75 0 0 1 0-1.06z'/%3E%3C/svg%3E") no-repeat center / contain;
    rotate: -90deg;
  }

  &:dir(rtl)::before {
    rotate: 90deg;
  }

  details[open] > &::before {
    rotate: 0deg;
  }

  @media (prefers-reduced-motion: no-preference) {
    &::before {
      transition: rotate 0.2s;
    }
  }
}

.accordion summary::-webkit-details-marker,
.arch-override-details > summary::-webkit-details-marker {
  display: none;
}

details::details-content {
  interpolate-size: allow-keywords;
  overflow: clip;
  contain: layout;
}

details:not([open])::details-content {
  block-size: 0;
}

@media (prefers-reduced-motion: no-preference) {
  details::details-content {
    transition: block-size, content-visibility, display;
    transition-duration: 0.25s;
    transition-timing-function: ease-in-out;
    transition-behavior: allow-discrete;
  }
}

.accordion-body,
.arch-override-body {
  padding: 0 14px 14px;
  color: var(--ink-muted);
}

/* ==========================================================================
   Cards, Spec Grids, GGUF Drop Zone & Footer
   ========================================================================== */
.card-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.card-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

@media (max-width: 960px) {
  .card-grid-3,
  .card-grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 580px) {
  .card-grid-3,
  .card-grid-4 {
    grid-template-columns: 1fr;
  }
}

.info-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
}

a.info-card:hover {
  border-color: var(--accent);
  color: var(--ink);
}

.info-card h3 {
  font-size: 0.98rem;
  margin-block-end: 4px;
}

.info-card p {
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 10px;
  margin-block-end: 16px;
}

.spec-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 12px;
}

.spec-item dt {
  font-size: 0.75rem;
  color: var(--ink-muted);
}

.spec-item dd {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 700;
  margin-block-start: 2px;
}

.drop-zone {
  padding: 20px;
  border: 2px dashed var(--control-border);
  border-radius: var(--radius-md);
  background: var(--surface);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.drop-zone[data-dragover="true"] {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
}

.site-footer {
  margin-block-start: 48px;
  padding-block: 28px 36px;
  background: var(--surface);
  border-block-start: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

/* ---- @codeap/i18n: language switcher, footer links, suggestion banner ---- */
.codeap-lang { position: relative; display: inline-flex; }
.codeap-lang-trigger {
  font: inherit; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.04em;
  min-inline-size: 2.5rem; min-block-size: 2rem; padding: 0.25rem 0.6rem;
  border: 1px solid color-mix(in srgb, currentColor 28%, transparent); border-radius: 6px;
  background: transparent; color: inherit; cursor: pointer;
}
.codeap-lang-trigger:hover { border-color: currentColor; }
.codeap-lang-trigger:focus-visible { outline: 2px solid currentColor; outline-offset: 2px; }
.codeap-lang-menu[popover] {
  padding: 6px; min-inline-size: 12rem;
  border: 1px solid color-mix(in srgb, CanvasText 18%, transparent); border-radius: 8px;
  background: Canvas; color: CanvasText; box-shadow: 0 10px 30px rgb(0 0 0 / 0.18);
}
.codeap-lang-menu:popover-open { display: flex; flex-direction: column; gap: 2px; }
@supports (position-area: block-end) {
  .codeap-lang-menu[popover] {
    inset: auto; margin: 0; margin-block-start: 6px;
    position-area: block-end span-inline-start;
    position-try-fallbacks: flip-block, flip-inline, flip-block flip-inline;
  }
}
.codeap-lang-option {
  display: block; padding: 0.45rem 0.7rem; border-radius: 5px;
  color: inherit; text-decoration: none; font-size: 0.9rem;
}
.codeap-lang-option:hover, .codeap-lang-option:focus-visible { background: color-mix(in srgb, CanvasText 9%, transparent); }
.codeap-lang-option[aria-current="true"] { font-weight: 700; }
.codeap-lang-footer {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.35rem 0.85rem;
  margin-block-start: 0.75rem; font-size: 0.8rem;
}
.codeap-lang-footer-label { opacity: 0.7; }
.codeap-lang-footer-link { color: inherit; }
.codeap-lang-footer-link[aria-current="true"] { font-weight: 700; text-decoration: none; }
.codeap-lang-banner {
  position: fixed; inset-inline: 12px; inset-block-end: 12px; z-index: 50;
  max-inline-size: 36rem; margin-inline: auto;
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.9rem;
  padding: 0.6rem 0.9rem; border-radius: 8px;
  border: 1px solid color-mix(in srgb, CanvasText 18%, transparent);
  background: Canvas; color: CanvasText; box-shadow: 0 8px 24px rgb(0 0 0 / 0.16);
  font-size: 0.88rem;
}
.codeap-lang-banner-text { flex: 1 1 14rem; margin: 0; }
.codeap-lang-banner-action { font-weight: 600; color: inherit; }
.codeap-lang-banner-close {
  font: inherit; padding: 0.3rem 0.7rem; border-radius: 6px; cursor: pointer;
  border: 1px solid color-mix(in srgb, CanvasText 25%, transparent); background: transparent; color: inherit;
}
:where(:lang(de), :lang(fr), :lang(it), :lang(es), :lang(pt-BR)) :where(h1, h2, h3, th, button, summary, .btn) {
  overflow-wrap: break-word; hyphens: auto;
}
:where(:lang(ja), :lang(ko), :lang(zh-CN)) :where(p, li, td, summary, dd) { line-height: 1.75; }
:lang(ja) :where(h1, h2, h3) { word-break: auto-phrase; }