/* ==========================================================================
   CodeAP Studio (codeap.com) — Swiss Precision Minimal Portal Design System
   Applied guides: content-first-noise-reduction, card, accordion,
   dark-mode, dark-mode-toggle, css-layout, defer-rendering-heavy-content, forms
   ========================================================================== */

:root {
  /* Raw light & dark color tokens */
  --bg-light: #F6F5F0;
  --bg-dark: #0C0D0E;
  --surface-light: #FFFFFF;
  --surface-dark: #141619;
  --surface-muted-light: #EFECE6;
  --surface-muted-dark: #1B1E23;
  --ink-light: #111315;
  --ink-dark: #ECEAE3;
  --ink-secondary-light: #4A4F55;
  --ink-secondary-dark: #9CA3AF;
  --ink-muted-light: #687078;
  --ink-muted-dark: #7E8691;
  --border-light: #D8D5CD;
  --border-dark: #2C3038;
  --accent-light: #C84B31;
  --accent-dark: #E05A3F;
  --accent-hover-light: #A63A22;
  --accent-hover-dark: #F06D52;
  --accent-soft-light: rgba(200, 75, 49, 0.10);
  --accent-soft-dark: rgba(224, 90, 63, 0.15);
  --positive-light: #1F7A70;
  --positive-dark: #2A9D8F;

  /* Baseline fallback before light-dark() */
  --bg: var(--bg-light);
  --surface: var(--surface-light);
  --surface-muted: var(--surface-muted-light);
  --ink: var(--ink-light);
  --ink-secondary: var(--ink-secondary-light);
  --ink-muted: var(--ink-muted-light);
  --border: var(--border-light);
  --accent: var(--accent-light);
  --accent-hover: var(--accent-hover-light);
  --accent-soft: var(--accent-soft-light);
  --positive: var(--positive-light);

  --radius: 4px;
  --font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  color-scheme: light dark;
  accent-color: var(--accent);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--bg-dark);
    --surface: var(--surface-dark);
    --surface-muted: var(--surface-muted-dark);
    --ink: var(--ink-dark);
    --ink-secondary: var(--ink-secondary-dark);
    --ink-muted: var(--ink-muted-dark);
    --border: var(--border-dark);
    --accent: var(--accent-dark);
    --accent-hover: var(--accent-hover-dark);
    --accent-soft: var(--accent-soft-dark);
    --positive: var(--positive-dark);
  }
}

:root:has(> head > meta[name="color-scheme"][content="dark"]) {
  color-scheme: dark;
  --bg: var(--bg-dark);
  --surface: var(--surface-dark);
  --surface-muted: var(--surface-muted-dark);
  --ink: var(--ink-dark);
  --ink-secondary: var(--ink-secondary-dark);
  --ink-muted: var(--ink-muted-dark);
  --border: var(--border-dark);
  --accent: var(--accent-dark);
  --accent-hover: var(--accent-hover-dark);
  --accent-soft: var(--accent-soft-dark);
  --positive: var(--positive-dark);
}

:root:has(> head > meta[name="color-scheme"][content="light"]) {
  color-scheme: light;
  --bg: var(--bg-light);
  --surface: var(--surface-light);
  --surface-muted: var(--surface-muted-light);
  --ink: var(--ink-light);
  --ink-secondary: var(--ink-secondary-light);
  --ink-muted: var(--ink-muted-light);
  --border: var(--border-light);
  --accent: var(--accent-light);
  --accent-hover: var(--accent-hover-light);
  --accent-soft: var(--accent-soft-light);
  --positive: var(--positive-light);
}

@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-muted: light-dark(var(--surface-muted-light), var(--surface-muted-dark));
    --ink: light-dark(var(--ink-light), var(--ink-dark));
    --ink-secondary: light-dark(var(--ink-secondary-light), var(--ink-secondary-dark));
    --ink-muted: light-dark(var(--ink-muted-light), var(--ink-muted-dark));
    --border: light-dark(var(--border-light), var(--border-dark));
    --accent: light-dark(var(--accent-light), var(--accent-dark));
    --accent-hover: light-dark(var(--accent-hover-light), var(--accent-hover-dark));
    --accent-soft: light-dark(var(--accent-soft-light), var(--accent-soft-dark));
    --positive: light-dark(var(--positive-light), var(--positive-dark));
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
}

/* Keep anchor targets clear of the sticky header (`content-first-noise-reduction`) */
:target {
  scroll-margin-top: 4.5rem;
}

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

body {
  margin: 0;
  min-block-size: 100dvh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

main {
  flex: 1 0 auto;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

: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;
}

.sr-status {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--positive);
  min-inline-size: 1px;
}

.wrap {
  inline-size: 100%;
  max-inline-size: 1120px;
  margin-inline: auto;
  padding-inline: clamp(16px, 3vw, 28px);
}

/* Compact Single-Row Sticky Header (`content-first-noise-reduction`) */
.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 30;
  background-color: var(--bg);
  border-block-end: 1px solid var(--border);
}

.header-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: safe center;
  justify-content: space-between;
  gap: 10px 18px;
  padding-block: 10px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

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

.nav-links {
  display: flex;
  flex-wrap: wrap;
  flex-wrap: balance;
  align-items: safe center;
  gap: 4px 10px;
}

.nav-links a {
  color: var(--ink-secondary);
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: var(--radius);
  border: 1px solid transparent;
}

.nav-links a:hover {
  color: var(--ink);
  background-color: var(--surface-muted);
}

.nav-links a.active {
  color: var(--ink);
  border-color: var(--border);
  background-color: var(--surface);
}

.header-status {
  display: flex;
  align-items: safe center;
}

.status-dot {
  inline-size: 7px;
  block-size: 7px;
  border-radius: 50%;
  background-color: var(--positive);
  display: inline-block;
  flex-shrink: 0;
}

/* Breadcrumbs */
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-block-start: 16px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
}

.breadcrumb-nav a {
  color: var(--ink-secondary);
  text-decoration: none;
}

.breadcrumb-nav a:hover {
  text-decoration: underline;
}

/* Compact Masthead & Two-Studio Launcher Strip */
.page-masthead {
  padding-block: clamp(20px, 3vw, 30px) 20px;
  border-block-end: 1px solid var(--border);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(1.55rem, 2.8vw, 2.15rem);
  line-height: 1.18;
  letter-spacing: -0.03em;
}

h2 {
  margin: 0;
  font-size: clamp(1.15rem, 1.9vw, 1.38rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h3 {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.32;
  letter-spacing: -0.01em;
}

.gradient-text {
  color: var(--accent);
}

.masthead-lead {
  margin: 0;
  max-inline-size: 72ch;
  font-size: 0.98rem;
  color: var(--ink-secondary);
}

.hero-stat-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-block-start: 12px;
}

.hero-stat-pill {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--surface-muted);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-secondary);
}

.studio-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 290px), 1fr));
  gap: 12px;
  margin-block-start: 16px;
}

.studio-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 13px 16px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-inline-start: 3px solid var(--accent);
  border-radius: var(--radius);
  min-inline-size: 0;
}

.studio-card header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 5px;
}

.studio-domain-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--ink-muted);
}

.studio-card p {
  margin: 0;
  font-size: 0.86rem;
  color: var(--ink-secondary);
}

.studio-card h3 a.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.studio-mark-svg {
  flex: 0 0 auto;
  display: block;
  inline-size: 20px;
  block-size: 20px;
  border-radius: 3px;
}

/* Buttons & Form Controls */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-block-size: 38px;
  padding: 7px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--accent);
  background-color: var(--accent);
  color: #FFFFFF;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #FFFFFF;
}

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

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

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

@media (pointer: coarse) {
  .btn, input {
    min-block-size: 48px;
  }
}

/* Workbench Directory Header & Inline Filter Toolbar */
.directory-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-block-end: 12px;
}

.result-count {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
}

.directory-toolbar {
  display: block;
  margin-block-end: 14px;
}

.directory-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.search-box {
  flex: 1 1 240px;
  min-inline-size: 0;
}

input[type="search"],
input[type="text"] {
  inline-size: 100%;
  min-block-size: 38px;
  padding: 6px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: max(1rem, 0.9rem);
}

.radio-fieldset {
  margin: 0;
  padding: 0;
  border: 0;
  min-inline-size: 0;
}

.radio-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* Zero layout-shift choice pills (`card` & `forms` guides) */
.radio-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-block-size: 38px;
  padding: 5px 11px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--ink-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
}

.radio-pill::before {
  content: "";
  inline-size: 7px;
  block-size: 7px;
  border-radius: 50%;
  border: 1.5px solid var(--ink-muted);
  background-color: transparent;
  flex-shrink: 0;
}

.radio-pill:hover {
  border-color: var(--ink-muted);
  color: var(--ink);
}

.radio-pill:has(> input:checked) {
  border-color: var(--accent);
  background-color: var(--accent-soft);
  color: var(--ink);
}

.radio-pill:has(> input:checked)::before {
  border-color: var(--accent);
  background-color: var(--accent);
}

.radio-pill:has(> input:focus-visible) {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Minimal 2-Region Subgrid Card Directory (`card` & `css-layout` guides) */
.tool-grid {
  display: grid;
  inline-size: 100%;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 12px;
}

article.tool-card {
  container: toolcard / inline-size;
  position: relative;
  grid-row: span 2;
  display: grid;
  /* Same-cascade fallback before subgrid */
  grid-template-rows: auto 1fr;
  grid-template-rows: subgrid;
  row-gap: 6px;
  padding: 14px 16px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-inline-size: 0;
}

article.tool-card[hidden] {
  display: none;
}

article.tool-card header {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-inline-size: 0;
}

.tool-card-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
}

.studio-tag {
  color: var(--ink-secondary);
  font-weight: 600;
}

/* Stretched primary link (`card` guide) */
a.card-link {
  color: var(--ink);
  text-decoration: none;
}

a.card-link::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
}

a.card-link:focus-visible {
  outline: none;
}

.studio-card:has(a.card-link:focus-visible),
article.tool-card:has(a.card-link:focus-visible) {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.studio-card:has(a.card-link:hover),
article.tool-card:has(a.card-link:hover) {
  border-color: var(--accent);
}

.studio-card:has(a.card-link:hover) a.card-link,
article.tool-card:has(a.card-link:hover) a.card-link {
  color: var(--accent);
}

article.tool-card p {
  margin: 0;
  font-size: 0.86rem;
  color: var(--ink-secondary);
}

.empty-directory-state {
  padding: 22px 16px;
  text-align: center;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--ink-secondary);
}

.empty-directory-state p {
  margin: 0 0 10px;
}

code.inline {
  font-family: var(--font-mono);
  font-size: 0.84em;
  padding: 1px 5px;
  border-radius: 3px;
  background-color: var(--surface-muted);
  border: 1px solid var(--border);
}

/* Deferred Below-the-Fold Sections (`defer-rendering-heavy-content`) */
.doc-section {
  padding-block: 22px;
  border-block-start: 1px solid var(--border);
}

#directory.doc-section {
  border-block-start: 0;
  padding-block-start: 20px;
}

.section-deferred {
  content-visibility: auto;
  contain-intrinsic-size: auto none auto 280px;
}

.doc-section > p,
.doc-section li {
  color: var(--ink-secondary);
  max-inline-size: 76ch;
}

/* Responsive Data Table (Architecture page) */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--surface);
  margin-block-start: 14px;
}

.data-table {
  inline-size: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
  text-align: start;
}

.data-table caption {
  text-align: start;
  padding: 9px 14px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-muted);
  background-color: var(--surface-muted);
  border-block-end: 1px solid var(--border);
}

.data-table th,
.data-table td {
  padding: 10px 14px;
  border-block-end: 1px solid var(--border);
  vertical-align: top;
}

.data-table thead th {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-secondary);
  background-color: var(--surface-muted);
}

.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td {
  border-block-end: 0;
}

/* Native Non-Exclusive Accordion (`accordion` & `content-first-noise-reduction` guides) */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-block-start: 12px;
}

.faq-list details {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
}

.faq-list details[open] {
  border-color: var(--ink-muted);
}

.faq-list summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.6ch;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::before {
  content: "";
  inline-size: 0.95em;
  block-size: 0.95em;
  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='M3.2 5.5L8 10.3l4.8-4.8 1.1 1.1L8 12.5 2.1 6.6z'/%3E%3C/svg%3E") no-repeat center / contain;
  rotate: -90deg;
}

.faq-list summary:dir(rtl)::before {
  rotate: 90deg;
}

.faq-list details[open] > summary::before {
  rotate: 0deg;
}

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

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

@media (prefers-reduced-motion: no-preference) {
  .faq-list summary::before {
    transition: rotate 0.18s;
  }

  .faq-list details::details-content {
    transition: block-size 0.22s ease-in-out, content-visibility 0.22s ease-in-out, display 0.22s ease-in-out;
    transition-behavior: allow-discrete;
  }
}

.faq-list details p {
  margin: 8px 0 2px;
  font-size: 0.88rem;
  color: var(--ink-secondary);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  align-items: safe center;
  gap: 10px;
}

/* Footer */
.site-footer {
  margin-block-start: 28px;
  border-block-start: 1px solid var(--border);
  background-color: var(--surface);
  padding-block: 18px;
  font-size: 0.82rem;
  color: var(--ink-secondary);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: safe center;
  justify-content: space-between;
  gap: 12px 20px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  flex-wrap: balance;
  gap: 6px 14px;
}

.footer-links a {
  color: var(--ink-secondary);
  text-decoration: none;
}

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

/* ---- @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; }