/* ==========================================================================
   DevToken Studio — Precision Technical Ledger Design System
   Applied guides: dark-mode, responsive-table, brand-consistent-forms,
   form-fields-automatically-fit-contents, frontend-design, design-taste-frontend
   ========================================================================== */

:root {
  /* Light mode raw tokens (Warm Technical Drafting Paper & Carbon Ink) */
  --bg-light: #f6f5f0;
  --surface-light: #ffffff;
  --surface-well-light: #efece6;
  --border-light: #d6d2c8;
  --border-strong-light: #111315;
  --ink-light: #111315;
  --ink-muted-light: #5a6065;
  --accent-light: #c84b31;
  --accent-contrast-light: #ffffff;
  --positive-light: #15803d;
  --warning-light: #b45309;
  --danger-light: #b91c1c;
  --scroll-track-light: #efece6;
  --scroll-thumb-light: #a8a296;

  /* Dark mode raw tokens (Carbon Obsidian & Chalk Ink — zero violet/neon) */
  --bg-dark: #0c0d0e;
  --surface-dark: #131517;
  --surface-well-dark: #191c1f;
  --border-dark: #262a2e;
  --border-strong-dark: #e5e7eb;
  --ink-dark: #f1f3f5;
  --ink-muted-dark: #90969c;
  --accent-dark: #e05a3f;
  --accent-contrast-dark: #0c0d0e;
  --positive-dark: #22c55e;
  --warning-dark: #f59e0b;
  --danger-dark: #ef4444;
  --scroll-track-dark: #131517;
  --scroll-thumb-dark: #3f444a;

  /* Default fallback assignment before light-dark() evaluation */
  --bg: var(--bg-light);
  --surface: var(--surface-light);
  --surface-well: var(--surface-well-light);
  --border: var(--border-light);
  --border-strong: var(--border-strong-light);
  --ink: var(--ink-light);
  --ink-muted: var(--ink-muted-light);
  --accent: var(--accent-light);
  --accent-contrast: var(--accent-contrast-light);
  --positive: var(--positive-light);
  --warning: var(--warning-light);
  --danger: var(--danger-light);
  --scrollbar-track: var(--scroll-track-light);
  --scrollbar-thumb: var(--scroll-thumb-light);

  /* Sharp technical radius scale (fintech / developer tool standard) */
  --radius-sm: 2px;
  --radius-md: 4px;

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

  /* MANDATORY: viewport-wide native dark/light UI adaptation */
  color-scheme: light dark;
  accent-color: var(--accent);
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

/* Fallback for browsers without light-dark() support */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--bg-dark);
    --surface: var(--surface-dark);
    --surface-well: var(--surface-well-dark);
    --border: var(--border-dark);
    --border-strong: var(--border-strong-dark);
    --ink: var(--ink-dark);
    --ink-muted: var(--ink-muted-dark);
    --accent: var(--accent-dark);
    --accent-contrast: var(--accent-contrast-dark);
    --positive: var(--positive-dark);
    --warning: var(--warning-dark);
    --danger: var(--danger-dark);
    --scrollbar-track: var(--scroll-track-dark);
    --scrollbar-thumb: var(--scroll-thumb-dark);
  }
}

/* Modern CSS light-dark() token binding */
@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));
    --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-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));
    --scrollbar-track: light-dark(var(--scroll-track-light), var(--scroll-track-dark));
    --scrollbar-thumb: light-dark(var(--scroll-thumb-light), var(--scroll-thumb-dark));
  }
}

/* Explicit theme override support via data-theme on html */
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);
  --border-strong: var(--border-strong-dark);
  --ink: var(--ink-dark);
  --ink-muted: var(--ink-muted-dark);
  --accent: var(--accent-dark);
  --accent-contrast: var(--accent-contrast-dark);
  --positive: var(--positive-dark);
  --warning: var(--warning-dark);
  --danger: var(--danger-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);
  --border-strong: var(--border-strong-light);
  --ink: var(--ink-light);
  --ink-muted: var(--ink-muted-light);
  --accent: var(--accent-light);
  --accent-contrast: var(--accent-contrast-light);
  --positive: var(--positive-light);
  --warning: var(--warning-light);
  --danger: var(--danger-light);
}

/* Legacy fallback for WebKit browsers without standard scrollbar-color */
@supports not (scrollbar-color: auto) {
  ::-webkit-scrollbar {
    width: 10px;
    height: 10px;
  }
  ::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
  }
  ::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
  }
}

*, *::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);
}

.wrap {
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: 24px;
}

/* Top technical instrument bar */
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-height: 56px;
  gap: 12px;
  flex-wrap: nowrap;
}

@media (max-width: 980px) {
  .header-bar {
    flex-wrap: wrap;
    padding-block: 8px;
  }
}

.brand-mark {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}

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

.brand-version {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--ink-muted);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.83rem;
  font-weight: 500;
  color: var(--ink-muted);
  padding: 5px 9px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  white-space: nowrap;
}

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

.nav-links a.active {
  color: var(--ink);
  background-color: var(--surface-well);
  border-color: var(--border);
  font-weight: 600;
}

.header-Status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--positive);
}

/* Main layout & section rhythm */
main {
  padding-block: 28px 64px;
}

.page-masthead {
  border-block-end: 1px solid var(--border);
  padding-block-end: 20px;
  margin-block-end: 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  flex-wrap: wrap;
}

h1 {
  font-size: clamp(1.55rem, 2.5vw, 2.15rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  max-width: 68ch;
}

.masthead-lead {
  color: var(--ink-muted);
  font-size: 0.96rem;
  max-width: 72ch;
  margin-block-start: 6px;
}

.sync-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* App Frame / Instrument Workbench */
.app-frame {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-block-end: 32px;
}

.app-frame-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background-color: var(--surface-well);
  border-block-end: 1px solid var(--border);
  gap: 12px;
  flex-wrap: wrap;
}

.app-frame-title {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}

.workbench-split {
  display: grid;
  grid-template-columns: 460px 1fr;
  border-block-end: 1px solid var(--border);
}

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

/* Full-width 2-tier layout for the 6-column Pricing Ledger so zero columns clip */
.pricing-deck {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 20px;
  padding: 18px 20px;
  border-block-end: 1px solid var(--border);
  background-color: var(--surface);
  align-items: start;
}

.pricing-deck > *,
.workbench-split > *,
.field-grid-2 > *,
.field-grid-4 > * {
  min-width: 0;
}

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

.pricing-ledger-body {
  padding: 18px 20px;
  background-color: var(--surface);
  min-width: 0;
}

.workbench-controls {
  padding: 20px;
  border-inline-end: 1px solid var(--border);
  background-color: var(--surface);
  min-width: 0;
}

@media (max-width: 960px) {
  .workbench-controls {
    border-inline-end: none;
    border-block-end: 1px solid var(--border);
  }
}

.workbench-output {
  padding: 20px;
  background-color: var(--surface);
  min-width: 0;
}

.field-group {
  margin-block-end: 14px;
}

label.field-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-muted);
  margin-block-end: 5px;
}

.field-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-block-end: 12px;
}

.field-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-block-end: 12px;
}

@media (max-width: 720px) {
  .field-grid-4 {
    grid-template-columns: 1fr 1fr;
  }
}

/* Auto-fitting form controls per modern-web-guidance (form-fields-automatically-fit-contents) */
input[type="text"],
input[type="number"],
input[type="search"],
select,
textarea {
  background-color: var(--bg);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  width: 100%;
  font-variant-numeric: tabular-nums;
}

input.search-input {
  width: 340px;
  max-width: 100%;
}

select.sort-select {
  width: auto;
  min-width: 245px;
  padding: 5px 10px;
  font-size: 0.78rem;
}

input.auto-fit-input {
  field-sizing: content;
  width: auto;
  min-inline-size: 20ch;
  max-inline-size: 46ch;
}

select.auto-fit-select {
  field-sizing: content;
  width: auto;
  min-inline-size: 14ch;
  max-inline-size: 38ch;
}

textarea {
  field-sizing: content;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  height: auto;
  min-block-size: 3.5lh;
  max-block-size: 15lh;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  overflow-x: hidden;
}

textarea[readonly] {
  min-block-size: 14lh;
  max-block-size: 28lh;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible,
button:focus-visible,
.table-wrapper:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* Fallback for older browsers without accent-color support (brand-consistent-forms) */
@supports not (accent-color: auto) {
  input[type="checkbox"]:checked {
    background-color: var(--accent);
    border-color: var(--accent);
  }
}

/* Buttons — quiet, tactile step-and-press micro-interaction */
.btn-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

button.btn,
a.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background-color: var(--accent);
  color: var(--accent-contrast);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  min-height: 36px;
  transition: transform 0.08s ease, background-color 0.12s ease;
}

button.btn:hover,
a.btn:hover {
  transform: translateY(-1px);
  color: var(--accent-contrast);
}

button.btn:active,
a.btn:active {
  transform: translateY(0);
}

button.btn-quiet,
a.btn-quiet {
  background-color: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border);
}

button.btn-quiet:hover,
a.btn-quiet:hover {
  background-color: var(--surface-well);
  color: var(--ink);
}

/* Provider filter bar */
.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-block-end: 14px;
  padding-block-end: 12px;
  border-block-end: 1px solid var(--border);
}

.provider-pills {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}

button.filter-pill {
  background-color: var(--bg);
  color: var(--ink-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  cursor: pointer;
}

button.filter-pill:hover,
button.filter-pill.active {
  background-color: var(--ink);
  color: var(--surface);
  border-color: var(--ink);
}

/* Summary Readout Strip */
.kpi-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1px;
  background-color: var(--border);
  border: 1px solid var(--border);
  margin-block-end: 16px;
}

.kpi-cell {
  background-color: var(--surface);
  padding: 10px 14px;
}

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

.kpi-val {
  font-family: var(--font-mono);
  font-size: 1.14rem;
  font-weight: 700;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* Responsive Data Table (modern-web-guidance: responsive-table) */
.table-wrapper {
  overflow-x: auto;
  max-inline-size: 100%;
  container-type: inline-size;
  border: 1px solid var(--border);
}

table.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
}

table.data-table caption {
  text-align: left;
  padding: 8px 12px;
  font-size: 0.76rem;
  color: var(--ink-muted);
  background-color: var(--surface-well);
  border-block-end: 1px solid var(--border);
}

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

table.data-table th,
table.data-table td {
  padding: 9px 12px;
  text-align: left;
  border-block-end: 1px solid var(--border);
  background-color: var(--surface);
  white-space: nowrap;
}

table.data-table thead th {
  background-color: var(--surface-well);
  color: var(--ink-muted);
  font-weight: 600;
  font-size: 0.75rem;
}

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

table.data-table tbody tr:hover th,
table.data-table tbody tr:hover td {
  background-color: var(--surface-well);
}

.cost-bar-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cost-bar-fill {
  height: 6px;
  background-color: var(--accent);
  border-radius: 1px;
  min-width: 2px;
}

.tag-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 1px 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--ink-muted);
}

/* Container query stacked layout for narrow containers (< 600px) */
@container (width < 600px) {
  table.data-table,
  table.data-table thead,
  table.data-table tbody,
  table.data-table tr,
  table.data-table th,
  table.data-table td {
    display: block;
    white-space: normal;
  }

  table.data-table thead {
    display: none;
  }

  table.data-table tr {
    margin-block-end: 12px;
    border: 1px solid var(--border);
  }

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

  table.data-table {
    --label-2: "Provider & Date";
    --label-3: "Input / Cached ($/1M)";
    --label-4: "Output ($/1M)";
    --label-5: "Per 1K Calls";
    --label-6: "30-Day Bill";
  }

  table.data-table td:nth-child(2)::before { content: var(--label-2) ": "; color: var(--ink-muted); }
  table.data-table td:nth-child(3)::before { content: var(--label-3) ": "; color: var(--ink-muted); }
  table.data-table td:nth-child(4)::before { content: var(--label-4) ": "; color: var(--ink-muted); }
  table.data-table td:nth-child(5)::before { content: var(--label-5) ": "; color: var(--ink-muted); }
  table.data-table td:nth-child(6)::before { content: var(--label-6) ": "; color: var(--ink-muted); }
}

/* Suite index strip (non-slop architectural index) */
.tool-index-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background-color: var(--border);
  border: 1px solid var(--border);
  margin-block-end: 32px;
}

@media (max-width: 900px) {
  .tool-index-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 540px) {
  .tool-index-grid {
    grid-template-columns: 1fr;
  }
}

.tool-index-cell {
  background-color: var(--surface);
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
  text-decoration: none;
  transition: background-color 0.12s ease;
}

.tool-index-cell:hover {
  background-color: var(--surface-well);
}

.tool-index-cell h3 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ink);
  margin-block-end: 4px;
}

.tool-index-cell p {
  font-size: 0.84rem;
  color: var(--ink-muted);
  line-height: 1.45;
}

.tool-index-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
}

/* Technical reference sections below the fold */
.doc-section {
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 28px;
  margin-block-end: 24px;
}

.doc-section h2 {
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-block-end: 12px;
  padding-block-end: 8px;
  border-block-end: 1px solid var(--border);
}

.doc-section h3 {
  font-size: 1.02rem;
  font-weight: 600;
  margin-block: 16px 8px;
}

.doc-section p,
.doc-section li {
  color: var(--ink);
  max-width: 76ch;
  margin-block-end: 10px;
  font-size: 0.95rem;
}

.doc-section ul,
.doc-section ol {
  padding-inline-start: 20px;
  margin-block-end: 14px;
}

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

pre.code-block {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background-color: var(--surface-well);
  border: 1px solid var(--border);
  padding: 14px;
  overflow-x: auto;
  margin-block-end: 14px;
}

footer.site-footer {
  border-block-start: 1px solid var(--border);
  background-color: var(--surface);
  padding-block: 28px;
  font-size: 0.84rem;
  color: var(--ink-muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}