/* ==========================================================================
   PH-Tools Docs Hub — Design System
   Maps bldgtyp design tokens onto MkDocs Material theme variables and classes.
   Source of truth for visual identity: web/ mockup (Claude Design prototype).
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600&family=JetBrains+Mono:wght@300;400&display=swap');

/* ---------- Design tokens ---------- */
:root {
  /* Brand palette */
  --ph-accent:       #7a9424;
  --ph-accent-light: #e8ecd8;
  --ph-accent-dark:  #4a5916;
  --ph-highlight:    #DC2626;

  /* Light theme surfaces */
  --ph-bg:           #ffffff;
  --ph-bg-elev:      #fafaf7;
  --ph-bg-sunken:    #f5f5f0;
  --ph-fg:           #111111;
  --ph-fg-muted:     #555555;
  --ph-fg-faint:     #8a8a85;
  --ph-border:       #e6e6e0;
  --ph-border-strong:#cccbc2;

  /* Graph paper */
  --ph-grid-minor:       rgba(122, 148, 36, 0.06);
  --ph-grid-major:       rgba(122, 148, 36, 0.12);
  --ph-grid-minor-width: 0.5px;
  --ph-grid-major-width: 0.8px;

  /* Motion */
  --ph-ease: cubic-bezier(.2, .6, .2, 1);

  /* Type stacks */
  --ph-font-sans: 'Outfit', system-ui, sans-serif;
  --ph-font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* Material variable mappings */
  --md-text-font:        "Outfit", sans-serif;
  --md-code-font:        "JetBrains Mono", monospace;
  --md-text-font-family: var(--ph-font-sans);
  --md-code-font-family: var(--ph-font-mono);
}

/* ---------- Light mode → Material variables ---------- */
[data-md-color-scheme="default"] {
  --md-primary-fg-color:          var(--ph-accent);
  --md-primary-fg-color--light:   var(--ph-accent-light);
  --md-primary-fg-color--dark:    var(--ph-accent-dark);
  --md-accent-fg-color:           var(--ph-accent);
  --md-default-bg-color:          var(--ph-bg);
  --md-default-fg-color:          var(--ph-fg);
  --md-default-fg-color--light:   var(--ph-fg-muted);
  --md-default-fg-color--lighter: var(--ph-fg-faint);
  --md-default-fg-color--lightest:var(--ph-border);
  --md-typeset-color:             var(--ph-fg);
  --md-code-bg-color:             var(--ph-bg-sunken);
  --md-footer-bg-color:           var(--ph-bg);
  --md-footer-fg-color:           var(--ph-fg-faint);
  --md-footer-fg-color--light:    var(--ph-fg-muted);
  --md-footer-fg-color--lighter:  var(--ph-fg-faint);
}

/* ---------- Dark mode → Material variables ---------- */
[data-md-color-scheme="slate"] {
  --ph-bg:            #111111;
  --ph-bg-elev:       #181818;
  --ph-bg-sunken:     #0b0b0b;
  --ph-fg:            #ffffff;
  --ph-fg-muted:      #b3b3ad;
  --ph-fg-faint:      #6b6b66;
  --ph-border:        #2a2a28;
  --ph-border-strong: #3a3a36;
  --ph-grid-minor:    rgba(122, 148, 36, 0.09);
  --ph-grid-major:    rgba(122, 148, 36, 0.18);

  --md-primary-fg-color:          var(--ph-accent);
  --md-primary-fg-color--light:   var(--ph-accent-light);
  --md-primary-fg-color--dark:    var(--ph-accent-dark);
  --md-accent-fg-color:           #b3cc4a;
  --md-default-bg-color:          var(--ph-bg);
  --md-default-fg-color:          var(--ph-fg);
  --md-default-fg-color--light:   var(--ph-fg-muted);
  --md-default-fg-color--lighter: var(--ph-fg-faint);
  --md-default-fg-color--lightest:var(--ph-border);
  --md-typeset-color:             var(--ph-fg);
  --md-code-bg-color:             var(--ph-bg-elev);
  --md-footer-bg-color:           var(--ph-bg);
  --md-footer-fg-color:           var(--ph-fg-faint);
  --md-footer-fg-color--light:    var(--ph-fg-muted);
  --md-footer-fg-color--lighter:  var(--ph-fg-faint);
}


/* ==========================================================================
   GLOBAL
   ========================================================================== */

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.md-typeset {
  font-weight: 300;
  line-height: 1.55;
}


/* ==========================================================================
   HEADER — single-row: logo | nav | spacer | search | palette | repo
   Never overflows. Tabs fill available space; search compresses gracefully.
   ========================================================================== */

.md-header {
  background: color-mix(in oklab, var(--ph-bg) 86%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  box-shadow: none;
  border-bottom: 1px solid var(--ph-border);
  height: 64px;
  overflow: hidden;          /* hard guardrail — never scroll horizontally */
}

.md-header[data-md-state="shadow"] {
  box-shadow: none;
}

.md-header__inner {
  height: 64px;
}

/* --- Logo (rigid — never shrinks or wraps) --- */
.md-header__button.ph-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0;
  padding-right: 28px;
  border-right: 1px solid var(--ph-border);
  margin-right: 8px;
  height: 32px;
  flex-shrink: 0;
}

.ph-logo-mark {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.ph-logo-text {
  font-family: var(--ph-font-mono);
  font-weight: 400;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ph-fg);
  white-space: nowrap;
}

.ph-logo-sep {
  color: var(--ph-fg-faint);
  margin-left: 6px;
}

/* Hide Material's default logo img (we use inline SVG) */
.ph-logo img {
  display: none;
}


/* ==========================================================================
   NAVIGATION TABS — inline within header, fills available space
   ========================================================================== */

.md-tabs {
  background: transparent;
  border: none;
  position: static;
  width: auto;
  display: flex !important;
  align-items: center;
  flex: 1 1 auto;            /* fill leftover space between logo and search */
  min-width: 0;              /* allow flex shrinking past content size */
  overflow: hidden;           /* clip rather than overflow */
}

.md-tabs .md-grid {
  max-width: none;
  margin: 0;
  padding: 0;
  width: auto;
  min-width: 0;
  overflow: hidden;
}

.md-tabs__list {
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
  min-width: 0;
  overflow: hidden;
}

/* Hide "Home" tab */
.md-tabs__item:first-child {
  display: none;
}

.md-tabs__item {
  height: auto;
  padding: 0;
  min-width: 0;
  flex-shrink: 0;            /* tabs don't truncate — they hide at breakpoint */
}

.md-tabs__link {
  font-family: var(--ph-font-mono);
  font-weight: 400;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--ph-fg-muted);
  opacity: 1;
  margin-top: 0;
  padding: 8px 14px;
  border-radius: 2px;
  transition: color 0.2s var(--ph-ease), background 0.2s var(--ph-ease);
  white-space: nowrap;
}

.md-tabs__link:hover {
  color: var(--ph-fg);
  background: var(--ph-bg-elev);
}

.md-tabs__link--active {
  color: var(--ph-accent);
  font-weight: 400;
}

[data-md-color-scheme="slate"] .md-tabs__link--active {
  color: #b3cc4a;
}

.md-tabs__link--active::after {
  display: none;
}


/* ==========================================================================
   SEARCH TRIGGER — inline button that opens Material's search modal
   ========================================================================== */

.ph-search-trigger {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 10px 0 12px;
  height: 34px;
  min-width: 0;              /* can shrink */
  border: 1px solid var(--ph-border-strong);
  background: var(--ph-bg-elev);
  border-radius: 2px;
  color: var(--ph-fg-faint);
  font-family: var(--ph-font-mono);
  font-size: 12px;
  font-weight: 300;
  cursor: pointer;
  transition: border-color 0.15s var(--ph-ease), color 0.15s var(--ph-ease);
  margin-right: 4px;
  flex-shrink: 0;
}

.ph-search-trigger:hover {
  border-color: var(--ph-accent);
  color: var(--ph-fg-muted);
}

.ph-search-trigger__icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.ph-search-trigger__text {
  white-space: nowrap;
}

.ph-search-trigger__kbd {
  margin-left: auto;
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  padding: 2px 6px;
  border: 1px solid var(--ph-border-strong);
  border-radius: 2px;
  color: var(--ph-fg-faint);
  line-height: 1;
}

/* Hide Material's default search icon (replaced by trigger) */
.md-header__button.md-icon[for="__search"] {
  display: none;
}

/* Hide Material's search widget in resting state — only show as modal */
.md-search {
  display: none !important;
}

[data-md-toggle="search"]:checked ~ .md-header .md-search {
  display: block !important;
}


/* ==========================================================================
   HEADER — right-side elements (source, palette)
   ========================================================================== */

.md-header__source {
  margin-left: 4px;
  flex-shrink: 0;
}

.md-source {
  color: var(--ph-fg-muted);
}
.md-source:hover {
  color: var(--ph-fg);
}
.md-source__icon {
  color: var(--ph-fg-muted);
}

.md-source__repository {
  font-family: var(--ph-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}


/* ==========================================================================
   SIDEBAR
   ========================================================================== */

.md-sidebar {
  border-right: 1px solid var(--ph-border);
}

.md-sidebar--secondary {
  display: none;
}

/* Hide lifted section label (redundant with tab heading) */
.md-sidebar--primary .md-nav--lifted > .md-nav__list > .md-nav__item--section > label.md-nav__link {
  display: none !important;
}

/* Section labels */
.md-nav__title {
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  font-weight: 300;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ph-fg-faint);
  padding: 14px 12px 10px;
}

.md-nav__title .md-nav__icon {
  color: var(--ph-fg-faint);
}

/* Nav links */
.md-nav__link {
  font-family: var(--ph-font-sans);
  font-weight: 300;
  font-size: 13.5px;
  color: var(--ph-fg-muted);
  border-radius: 2px;
  transition: all 0.15s var(--ph-ease);
}

.md-nav__link:hover {
  color: var(--ph-fg);
}

/* Active nav item */
.md-nav__link--active,
.md-nav__item .md-nav__link--active {
  color: var(--ph-accent);
  font-weight: 500;
}

[data-md-color-scheme="slate"] .md-nav__link--active,
[data-md-color-scheme="slate"] .md-nav__item .md-nav__link--active {
  color: #b3cc4a;
}

/* Active indicator bar */
.md-nav__link--active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: var(--ph-accent);
}

[data-md-color-scheme="slate"] .md-nav__link--active::before {
  background: #b3cc4a;
}

/* Indent line for integrated TOC items in primary sidebar */
.md-sidebar--primary .md-nav__list:has(> .md-nav__item > .md-nav__link[href^="#"]) {
  border-left: 1px dashed var(--ph-border-strong);
  margin-left: 8px;
  padding-left: 6px;
}

/* --- Sidebar auto-numbering --- */
/* Numbers top-level nav items (01, 02, ...) in the primary sidebar */
.md-sidebar--primary .md-nav--lifted > .md-nav__list {
  counter-reset: ph-nav;
}

.md-sidebar--primary .md-nav--lifted > .md-nav__list > .md-nav__item {
  counter-increment: ph-nav;
}

.md-sidebar--primary .md-nav--lifted > .md-nav__list > .md-nav__item > .md-nav__link::before,
.md-sidebar--primary .md-nav--lifted > .md-nav__list > .md-nav__item > nav > .md-nav__title::before {
  content: counter(ph-nav, decimal-leading-zero);
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  font-weight: 300;
  color: var(--ph-fg-faint);
  min-width: 22px;
  margin-right: 8px;
  display: inline-block;
}

.md-sidebar--primary .md-nav--lifted > .md-nav__list > .md-nav__item > .md-nav__link--active::before {
  color: var(--ph-accent);
}

[data-md-color-scheme="slate"] .md-sidebar--primary .md-nav--lifted > .md-nav__list > .md-nav__item > .md-nav__link--active::before {
  color: #b3cc4a;
}

/* Integrated TOC numbering (1, 2, 3...) in primary sidebar */
.md-sidebar--primary .md-nav__list:has(> .md-nav__item > .md-nav__link[href^="#"]) {
  counter-reset: ph-toc;
}

.md-sidebar--primary .md-nav__item:has(> .md-nav__link[href^="#"]) {
  counter-increment: ph-toc;
}

.md-sidebar--primary .md-nav__link[href^="#"]::before {
  content: counter(ph-toc) ".";
  font-family: var(--ph-font-mono);
  font-size: 10px;
  color: var(--ph-fg-faint);
  margin-right: 8px;
  min-width: 18px;
  display: inline-block;
}

.md-sidebar--primary .md-nav__link[href^="#"].md-nav__link--active::before {
  color: var(--ph-accent);
  position: static;
  width: auto;
  background: none;
}

[data-md-color-scheme="slate"] .md-sidebar--primary .md-nav__link[href^="#"].md-nav__link--active::before {
  color: #b3cc4a;
}


/* ==========================================================================
   MAIN CONTENT
   ========================================================================== */

.md-content {
  max-width: 1100px;
}

.md-content__inner {
  padding-top: 48px;
  padding-bottom: 80px;
}

/* Page title */
.md-typeset h1 {
  font-family: var(--ph-font-sans);
  font-weight: 600;
  font-size: 42px;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: var(--ph-fg);
  margin-bottom: 20px;
}

.md-typeset h2 {
  font-family: var(--ph-font-sans);
  font-weight: 600;
  font-size: 24px;
  letter-spacing: -0.015em;
  line-height: 1.15;
  border-bottom: 1px solid var(--ph-border);
  padding-bottom: 10px;
}

.md-typeset h3 {
  font-family: var(--ph-font-sans);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.md-typeset h4,
.md-typeset h5,
.md-typeset h6 {
  font-family: var(--ph-font-sans);
  font-weight: 600;
  letter-spacing: -0.005em;
}

/* Body text */
.md-typeset p {
  font-weight: 300;
  color: var(--ph-fg-muted);
}

/* Links */
.md-typeset a {
  color: var(--ph-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s var(--ph-ease);
}

.md-typeset a:hover {
  border-bottom-color: var(--ph-accent);
}

[data-md-color-scheme="slate"] .md-typeset a {
  color: #b3cc4a;
}

[data-md-color-scheme="slate"] .md-typeset a:hover {
  border-bottom-color: #b3cc4a;
}

/* Inline code */
.md-typeset code {
  font-family: var(--ph-font-mono);
  font-size: 13px;
  font-weight: 400;
  border-radius: 2px;
  padding: 2px 6px;
  border: 1px solid var(--ph-border);
  background: var(--ph-bg-sunken);
  color: var(--ph-fg);
}

/* Code blocks */
.md-typeset pre > code {
  border: 1px solid var(--ph-border);
  border-radius: 4px;
  font-size: 13px;
  font-weight: 400;
  padding: 16px 20px;
}

/* Tables */
.md-typeset table:not([class]) {
  border: 1px solid var(--ph-border);
  border-collapse: collapse;
  font-size: 14px;
}

.md-typeset table:not([class]) th {
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  font-weight: 300;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ph-fg-faint);
  background: var(--ph-bg-sunken);
  border-bottom: 1px solid var(--ph-border);
  padding: 12px 16px;
}

.md-typeset table:not([class]) td {
  border-bottom: 1px solid var(--ph-border);
  padding: 14px 16px;
  font-weight: 300;
  color: var(--ph-fg-muted);
}

.md-typeset table:not([class]) tr:hover td {
  background: var(--ph-bg-elev);
}

/* Admonitions */
.md-typeset .admonition,
.md-typeset details {
  border: 1px solid var(--ph-border);
  border-radius: 4px;
  box-shadow: none;
  font-size: 14px;
}

.md-typeset .admonition-title,
.md-typeset summary {
  font-family: var(--ph-font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
}


/* ==========================================================================
   SEARCH
   ========================================================================== */

/* --- Search overlay (backdrop) --- */
.md-search__overlay {
  background: rgba(17, 17, 17, 0.48);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

[data-md-color-scheme="slate"] .md-search__overlay {
  background: rgba(0, 0, 0, 0.6);
}

/* --- Search modal container --- */
.md-search__inner {
  border: 1px solid var(--ph-border-strong);
  border-radius: 4px;
  box-shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.3), 0 4px 12px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

/* --- Search form / input --- */
.md-search__form {
  border-radius: 0;
  background: var(--ph-bg);
  border: none;
  border-bottom: 1px solid var(--ph-border);
  padding: 4px 0;
}

.md-search__input {
  font-family: var(--ph-font-sans);
  font-weight: 300;
  font-size: 19px;
  color: var(--ph-fg);
}

.md-search__input::placeholder {
  color: var(--ph-fg-faint);
  font-weight: 300;
}

/* Search icon in accent */
.md-search__icon[for="__search"] svg:first-child {
  color: var(--ph-accent);
}

[data-md-color-scheme="slate"] .md-search__icon[for="__search"] svg:first-child {
  color: #b3cc4a;
}

/* --- ESC badge --- */
.ph-search-esc {
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  padding: 3px 8px;
  border: 1px solid var(--ph-border-strong);
  border-radius: 2px;
  color: var(--ph-fg-faint);
  cursor: pointer;
  background: transparent;
  transition: all 0.15s var(--ph-ease);
  line-height: 1;
}

.ph-search-esc:hover {
  border-color: var(--ph-fg-muted);
  color: var(--ph-fg-muted);
}

/* --- Search output area --- */
.md-search__output {
  background: var(--ph-bg);
}

.md-search__scrollwrap {
  max-height: 60vh;
}

/* --- Result meta (status line) --- */
.md-search-result__meta {
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ph-fg-faint);
  background: var(--ph-bg-sunken);
  border-bottom: 1px solid var(--ph-border);
  padding: 12px 24px;
}

/* --- Individual results --- */
.md-search-result__item {
  border-bottom: 1px solid var(--ph-border);
}

.md-search-result__link {
  border-bottom: none;
  padding: 14px 24px;
  transition: background 0.12s var(--ph-ease);
}

.md-search-result__link:hover,
.md-search-result__link[data-md-state="active"] {
  background: var(--ph-accent-light);
}

[data-md-color-scheme="slate"] .md-search-result__link:hover,
[data-md-color-scheme="slate"] .md-search-result__link[data-md-state="active"] {
  background: rgba(122, 148, 36, 0.10);
}

/* Result title */
.md-search-result__article h1 {
  font-family: var(--ph-font-sans);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.005em;
  color: var(--ph-fg);
}

/* Result breadcrumb */
.md-search-result__teaser {
  font-family: var(--ph-font-sans);
  font-weight: 300;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ph-fg-muted);
}

/* Search term highlighting */
.md-search-result mark {
  background: transparent;
  color: var(--ph-accent);
  font-weight: 500;
  border-bottom: 1px solid var(--ph-accent);
  padding-bottom: 1px;
}

[data-md-color-scheme="slate"] .md-search-result mark {
  color: #b3cc4a;
  border-bottom-color: #b3cc4a;
}

/* "More on this page" links */
.md-search-result__terms {
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--ph-fg-faint);
}

/* --- Keyboard shortcut footer --- */
.ph-search-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 24px;
  background: var(--ph-bg-sunken);
  border-top: 1px solid var(--ph-border);
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  font-weight: 300;
  color: var(--ph-fg-faint);
}

.ph-search-footer__kbds {
  display: flex;
  gap: 14px;
}

.ph-search-footer__kbds span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.ph-kbd {
  padding: 2px 6px;
  border: 1px solid var(--ph-border-strong);
  border-radius: 2px;
  color: var(--ph-fg-muted);
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
}


/* ==========================================================================
   FOOTER
   ========================================================================== */

/* Prev/next nav */
.md-footer__inner {
  border-top: 1px solid var(--ph-border);
}

.md-footer__link {
  font-family: var(--ph-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.md-footer__direction {
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  font-weight: 300;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ph-fg-faint);
}

/* Material footer-meta → replaced by ph-footer partial */
.md-footer-meta {
  display: none;
}

/* Custom footer bar */
.ph-footer {
  border-top: 1px solid var(--ph-border);
  padding: 36px 0;
  background: var(--ph-bg);
}

.ph-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  font-family: var(--ph-font-mono);
  font-size: 11.5px;
  font-weight: 300;
  color: var(--ph-fg-faint);
  letter-spacing: 0.04em;
}

.ph-footer__left {
  display: flex;
  gap: 12px;
  align-items: center;
}

.ph-footer__left a {
  color: var(--ph-fg-muted);
  text-decoration: none;
  transition: color 0.15s var(--ph-ease);
}

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

.ph-footer__dot {
  color: var(--ph-border-strong);
}

.ph-footer__right {
  display: flex;
  gap: 20px;
  align-items: center;
  color: var(--ph-fg-faint);
}


/* ==========================================================================
   GRAPH PAPER — utility classes for landing/hero sections
   ========================================================================== */

.ph-graph-paper {
  background-image:
    linear-gradient(to right,  var(--ph-grid-major) var(--ph-grid-major-width), transparent var(--ph-grid-major-width)),
    linear-gradient(to bottom, var(--ph-grid-major) var(--ph-grid-major-width), transparent var(--ph-grid-major-width)),
    linear-gradient(to right,  var(--ph-grid-minor) var(--ph-grid-minor-width), transparent var(--ph-grid-minor-width)),
    linear-gradient(to bottom, var(--ph-grid-minor) var(--ph-grid-minor-width), transparent var(--ph-grid-minor-width));
  background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px;
  background-position: -1px -1px;
}

.ph-graph-paper-subtle {
  background-image:
    linear-gradient(to right,  var(--ph-grid-minor) var(--ph-grid-minor-width), transparent var(--ph-grid-minor-width)),
    linear-gradient(to bottom, var(--ph-grid-minor) var(--ph-grid-minor-width), transparent var(--ph-grid-minor-width));
  background-size: 20px 20px;
}


/* ==========================================================================
   TYPOGRAPHY UTILITIES — for custom templates (landing page, etc.)
   ========================================================================== */

.ph-label {
  font-family: var(--ph-font-mono);
  font-weight: 300;
  font-size: 12px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ph-fg-muted);
}

.ph-mono {
  font-family: var(--ph-font-mono);
  font-weight: 400;
}

.ph-display {
  font-family: var(--ph-font-sans);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.02;
}

.ph-title {
  font-family: var(--ph-font-sans);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.1;
}

.ph-body-light {
  font-family: var(--ph-font-sans);
  font-weight: 300;
  color: var(--ph-fg-muted);
}


/* ==========================================================================
   PILL / BUTTON — reusable component for landing and content pages
   ========================================================================== */

.ph-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  font-family: var(--ph-font-mono);
  font-weight: 400;
  font-size: 12px;
  letter-spacing: 0.04em;
  border: 1px solid var(--ph-border-strong);
  border-radius: 999px;
  color: var(--ph-fg);
  background: var(--ph-bg);
  text-decoration: none;
  transition: all 0.15s var(--ph-ease);
  cursor: pointer;
}

.ph-pill:hover {
  border-color: var(--ph-accent);
  color: var(--ph-accent);
  background: var(--ph-accent-light);
}

[data-md-color-scheme="slate"] .ph-pill:hover {
  background: rgba(122, 148, 36, 0.12);
  color: #b3cc4a;
}

.ph-pill--accent {
  border-color: var(--ph-accent);
  color: var(--ph-accent);
  background: var(--ph-accent-light);
}

[data-md-color-scheme="slate"] .ph-pill--accent {
  background: rgba(122, 148, 36, 0.12);
  color: #b3cc4a;
}


/* ==========================================================================
   CONTENT COMPONENTS — Reusable patterns for library + reference pages
   ========================================================================== */

/* --- Metadata Strip ---
   Horizontal row of key-value pairs below a page title.
   Usage: <div class="ph-meta-strip"> <div class="ph-meta-item">...</div> </div>
*/
.ph-meta-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid var(--ph-border);
  margin: 24px 0 32px 0;
}

.ph-meta-item {
  padding: 14px 24px 14px 0;
  margin-right: 24px;
  border-right: 1px dashed var(--ph-border-strong);
}

.ph-meta-item:last-child {
  border-right: 0;
  margin-right: 0;
}

.ph-meta-item .ph-meta-k {
  font-family: var(--ph-font-mono);
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ph-fg-faint);
  display: block;
  margin-bottom: 6px;
}

.ph-meta-item .ph-meta-v {
  font-family: var(--ph-font-mono);
  font-size: 12.5px;
  font-weight: 400;
  color: var(--ph-fg);
}

/* --- Fetch Callout ---
   Styled box for "LLM-ready · Fetch this doc" pattern.
   Usage: <div class="ph-fetch-callout">...</div>
*/
.ph-fetch-callout {
  border: 1px solid var(--ph-accent);
  border-radius: 4px;
  background: linear-gradient(to right, var(--ph-accent-light), transparent 80%);
  position: relative;
  overflow: hidden;
  margin: 32px 0;
}

[data-md-color-scheme="slate"] .ph-fetch-callout {
  background: linear-gradient(to right, rgba(122, 148, 36, 0.14), transparent 80%);
}

.ph-fetch-callout::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--ph-accent);
}

.ph-fetch-callout__inner {
  padding: 22px 26px 22px 30px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}

.ph-fetch-callout__head {
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ph-accent-dark);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

[data-md-color-scheme="slate"] .ph-fetch-callout__head {
  color: #b3cc4a;
}

.ph-fetch-callout__head .ph-bullet {
  width: 7px;
  height: 7px;
  background: var(--ph-accent);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(122, 148, 36, 0.2);
  display: inline-block;
}

.ph-fetch-callout__body {
  font-family: var(--ph-font-sans);
  font-weight: 300;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ph-fg-muted);
  margin-bottom: 14px;
  max-width: 60ch;
}

.ph-fetch-callout__url {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--ph-bg);
  border: 1px solid var(--ph-border-strong);
  border-radius: 3px;
  font-family: var(--ph-font-mono);
  font-size: 12.5px;
  font-weight: 400;
  color: var(--ph-fg);
  max-width: fit-content;
}

.ph-fetch-callout__url .ph-method {
  padding: 2px 8px;
  border: 1px solid var(--ph-accent);
  color: var(--ph-accent);
  border-radius: 2px;
  font-size: 10px;
  letter-spacing: 0.12em;
}

[data-md-color-scheme="slate"] .ph-fetch-callout__url .ph-method {
  color: #b3cc4a;
  border-color: #b3cc4a;
}

/* --- Feature Grid ---
   2-column grid of feature cells for library overview pages.
   Usage: <div class="ph-feature-grid"> <div class="ph-f-cell">...</div> </div>
*/
.ph-feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--ph-border);
  border-left: 1px solid var(--ph-border);
  margin: 32px 0;
}

.ph-f-cell {
  padding: 26px 28px 28px 28px;
  border-right: 1px solid var(--ph-border);
  border-bottom: 1px solid var(--ph-border);
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 168px;
}

.ph-f-cell__idx {
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  font-weight: 300;
  letter-spacing: 0.18em;
  color: var(--ph-accent);
}

[data-md-color-scheme="slate"] .ph-f-cell__idx {
  color: #b3cc4a;
}

.ph-f-cell__title {
  font-family: var(--ph-font-sans);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ph-fg);
}

.ph-f-cell__desc {
  font-family: var(--ph-font-sans);
  font-weight: 300;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ph-fg-muted);
  margin: 0;
}

.ph-f-cell__link {
  margin-top: auto;
  font-family: var(--ph-font-mono);
  font-size: 11.5px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--ph-fg);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px dashed var(--ph-border-strong);
  border-bottom: none;
}

.ph-f-cell__link:hover {
  color: var(--ph-accent);
  border-bottom: none;
}

[data-md-color-scheme="slate"] .ph-f-cell__link:hover {
  color: #b3cc4a;
}

/* --- Section Label ---
   Mono uppercase label used above schema table sections, etc.
   Usage: <div class="ph-section-label">§ 01 · Top-Level Elements</div>
*/
.ph-section-label {
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  font-weight: 300;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ph-accent);
  margin: 48px 0 4px 0;
}

[data-md-color-scheme="slate"] .ph-section-label {
  color: #b3cc4a;
}

/* Responsive content components */
@media (max-width: 960px) {
  .ph-feature-grid {
    grid-template-columns: 1fr;
  }

  .ph-fetch-callout__inner {
    grid-template-columns: 1fr;
  }

  .ph-meta-strip {
    flex-direction: column;
  }

  .ph-meta-item {
    border-right: none;
    margin-right: 0;
    border-bottom: 1px dashed var(--ph-border-strong);
    padding: 10px 0;
  }

  .ph-meta-item:last-child {
    border-bottom: none;
  }
}


/* ==========================================================================
   LANDING PAGE — Hero, Library Cards, Quick Strip
   ========================================================================== */

/* Landing page resets: full-width, no Material content padding */
.ph-home {
  margin: 0;
  padding: 0;
}

/* Override Material typeset styles inside landing page */
.ph-home h1, .ph-home h2, .ph-home h3,
.ph-home p, .ph-home a {
  margin: 0;
}

/* --- Hero --- */
.ph-hero {
  position: relative;
  overflow: hidden;
  padding: 120px 40px 140px 40px;
  border-bottom: 1px solid var(--ph-border);
}

.ph-hero__inner {
  max-width: 1240px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.ph-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 36px;
}

.ph-hero__eyebrow-line {
  width: 48px;
  height: 1px;
  background: var(--ph-accent);
}

.ph-hero__eyebrow-text {
  font-family: var(--ph-font-mono);
  font-weight: 300;
  font-size: 11.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ph-fg-muted);
}

.ph-hero__title {
  font-family: var(--ph-font-sans);
  font-weight: 500;
  font-size: clamp(52px, 7vw, 96px);
  line-height: 1.0;
  letter-spacing: -0.03em;
  margin: 0 0 28px 0;
  max-width: 14ch;
  color: var(--ph-fg);
  border-bottom: none;
  padding-bottom: 0;
}

.ph-hero__title em {
  font-style: normal;
  color: var(--ph-accent);
  font-weight: 600;
}

[data-md-color-scheme="slate"] .ph-hero__title em {
  color: #b3cc4a;
}

.ph-hero__sub {
  font-family: var(--ph-font-mono);
  font-weight: 300;
  font-size: 14.5px;
  color: var(--ph-fg-muted);
  max-width: 54ch;
  line-height: 1.55;
}

.ph-hero__sub b {
  color: var(--ph-fg);
  font-weight: 400;
}

.ph-hero__meta {
  position: absolute;
  right: 40px;
  top: 120px;
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  font-weight: 300;
  color: var(--ph-fg-faint);
  letter-spacing: 0.14em;
  text-align: right;
  line-height: 1.8;
  z-index: 2;
}

.ph-hero__meta b {
  font-weight: 400;
  color: var(--ph-fg-muted);
  display: block;
}

/* Architectural SVG decoration */
.ph-hero__drafting {
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 520px;
  height: 380px;
  opacity: 0.18;
  pointer-events: none;
  z-index: 1;
}

[data-md-color-scheme="slate"] .ph-hero__drafting {
  opacity: 0.22;
}

/* --- Library Cards --- */
.ph-libraries {
  padding: 80px 40px 100px 40px;
  max-width: 1240px;
  margin: 0 auto;
}

.ph-libraries__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--ph-border);
  padding-bottom: 22px;
  margin-bottom: 48px;
}

.ph-libraries__head h2 {
  font-family: var(--ph-font-sans);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--ph-fg);
  border-bottom: none;
  padding-bottom: 0;
}

.ph-libraries__count {
  font-family: var(--ph-font-mono);
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ph-fg-faint);
}

.ph-lib-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--ph-border);
  border-left: 1px solid var(--ph-border);
}

.ph-lib-card {
  position: relative;
  padding: 40px 36px 36px 36px;
  border-right: 1px solid var(--ph-border);
  border-bottom: 1px solid var(--ph-border);
  background: var(--ph-bg);
  text-decoration: none;
  color: var(--ph-fg);
  transition: background 0.2s var(--ph-ease);
  display: flex;
  flex-direction: column;
  min-height: 280px;
  cursor: pointer;
  overflow: hidden;
}

.ph-lib-card:hover {
  background: var(--ph-bg-elev);
  border-bottom-color: var(--ph-border);
}

/* Accent tick on hover */
.ph-lib-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--ph-accent);
  transition: width 0.35s var(--ph-ease);
}

.ph-lib-card:hover::before {
  width: 100%;
}

.ph-lib-card__idx {
  font-family: var(--ph-font-mono);
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 0.18em;
  color: var(--ph-fg-faint);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 28px;
}

.ph-lib-card__idx-num {
  color: var(--ph-accent);
  font-weight: 400;
}

[data-md-color-scheme="slate"] .ph-lib-card__idx-num {
  color: #b3cc4a;
}

.ph-lib-card__idx-dash {
  flex: 1;
  height: 1px;
  background: var(--ph-border);
}

.ph-lib-card__tag {
  font-family: var(--ph-font-mono);
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ph-accent);
  margin-bottom: 14px;
}

[data-md-color-scheme="slate"] .ph-lib-card__tag {
  color: #b3cc4a;
}

.ph-lib-card__name {
  font-family: var(--ph-font-sans);
  font-weight: 600;
  font-size: 30px;
  letter-spacing: -0.015em;
  line-height: 1.05;
  color: var(--ph-fg);
  margin: 0 0 10px 0;
}

.ph-lib-card__desc {
  font-family: var(--ph-font-sans);
  font-weight: 300;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--ph-fg-muted);
  max-width: 36ch;
  margin: 0 0 28px 0;
}

.ph-lib-card__footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  border-top: 1px dashed var(--ph-border-strong);
}

.ph-lib-card__cta {
  font-family: var(--ph-font-mono);
  font-weight: 400;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ph-fg);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.ph-lib-card__arr {
  transition: transform 0.25s var(--ph-ease);
}

.ph-lib-card:hover .ph-lib-card__arr {
  transform: translateX(4px);
}

/* --- Quick Strip --- */
.ph-quick-strip {
  padding: 44px 40px 60px 40px;
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.ph-quick-strip__item {
  padding: 22px 0;
  border-top: 1px solid var(--ph-border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.ph-quick-strip__k {
  font-family: var(--ph-font-mono);
  font-size: 10.5px;
  font-weight: 300;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ph-fg-faint);
}

.ph-quick-strip__v {
  font-family: var(--ph-font-sans);
  font-weight: 500;
  font-size: 15px;
  color: var(--ph-fg);
}

.ph-quick-strip__v a {
  color: var(--ph-fg);
  text-decoration: none;
  border-bottom: 1px solid var(--ph-border-strong);
  padding-bottom: 1px;
  transition: color 0.15s var(--ph-ease), border-color 0.15s var(--ph-ease);
}

.ph-quick-strip__v a:hover {
  color: var(--ph-accent);
  border-color: var(--ph-accent);
}

[data-md-color-scheme="slate"] .ph-quick-strip__v a:hover {
  color: #b3cc4a;
  border-color: #b3cc4a;
}


/* ==========================================================================
   RESPONSIVE — header degrades: full → compact search → icon-only search →
   hide tabs → icon-only logo. No horizontal scroll at any width.
   ========================================================================== */

/* Keep logo visible at Material's hide breakpoint */
@media screen and (max-width: 76.2344em) {
  .md-header__button.md-logo {
    display: flex;
  }
}

/* ~1100px: collapse search to icon + kbd only (drop "Search docs…" text) */
@media (max-width: 1100px) {
  .ph-search-trigger__text {
    display: none;
  }
}

/* ≤960px: hide tabs and logo text, icon-only search */
@media (max-width: 960px) {
  .ph-logo-text {
    display: none;
  }

  .ph-logo {
    border-right: none;
    padding-right: 0;
    margin-right: 0;
  }

  .md-tabs {
    display: none !important;
  }

  .ph-search-trigger__kbd {
    display: none;
  }

  .ph-search-trigger {
    padding: 0 8px;
    border: none;
    background: transparent;
  }

  .ph-footer__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .ph-lib-grid {
    grid-template-columns: 1fr;
  }

  .ph-quick-strip {
    grid-template-columns: repeat(2, 1fr);
    padding-left: 28px;
    padding-right: 28px;
  }

  .ph-hero {
    padding: 80px 28px 100px 28px;
  }

  .ph-hero__meta {
    display: none;
  }

  .ph-libraries {
    padding-left: 28px;
    padding-right: 28px;
  }
}