/* ═══════════════════════════════════════════════════════════════════════
   PhysLink Docs — Vercel Design System (Light Theme)
   Targets: MkDocs Material ≥ 9.5, default (light) scheme
   ═══════════════════════════════════════════════════════════════════════ */

/* ── FONTS ── */
@import url('https://fonts.googleapis.com/css2?family=Geist:wght@300;400;500;600;700;800&display=swap');

/* ── DESIGN TOKENS ── */
:root {
  --vl-bg:        #ffffff;
  --vl-surface:   #fafafa;
  --vl-elevated:  #f4f4f5;
  --vl-border:    rgba(0,0,0,0.08);
  --vl-border-hi: rgba(0,0,0,0.14);
  --vl-text:      #111111;
  --vl-text-2:    #555555;
  --vl-text-3:    #999999;
  --vl-sans:      'Geist', -apple-system, BlinkMacSystemFont, sans-serif;
  --vl-mono:      ui-monospace, 'Cascadia Code', 'JetBrains Mono', monospace;
}

/* ── MATERIAL VARIABLE OVERRIDES (default / light scheme) ── */
[data-md-color-scheme="default"] {
  --md-default-bg-color:           var(--vl-bg);
  --md-default-bg-color--light:    var(--vl-surface);
  --md-default-bg-color--lighter:  var(--vl-elevated);
  --md-default-bg-color--lightest: #eeeeee;

  --md-default-fg-color:           var(--vl-text);
  --md-default-fg-color--light:    rgba(17,17,17,0.7);
  --md-default-fg-color--lighter:  var(--vl-text-2);
  --md-default-fg-color--lightest: var(--vl-text-3);

  --md-primary-fg-color:           #000000;
  --md-primary-fg-color--light:    rgba(0,0,0,0.54);
  --md-primary-fg-color--dark:     #000000;
  --md-primary-bg-color:           #ffffff;
  --md-primary-bg-color--light:    rgba(0,0,0,0.07);

  --md-accent-fg-color:            #000000;
  --md-accent-fg-color--transparent: rgba(0,0,0,0.1);
  --md-accent-bg-color:            #000000;
  --md-accent-bg-color--light:     rgba(0,0,0,0.1);

  --md-code-bg-color:              #f4f4f5;
  --md-code-fg-color:              #111111;
  --md-code-hl-color:              rgba(0,0,0,0.06);

  --md-typeset-a-color:            #000000;
  --md-typeset-mark-color:         rgba(0,0,0,0.1);
  --md-typeset-kbd-color:          var(--vl-surface);
  --md-typeset-kbd-border-color:   var(--vl-border-hi);
  --md-typeset-table-color:        var(--vl-border);
  --md-typeset-table-color--light: var(--vl-border);

  --md-admonition-bg-color:        var(--vl-surface);
  --md-admonition-fg-color:        var(--vl-text);

  --md-footer-bg-color:            #ffffff;
  --md-footer-bg-color--dark:      #fafafa;
  --md-footer-fg-color:            rgba(0,0,0,0.65);
  --md-footer-fg-color--light:     rgba(0,0,0,0.42);
  --md-footer-fg-color--lighter:   rgba(0,0,0,0.28);

  --md-shadow-z1: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.06);
  --md-shadow-z2: 0 4px 6px rgba(0,0,0,0.07);
  --md-shadow-z3: 0 10px 15px rgba(0,0,0,0.08);
}

/* ── GLOBAL ── */
body {
  font-family: var(--vl-sans) !important;
  background-color: var(--vl-bg) !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code, pre, kbd, samp {
  font-family: var(--vl-mono) !important;
}

/* ── HEADER ── White bar */
.md-header {
  background-color: #ffffff !important;
  border-bottom: 1px solid var(--vl-border) !important;
  box-shadow: none !important;
}

.md-header[data-md-state="shadow"] {
  box-shadow: 0 1px 0 var(--vl-border) !important;
}

.md-header__inner {
  padding: 0 20px;
}

.md-header__title {
  font-family: var(--vl-sans) !important;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.02em;
  color: #000000 !important;
}

.md-header__button.md-icon {
  color: var(--vl-text-2) !important;
}

.md-header__button.md-icon:hover {
  color: var(--vl-text) !important;
  background-color: var(--vl-elevated);
  border-radius: 6px;
}

/* ── NAVIGATION TABS ── */
.md-tabs {
  background-color: #ffffff !important;
  border-bottom: 1px solid var(--vl-border) !important;
  box-shadow: none !important;
}

.md-tabs__list {
  padding: 0 12px;
}

.md-tabs__link {
  font-family: var(--vl-sans) !important;
  font-size: 13px !important;
  color: var(--vl-text-2) !important;
  opacity: 1 !important;
  padding: 0 10px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}

.md-tabs__link:hover {
  color: var(--vl-text) !important;
  background: var(--vl-elevated);
}

.md-tabs__link--active {
  color: #000000 !important;
  font-weight: 500;
}

.md-tabs__indicator {
  background-color: #000000 !important;
  height: 1px !important;
}

/* ── SEARCH ── */
.md-search__form {
  background-color: var(--vl-elevated) !important;
  border: 1px solid var(--vl-border-hi) !important;
  border-radius: 6px !important;
  box-shadow: none !important;
}

.md-search__form:focus-within {
  border-color: rgba(0,0,0,0.3) !important;
}

.md-search__input {
  font-family: var(--vl-sans) !important;
  font-size: 14px;
  color: var(--vl-text) !important;
}

.md-search__input::placeholder {
  color: var(--vl-text-3) !important;
}

.md-search__icon {
  color: var(--vl-text-2) !important;
}

.md-search-result {
  background-color: #ffffff !important;
  border: 1px solid var(--vl-border) !important;
  border-radius: 8px !important;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12) !important;
}

.md-search-result__meta {
  background-color: var(--vl-surface) !important;
  color: var(--vl-text-2) !important;
  font-family: var(--vl-sans);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--vl-border);
}

.md-search-result__item {
  border-bottom: 1px solid var(--vl-border) !important;
}

.md-search-result__title {
  font-family: var(--vl-sans) !important;
  font-size: 14px;
  font-weight: 500;
  color: var(--vl-text) !important;
}

.md-search-result__teaser {
  color: var(--vl-text-2) !important;
  font-size: 13px;
}

/* ── SIDEBAR ── */
.md-sidebar {
  background-color: var(--vl-surface);
}

.md-sidebar--primary .md-sidebar__inner {
  border-right: 1px solid var(--vl-border);
  padding: 16px 0;
}

.md-sidebar--secondary .md-sidebar__inner {
  border-left: 1px solid var(--vl-border);
  padding: 16px 0;
}

.md-nav__title {
  font-family: var(--vl-sans) !important;
  font-size: 10px !important;
  font-weight: 600 !important;
  letter-spacing: 0.1em !important;
  color: var(--vl-text-3) !important;
  text-transform: uppercase;
  padding: 10px 12px 6px;
  background: transparent !important;
  box-shadow: none !important;
  border-bottom: none !important;
}

.md-nav__item {
  padding: 0 8px;
}

.md-nav__link {
  font-family: var(--vl-sans) !important;
  font-size: 13px !important;
  color: var(--vl-text-2) !important;
  border-radius: 6px;
  padding: 5px 8px !important;
  margin: 1px 0;
  transition: color 0.15s, background 0.15s;
}

.md-nav__link:hover {
  color: var(--vl-text) !important;
  background: rgba(0,0,0,0.05);
}

.md-nav__link--active,
.md-nav__link--active:focus,
.md-nav__link--active:hover {
  color: #000000 !important;
  font-weight: 600;
  background: rgba(0,0,0,0.06);
}

.md-nav__icon {
  color: var(--vl-text-3) !important;
}

/* TOC (right sidebar) */
.md-nav--secondary .md-nav__link {
  font-size: 12px !important;
}

.md-nav--secondary .md-nav__link--active {
  color: #000000 !important;
  background: transparent;
  border-left: 2px solid #000000;
  padding-left: 6px !important;
  font-weight: 600;
  border-radius: 0;
}

/* ── MAIN CONTENT AREA ── */
.md-main {
  background-color: var(--vl-bg);
}

.md-content {
  background-color: var(--vl-bg);
}

.md-content__inner {
  padding: 32px 28px 56px;
  max-width: 820px;
}

/* ── TYPOGRAPHY ── */
.md-typeset {
  font-family: var(--vl-sans) !important;
  color: var(--vl-text);
  font-size: 15px;
  line-height: 1.72;
}

.md-typeset h1 {
  font-family: var(--vl-sans) !important;
  font-size: 2.1em;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--vl-text);
  border-bottom: 1px solid var(--vl-border);
  padding-bottom: 18px;
  margin-bottom: 32px;
  margin-top: 0;
}

.md-typeset h2 {
  font-family: var(--vl-sans) !important;
  font-size: 1.42em;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--vl-text);
  border-bottom: 1px solid var(--vl-border);
  padding-bottom: 10px;
  margin-top: 52px;
  margin-bottom: 18px;
}

.md-typeset h3 {
  font-family: var(--vl-sans) !important;
  font-size: 1.08em;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--vl-text);
  margin-top: 36px;
  margin-bottom: 10px;
}

.md-typeset h4 {
  font-family: var(--vl-sans) !important;
  font-size: 0.9em;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--vl-text-2);
  margin-top: 28px;
}

.md-typeset p {
  color: var(--vl-text-2);
  margin-bottom: 16px;
}

.md-typeset h1 + p,
.md-typeset h2 + p {
  color: var(--vl-text);
}

.md-typeset strong {
  color: var(--vl-text);
  font-weight: 600;
}

.md-typeset em {
  color: var(--vl-text);
}

.md-typeset a {
  color: var(--vl-text) !important;
  text-decoration: underline;
  text-decoration-color: var(--vl-border-hi);
  text-underline-offset: 3px;
  transition: color 0.15s, text-decoration-color 0.15s;
  font-weight: 500;
}

.md-typeset a:hover {
  color: #000000 !important;
  text-decoration-color: rgba(0,0,0,0.5);
}

/* ── INLINE CODE ── */
.md-typeset :not(pre) > code {
  background-color: var(--vl-elevated) !important;
  border: 1px solid var(--vl-border-hi);
  border-radius: 4px;
  padding: 2px 7px;
  font-size: 0.875em;
  color: var(--vl-text) !important;
  font-family: var(--vl-mono) !important;
}

/* ── CODE BLOCKS ── */
.md-typeset pre {
  background-color: var(--vl-elevated) !important;
  border: 1px solid var(--vl-border) !important;
  border-radius: 8px !important;
  overflow: hidden;
  box-shadow: none !important;
}

.md-typeset pre > code {
  background: none !important;
  border: none !important;
  padding: 16px 20px !important;
  font-size: 0.845em !important;
  line-height: 1.65;
  font-family: var(--vl-mono) !important;
  color: var(--vl-text) !important;
}

.md-typeset .highlight {
  background-color: var(--vl-elevated) !important;
}

.md-typeset .highlight pre {
  margin: 0;
  border: none !important;
  background: none !important;
}

/* Code block filename */
.md-typeset .highlight .filename {
  background-color: #ececec !important;
  border-bottom: 1px solid var(--vl-border) !important;
  color: var(--vl-text-2);
  font-family: var(--vl-mono) !important;
  font-size: 0.8em;
  padding: 8px 16px;
}

/* Code copy button */
.md-clipboard {
  color: var(--vl-text-3) !important;
  border-radius: 4px;
}

.md-clipboard:hover {
  color: var(--vl-text) !important;
  background: rgba(0,0,0,0.06);
}

/* Syntax highlighting — readable on light bg */
.md-typeset .highlight .hll { background: rgba(0,0,0,0.06); }
.md-typeset .highlight .c,
.md-typeset .highlight .cm,
.md-typeset .highlight .c1  { color: #999999; font-style: italic; }
.md-typeset .highlight .k,
.md-typeset .highlight .kd,
.md-typeset .highlight .kn  { color: #555555; font-weight: 600; }
.md-typeset .highlight .s,
.md-typeset .highlight .s1,
.md-typeset .highlight .s2  { color: #444444; }
.md-typeset .highlight .nf  { color: #111111; font-weight: 600; }
.md-typeset .highlight .nb  { color: #333333; }
.md-typeset .highlight .mi,
.md-typeset .highlight .mf  { color: #333333; }
.md-typeset .highlight .o   { color: #666666; }

/* ── TABLES ── */
.md-typeset table:not([class]) {
  border: 1px solid var(--vl-border) !important;
  border-radius: 8px;
  overflow: hidden;
  border-spacing: 0;
  box-shadow: none !important;
  width: 100%;
}

.md-typeset table:not([class]) th {
  background-color: var(--vl-surface) !important;
  color: var(--vl-text-2) !important;
  font-family: var(--vl-sans) !important;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--vl-border-hi) !important;
  padding: 10px 16px !important;
}

.md-typeset table:not([class]) td {
  border-bottom: 1px solid var(--vl-border) !important;
  color: var(--vl-text-2) !important;
  padding: 9px 16px !important;
  font-size: 14px;
  font-family: var(--vl-sans) !important;
}

.md-typeset table:not([class]) td strong {
  color: var(--vl-text);
}

.md-typeset table:not([class]) tr:last-child td {
  border-bottom: none !important;
}

.md-typeset table:not([class]) tr:hover td {
  background-color: var(--vl-surface);
}

/* ── ADMONITIONS / CALLOUTS ── */
.md-typeset .admonition,
.md-typeset details {
  background-color: var(--vl-surface) !important;
  border: 1px solid var(--vl-border) !important;
  border-left-width: 3px !important;
  border-radius: 8px;
  box-shadow: none !important;
}

.md-typeset .admonition-title,
.md-typeset summary {
  background-color: transparent !important;
  border-bottom: 1px solid var(--vl-border);
  color: var(--vl-text) !important;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--vl-sans) !important;
  padding: 10px 14px !important;
}

.md-typeset .admonition p,
.md-typeset details p {
  color: var(--vl-text-2);
  padding: 4px 14px 12px;
  margin: 0;
}

.md-typeset .admonition.note   { border-left-color: #888888 !important; }
.md-typeset .admonition.info   { border-left-color: #444444 !important; }
.md-typeset .admonition.warning { border-left-color: #c9a227 !important; }
.md-typeset .admonition.danger  { border-left-color: #c0392b !important; }
.md-typeset .admonition.tip,
.md-typeset .admonition.success { border-left-color: #27ae60 !important; }

/* ── LISTS ── */
.md-typeset ul li,
.md-typeset ol li {
  color: var(--vl-text-2);
  margin-bottom: 4px;
}

.md-typeset ul li::marker {
  color: var(--vl-text-3);
}

.md-typeset li strong {
  color: var(--vl-text);
}

/* ── BLOCKQUOTES ── */
.md-typeset blockquote {
  border-left: 3px solid var(--vl-border-hi);
  background: var(--vl-surface);
  border-radius: 0 6px 6px 0;
  padding: 12px 16px;
  margin: 16px 0;
}

.md-typeset blockquote p {
  color: var(--vl-text-2);
  margin: 0;
}

/* ── HORIZONTAL RULE ── */
.md-typeset hr {
  border: none;
  border-top: 1px solid var(--vl-border);
  margin: 36px 0;
}

/* ── FOOTER ── White footer */
.md-footer {
  background-color: #ffffff !important;
  border-top: 1px solid var(--vl-border);
}

.md-footer-meta {
  background-color: var(--vl-surface) !important;
  border-top: 1px solid var(--vl-border);
}

.md-footer-meta__inner {
  padding: 12px 20px;
}

.md-footer__link {
  color: var(--vl-text-2) !important;
  transition: color 0.15s;
}

.md-footer__link:hover {
  color: var(--vl-text) !important;
}

.md-footer__title {
  font-family: var(--vl-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--vl-text);
}

.md-footer__direction {
  font-size: 11px;
  color: var(--vl-text-3) !important;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ── SCROLL TO TOP ── */
.md-top {
  background-color: #ffffff !important;
  border: 1px solid var(--vl-border-hi) !important;
  color: var(--vl-text-2) !important;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08) !important;
  border-radius: 128px !important;
}

.md-top:hover {
  color: var(--vl-text) !important;
}

/* ── TAGS ── */
.md-tag {
  background-color: var(--vl-elevated) !important;
  border: 1px solid var(--vl-border-hi) !important;
  color: var(--vl-text-2) !important;
  border-radius: 128px !important;
  font-family: var(--vl-sans) !important;
  font-size: 11px;
}

/* ── MKDOCSTRINGS API DOCS ── */
.doc-heading {
  font-family: var(--vl-sans) !important;
  font-weight: 600;
  color: var(--vl-text) !important;
}

.doc-label {
  background-color: var(--vl-elevated) !important;
  border: 1px solid var(--vl-border-hi) !important;
  border-radius: 4px;
  color: var(--vl-text-2) !important;
  font-family: var(--vl-mono) !important;
  font-size: 11px;
}

.doc-signature {
  background-color: var(--vl-elevated) !important;
  border: 1px solid var(--vl-border) !important;
  border-radius: 8px;
  padding: 12px 16px !important;
  font-family: var(--vl-mono) !important;
  color: var(--vl-text) !important;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(0,0,0,0.15);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(0,0,0,0.3);
}