/* "What Would Dr. Sproul Say?" — restyled to match idiogenicosmoles.com:
   a cool-blue palette with a cobalt accent, serif headlines over Inter sans,
   soft white cards, rounded corners, and gentle shadows. */
@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,600;0,8..60,700;1,8..60,400&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg:          #F4F7FC;
  --bg-deep:     #E6EEF9;
  --surface:     #FFFFFF;
  --surface-alt: #F8FAFE;
  --border:      #DCE5F2;
  --border-soft: #E8EEF7;

  --ink:         #0A1A3E;
  --ink-soft:    #1F2D5A;
  --muted:       #5A6A8A;
  --faint:       #93A0BB;

  --accent:      #1B5FCF;
  --accent-hover:#1850B8;
  --accent-soft: rgba(27, 95, 207, 0.10);
  --accent-line: rgba(27, 95, 207, 0.30);
  --cyan:        #5BC9F4;

  --radius:      14px;
  --radius-sm:   8px;

  --shadow-sm:   0 1px 2px rgba(10, 26, 62, 0.05);
  --shadow:      0 1px 3px rgba(10, 26, 62, 0.07), 0 1px 2px rgba(10, 26, 62, 0.05);
  --shadow-lg:   0 12px 32px rgba(10, 26, 62, 0.10), 0 4px 10px rgba(10, 26, 62, 0.05);

  --font-serif:  "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-sans:   "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
                 system-ui, sans-serif;
}

/* custom color scheme (set via mkdocs.yml palette: scheme: reverent) */
[data-md-color-scheme="reverent"] {
  --md-default-bg-color:          var(--bg);
  --md-default-fg-color:          var(--ink);
  --md-default-fg-color--light:   var(--muted);
  --md-default-fg-color--lighter: var(--faint);
  --md-default-fg-color--lightest: rgba(10, 26, 62, 0.07);
  --md-primary-fg-color:          var(--ink);
  --md-primary-bg-color:          #ffffff;
  --md-accent-fg-color:           var(--accent);
  --md-typeset-color:             var(--ink);
  --md-typeset-a-color:           var(--accent);
  --md-code-bg-color:             #eef2fa;
  --md-footer-bg-color:           var(--ink);
}

/* ---- typography ---- */
body, .md-typeset {
  font-family: var(--font-sans);
  font-size: 1.0rem;
  line-height: 1.7;
  color: var(--ink);
}
.md-typeset h1, .md-typeset h2, .md-typeset h3, .md-typeset h4 {
  font-family: var(--font-serif);
  color: var(--ink);
  letter-spacing: -.01em;
}
.md-typeset h1 {
  font-size: 2.3rem; font-weight: 700; line-height: 1.12; margin-bottom: .35em;
}
.md-typeset h2 {
  font-size: 1.6rem; font-weight: 600; margin-top: 2em;
  padding-bottom: .3em; border-bottom: 1px solid var(--border);
}
.md-typeset h3 { font-size: 1.25rem; font-weight: 600; color: var(--ink-soft); }

/* comfortable reading measure */
.md-content { max-width: 50rem; margin: 0 auto; }
.md-grid { max-width: 78rem; }

/* ---- header: a light top bar, like the idiogenicosmoles nav ---- */
.md-header {
  background: var(--surface); color: var(--ink);
  box-shadow: 0 1px 0 var(--border);
}
.md-header__title { font-family: var(--font-serif); font-weight: 600; font-size: 1.2rem; color: var(--ink); }
.md-header__button { color: var(--ink); }
.md-search__form { background: var(--surface-alt); border: 1px solid var(--border); border-radius: var(--radius-pill, 999px); }
.md-search__input { color: var(--ink); }
.md-search__input::placeholder { color: var(--faint); }

/* ---- links ---- */
.md-typeset a { color: var(--accent); text-decoration: none; }
.md-typeset a:hover { color: var(--accent-hover); text-decoration: underline; }

/* ---- the quotes: white cards with a cobalt accent ---- */
.md-typeset blockquote {
  border-left: 3px solid var(--accent);
  background: var(--surface);
  color: var(--ink-soft);
  margin: 1.2em 0; padding: .85em 1.15em;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  box-shadow: var(--shadow-sm);
}
.md-typeset blockquote p { margin: .25em 0; }
/* index disclaimer reads as a quiet preface */
.md-typeset blockquote:first-of-type {
  font-size: .82rem; line-height: 1.6; color: var(--muted);
  background: var(--surface-alt); border-left-color: var(--accent-line);
  box-shadow: none;
}
.md-typeset p > strong:first-child { color: var(--ink); }
/* front-page rationale ("Why did we make this?") — a notch smaller than body */
.md-typeset .why-made {
  font-size: .9rem; line-height: 1.65; color: var(--muted); margin: 1.1em 0 1.4em;
}
.md-typeset .why-made strong { color: var(--ink); }
.md-typeset small { color: var(--muted); font-size: .8rem; }

/* ---- tables: soft cards ---- */
.md-typeset table:not([class]) {
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-sm); font-size: .92rem;
}
.md-typeset table:not([class]) th {
  background: var(--surface-alt); color: var(--ink); font-weight: 600;
}
.md-typeset table:not([class]) td,
.md-typeset table:not([class]) th { border: none; border-bottom: 1px solid var(--border-soft); }
.md-typeset table:not([class]) tr:hover td { background: var(--surface-alt); }
.md-typeset hr { border-bottom: 1px solid var(--border); }

/* ---- prominent home-page search box ---- */
.home-search {
  margin: 1.6rem 0 2.4rem; padding: 1.25rem 1.35rem 1.15rem;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); box-shadow: var(--shadow);
}
.home-search__label {
  font-family: var(--font-serif); font-weight: 600; font-size: 1.45rem;
  color: var(--ink); margin-bottom: .6rem; line-height: 1.1;
}
.home-search input[type="search"] {
  width: 100%; box-sizing: border-box; font-family: var(--font-sans);
  padding: .85em 1em; font-size: 1.12rem; color: var(--ink);
  background: var(--surface); border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); transition: border-color .15s, box-shadow .15s;
}
.home-search input[type="search"]:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}
.home-search #hs-status { margin: .7em 0 .2em; color: var(--muted); font-size: .9rem; }
.home-search .hs-item { margin: 1.15em 0; padding-bottom: .95em; border-bottom: 1px solid var(--border-soft); }
.home-search blockquote { margin: .4em 0; }

/* ======================================================================
   Left navigation.
   Desktop sidebar (>=76.25em): three distinct tinted cards — primary links,
     "About this index", and "Topics".
   Mobile drawer (<76.25em): a plain, standard list (Bootstrap list-group
     look) — defined in the mobile block lower down. No custom boxes there.
   ====================================================================== */
.md-nav { font-family: var(--font-sans); }
.md-nav__title { font-family: var(--font-serif); color: var(--ink); font-size: 1.15rem; }

@media screen and (min-width: 76.25em) {
  .md-nav--primary .md-nav__link {
    font-size: .85rem; line-height: 1.4;
    padding: .24rem 0; color: var(--ink-soft);
    border-radius: 0; transition: color .12s ease;
  }
  .md-nav--primary .md-nav__link:hover { color: var(--accent); }
  .md-nav--primary .md-nav__link--active { color: var(--accent); font-weight: 600; }

  /* Group 1: the primary links (Home / Search / Use it in your AI) */
  .md-nav--primary > .md-nav__list > .md-nav__item:not(.md-nav__item--section) {
    background: var(--accent-soft);
    margin: 0 .5rem; padding: 0 .7rem;
    border-left: 1px solid var(--border); border-right: 1px solid var(--border);
  }
  .md-nav--primary > .md-nav__list > .md-nav__item:not(.md-nav__item--section):first-child {
    margin-top: .6rem; padding-top: .35rem;
    border-top: 1px solid var(--border); border-radius: var(--radius) var(--radius) 0 0;
  }
  .md-nav--primary > .md-nav__list > .md-nav__item:not(.md-nav__item--section):has(+ .md-nav__item--section) {
    padding-bottom: .35rem; margin-bottom: .9rem;
    border-bottom: 1px solid var(--border); border-radius: 0 0 var(--radius) var(--radius);
  }
  /* primary links: flush rows, each with a hover/active fill + cobalt stripe */
  .md-nav--primary > .md-nav__list > .md-nav__item:not(.md-nav__item--section) > .md-nav__link {
    margin: 0 -.7rem; padding: .5rem .7rem;
    font-size: .95rem; font-weight: 600; color: var(--ink);
    border-left: 3px solid transparent; border-radius: 0;
    transition: background .12s ease, color .12s ease, border-color .12s ease;
  }
  .md-nav--primary > .md-nav__list > .md-nav__item:not(.md-nav__item--section):not(:first-child) > .md-nav__link {
    border-top: 1px solid var(--border);
  }
  .md-nav--primary > .md-nav__list > .md-nav__item:not(.md-nav__item--section) > .md-nav__link:hover,
  .md-nav--primary > .md-nav__list > .md-nav__item:not(.md-nav__item--section) > .md-nav__link--active {
    background: var(--surface); color: var(--accent); border-left-color: var(--accent);
  }
  .md-nav--primary > .md-nav__list > .md-nav__item:not(.md-nav__item--section) > .md-nav__link--active {
    font-weight: 700;
  }
}

/* ---- review queue: collapsible per-topic groups ---- */
.md-typeset details.review-group {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); box-shadow: var(--shadow-sm);
  margin: .55rem 0; padding: 0;
}
.md-typeset details.review-group > summary {
  font-family: var(--font-sans); font-weight: 600; font-size: 1.0rem;
  color: var(--ink); cursor: pointer; list-style: none;
  padding: .7rem .9rem; display: flex; align-items: center; gap: .6rem;
  border-radius: var(--radius-sm);
}
.md-typeset details.review-group[open] > summary {
  border-bottom: 1px solid var(--border-soft);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}
.md-typeset details.review-group > summary::-webkit-details-marker { display: none; }
.md-typeset details.review-group > summary::before {
  content: "▸"; color: var(--accent); font-size: .85em; transition: transform .12s ease;
}
.md-typeset details.review-group[open] > summary::before { transform: rotate(90deg); }
.md-typeset details.review-group > summary:hover { color: var(--accent); }
.md-typeset .rq-count {
  margin-left: auto; font-size: .78rem; font-weight: 700; color: var(--muted);
  background: var(--accent-soft); border-radius: 999px; padding: .08em .6em;
}
.md-typeset details.review-group > ul { margin: .6rem .9rem 1rem; }

/* ---- Desktop sidebar: Groups 2 & 3 as tinted cards; inert section headers ---- */
@media screen and (min-width: 76.25em) {
  .md-nav--primary > .md-nav__list > .md-nav__item--section {
    margin: 0 .5rem 1rem; padding: .55rem .7rem .6rem;
    border: 1px solid var(--border); border-radius: var(--radius);
    background: #ECF1F8;                       /* Group 2: "About this index" */
  }
  .md-nav--primary > .md-nav__list > .md-nav__item--section:last-child {
    background: var(--surface);                /* Group 3: "Topics" (white)   */
  }
  .md-nav--primary .md-nav__item--section > .md-nav__link,
  .md-nav--primary .md-nav__item--section > label.md-nav__link {
    text-transform: uppercase; letter-spacing: .07em;
    font-size: .7rem; font-weight: 700; color: var(--muted);
    margin: 0 0 .45rem; padding: 0 0 .35rem;
    border-bottom: 1px solid var(--border);
    pointer-events: none; cursor: default;     /* tree is always expanded here */
  }
  .md-nav--primary .md-nav__icon { display: none; }   /* no chevrons on desktop */
}

/* ======================================================================
   Mobile drawer (<76.25em): a plain, standard list — a Bootstrap "list-group"
   look. Full-width tappable rows, hairline dividers, a muted group label for
   each section, and a solid-blue active row. No tinted cards or custom boxes;
   Material's own sliding-drawer behavior (tap a section to open its links) is
   left fully intact.
   ====================================================================== */
@media screen and (max-width: 76.1875em) {
  .md-nav--primary .md-nav__list { padding: 0; }
  .md-nav--primary .md-nav__item { border-bottom: 1px solid var(--border); }
  .md-nav--primary .md-nav__link {
    padding: .85rem 1rem; font-size: 1rem; line-height: 1.4;
    color: var(--ink); border-radius: 0;
  }
  .md-nav--primary .md-nav__link:hover { background: var(--surface-alt); color: var(--accent); }
  .md-nav--primary .md-nav__link--active {
    background: var(--accent); color: #fff; font-weight: 600;
  }
  /* section headers: a standard muted group label, lightly shaded */
  .md-nav--primary .md-nav__item--section > .md-nav__link,
  .md-nav--primary .md-nav__item--section > label.md-nav__link {
    text-transform: uppercase; letter-spacing: .04em;
    font-size: .8rem; font-weight: 700; color: var(--muted);
    background: var(--bg-deep);
  }
}

/* ---- footer ---- */
.md-footer-meta { background: var(--ink); }
.md-copyright a { color: var(--cyan); text-decoration: none; }
.md-copyright a:hover { color: #fff; text-decoration: underline; }

/* ======================================================================
   Mobile: tighten horizontal whitespace and stop any overflow so the page
   fits a phone screen without side-scroll.
   ====================================================================== */
@media screen and (max-width: 44.9375em) {
  body, .md-typeset { font-size: .95rem; }
  /* slim the page gutters */
  .md-content__inner { margin: 0 .55rem 1.1rem; }
  .md-content__inner > :first-child { margin-top: .4rem; }
  .md-typeset h1 { font-size: 1.85rem; }
  .md-typeset h2 { font-size: 1.35rem; margin-top: 1.4em; }

  /* long quotes / words must wrap, never push the page wide */
  .md-typeset, .md-typeset blockquote, .md-typeset li, .home-search { overflow-wrap: anywhere; }
  .md-typeset blockquote { padding: .6em .8em; margin: .9em 0; }

  /* the home search box: less padding, edge-to-edge feel */
  .home-search { margin: 1.1rem 0 1.6rem; padding: .9rem 1rem; }
  .home-search__label { font-size: 1.2rem; }
  .home-search input[type="search"] { font-size: 1rem; padding: .7em .8em; }

  /* tables: let them scroll inside their own card instead of widening the page */
  .md-typeset table:not([class]) { display: block; overflow-x: auto; font-size: .88rem; }

  /* review-queue groups: tighter */
  .md-typeset details.review-group > summary { padding: .6rem .75rem; font-size: .95rem; }
  .md-typeset details.review-group > ul { margin: .5rem .75rem .8rem; }
}