/* =========================================================================
   CUNEF brand theme for Material for MkDocs.
   Primary/accent = CUNEF orange, tuned for both light and dark schemes.
   ========================================================================= */

:root {
  --cunef-orange: #ec6607;        /* CUNEF orange */
  --cunef-orange-dark: #c4530a;
  --cunef-orange-light: #ff8a3d;
  --cunef-ink: #1b2733;

  /* Canonical difficulty-level palette — the SINGLE source of truth for level
     colours across the site (chips, matrix, overview badges, dependency graph).
     Do not hard-code these hexes elsewhere; reference the token instead.
     `--level-intermediate-ink` is a darker gold used only where the yellow
     appears as TEXT/border (the fill yellow is illegible as small text). */
  --level-base: #2e7d32;
  --level-beginner: #1e88e5;
  --level-intermediate: #f9a825;
  --level-intermediate-ink: #8a6d00;
  --level-advanced: #e53935;
  --level-expert: #6a1b9a;
}

/* ---- Light scheme ---- */
[data-md-color-scheme="default"] {
  --md-primary-fg-color: var(--cunef-orange);
  --md-primary-fg-color--light: var(--cunef-orange-light);
  --md-primary-fg-color--dark: var(--cunef-orange-dark);
  --md-primary-bg-color: #ffffff;
  --md-accent-fg-color: var(--cunef-orange-dark);
  --md-typeset-a-color: var(--cunef-orange-dark);
}

/* ---- Dark scheme ---- */
[data-md-color-scheme="slate"] {
  --md-primary-fg-color: var(--cunef-orange);
  --md-primary-fg-color--light: var(--cunef-orange-light);
  --md-primary-fg-color--dark: var(--cunef-orange-dark);
  --md-accent-fg-color: var(--cunef-orange-light);
  --md-typeset-a-color: var(--cunef-orange-light);
}

/* =========================================================================
   Layout: wider main content, slimmer side columns (nav + table of contents)
   ========================================================================= */
.md-grid { max-width: 74rem; }              /* Material default is 61rem */
@media screen and (min-width: 76.25em) {
  .md-sidebar--primary { width: 11rem; }    /* left nav   (default 12.1rem) */
  .md-sidebar--secondary { width: 9rem; }   /* right ToC  (default 12.1rem) */
}

/* Sticky tabs a touch bolder */
.md-tabs__link { font-weight: 600; opacity: 0.9; }
.md-tabs__link--active { opacity: 1; }

/* =========================================================================
   Header hover dropdowns (overrides/partials/tabs.html)
   TODO(nav-dropdown): hover reveal is unreliable live; click-to-open is parked
   (see assets/js/nav-dropdown.js). Tabs navigate to their index page meanwhile.
   ========================================================================= */
/* Let the menus escape the tab bar (Material clips these by default) */
.md-header,
.md-header__inner,
.md-tabs,
.md-tabs .md-grid,
.md-tabs__list,
.md-tabs__item { overflow: visible !important; }
/* Keep the tab bar BELOW the header (z-index 4) so the language selector
   dropdown, which lives in the header, is not covered by the tabs. */
.md-tabs { position: relative; z-index: 3; }
.md-tabs__item.cunef-has-menu { position: relative; }

/* caret on items that have a menu */
.cunef-has-menu > .md-tabs__link::after {
  content: "▾";
  display: inline-block;
  font-size: 0.6rem;
  margin-left: 0.3rem;
  vertical-align: middle;
  transition: transform 0.15s ease;
}
.cunef-has-menu.cunef-open > .md-tabs__link::after { transform: rotate(180deg); }

/* first-level menu */
.cunef-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 15rem;
  margin: 0;
  padding: 0.3rem 0;
  list-style: none;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  border-radius: 0.3rem;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.22);
  z-index: 100;
}
/* Opened by click (see assets/js/nav-dropdown.js). Hover kept as a bonus. */
.cunef-has-menu.cunef-open > .cunef-menu,
.cunef-has-menu:hover > .cunef-menu,
.cunef-has-menu:focus-within > .cunef-menu { display: block; }
.cunef-menu__index { font-weight: 700; }

.cunef-menu li { position: relative; margin: 0; }
.cunef-menu__link,
.cunef-menu__label {
  display: block;
  padding: 0.42rem 0.9rem;
  font-size: 0.72rem;
  line-height: 1.3;
  white-space: nowrap;
  color: var(--md-default-fg-color);
  cursor: pointer;
}
.cunef-menu__link:hover,
.cunef-menu__group:hover > .cunef-menu__label {
  background: var(--md-default-fg-color--lightest);
  color: var(--md-primary-fg-color);
}
/* level rows get a right-caret to signal the fly-out */
.cunef-menu__group > .cunef-menu__label::after {
  content: "▸";
  float: right;
  opacity: 0.7;
  margin-left: 0.6rem;
}

/* second-level fly-out */
.cunef-submenu {
  display: none;
  position: absolute;
  left: 100%;
  top: -0.3rem;
  min-width: 15rem;
  margin: 0;
  padding: 0.3rem 0;
  list-style: none;
  background: var(--md-default-bg-color);
  border-radius: 0.3rem;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.22);
}
.cunef-menu__group.cunef-subopen > .cunef-submenu,
.cunef-menu__group:hover > .cunef-submenu { display: block; }

/* Hover menus are a desktop affordance; on small screens Material uses the
   drawer, where the tab bar isn't shown anyway. */
@media screen and (max-width: 76.1875em) {
  .cunef-menu, .cunef-submenu { display: none !important; }
}

/* =========================================================================
   Home hero
   ========================================================================= */
.hero {
  text-align: center;
  padding: 2.2rem 1rem 1rem;
}
.hero img.hero-logo {
  max-width: 340px;
  width: 70%;
  height: auto;
  margin: 0 auto 1rem;
}
.hero h1 {
  font-weight: 800;
  margin: 0.2rem 0 0.4rem;
  border-bottom: none;        /* the hero title is centred; no section rule */
  padding-bottom: 0;
}
.hero .hero-tagline {
  font-size: 1.05rem;
  max-width: 40rem;
  margin: 0 auto 1.4rem;
  color: var(--md-default-fg-color--light);
}
.hero .md-button { margin: 0.2rem 0.3rem; }

/* =========================================================================
   Page headings: bold titles, with a horizontal rule under the page title (h1)
   and under each section heading (h2) so sections read as clearly separated.
   ========================================================================= */
.md-typeset h1 {
  font-weight: 700;
  color: var(--md-default-fg-color);          /* Material dims h1 by default */
  border-bottom: 2px solid var(--md-primary-fg-color);   /* CUNEF orange accent */
  padding-bottom: 0.3rem;
  margin-bottom: 1.2rem;
}
.md-typeset h2 {
  font-weight: 700;
  border-bottom: 1px solid var(--md-default-fg-color--lighter);
  padding-bottom: 0.25rem;
  margin-top: 2.2rem;
}
.md-typeset h3 { font-weight: 700; }

/* =========================================================================
   Grid cards: level accent stripe + hover lift
   ========================================================================= */
.md-typeset .grid.cards > ul > li,
.md-typeset .grid > .card {
  border-radius: 0.5rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  border-top: 3px solid var(--cunef-orange);
}
.md-typeset .grid.cards > ul > li:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
  border-top-color: var(--cunef-orange-dark);
}

/* =========================================================================
   Contest cards (home)
   ========================================================================= */
.md-typeset .contest-grid > ul > li { text-align: center; }
.md-typeset img.contest-logo {
  background: #ffffff;                 /* keep transparent logos visible in dark mode */
  border-radius: 0.5rem;
  padding: 0.7rem 0.9rem;
  height: 96px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  display: block;
  margin: 0.2rem auto 0.9rem;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}
.md-typeset .contest-grid .md-button { margin-top: 0.4rem; }

/* Authors */
.md-typeset .authors { list-style: none; padding-left: 0; }
.md-typeset .authors li { margin: 0.2rem 0; }

/* =========================================================================
   Shared filter chips (catalog.js) — used by the graph and the tables
   ========================================================================= */
.md-typeset .cat-filters { display: flex; flex-wrap: wrap; gap: 0.5rem 1.1rem; align-items: center; margin: 0.5rem 0; }
.cat-fgroup { display: flex; flex-wrap: wrap; gap: 0.3rem; align-items: center; }
.cat-fgroup__title { font-size: 0.68rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; opacity: 0.6; margin-right: 0.15rem; }
.cat-chip {
  border: 1px solid var(--md-default-fg-color--lighter);
  background: transparent;
  color: var(--md-default-fg-color--light);
  border-radius: 1rem; padding: 0.12rem 0.6rem;
  font-size: 0.72rem; line-height: 1.4; cursor: pointer; opacity: 0.5;
  transition: opacity 0.12s ease, background 0.12s ease;
}
.cat-chip:hover { opacity: 0.85; }
.cat-chip.is-active { opacity: 1; font-weight: 700; }
/* "Todos / Ninguno" bulk buttons: distinct, no active state */
.cat-chip--bulk { opacity: 0.9; font-size: 0.66rem; border-style: dashed; }
.cat-chip--bulk:hover { opacity: 1; background: var(--md-default-fg-color--lightest); }
/* "En construcción" toggle */
.cat-chip--wip.is-active { background: #9e9e9e33; border-color: #757575; }

/* =========================================================================
   Work-in-progress (wip) elements: dashed shape borders + crane marker
   ========================================================================= */
.md-typeset .cat-badge.cat-badge--wip { border: 1.5px dashed currentColor; }
.md-typeset .ov-row--wip .ov-type,
.md-typeset .ov-row--wip .ov-badge { border: 1.5px dashed currentColor; }
.md-typeset .ov-row--wip { opacity: 0.85; }
.wip-crane { margin-left: 0.15rem; }

/* WIP (not-yet-implemented) entries in the left sidebar: grayed out.
   The current page still highlights normally (exclude the active link). */
.md-nav__link--wip:not(.md-nav__link--active) { color: var(--md-default-fg-color--light); }

/* ToDo page */
.todo-count { opacity: 0.7; font-size: 0.85rem; }
.md-typeset .todo-level { margin: 0.8rem 0 0.2rem; }
.md-typeset .todo-ul { margin-top: 0.2rem; }
.todo-meta { opacity: 0.65; font-size: 0.85em; }
.cat-chip--level-base.is-active         { background: #2e7d3226; border-color: var(--level-base); }
.cat-chip--level-beginner.is-active     { background: #1e88e526; border-color: var(--level-beginner); }
.cat-chip--level-intermediate.is-active { background: #f9a82533; border-color: var(--level-intermediate); }
.cat-chip--level-advanced.is-active     { background: #e5393526; border-color: var(--level-advanced); }
.cat-chip--level-expert.is-active       { background: #6a1b9a26; border-color: var(--level-expert); }
/* Type chips share ONE neutral colour: type is not a colour dimension here
   (elements are coloured by level), so per-type colours would be misleading. */
.cat-chip--type-technique.is-active,
.cat-chip--type-algorithm.is-active,
.cat-chip--type-structure.is-active     { background: #455a6422; border-color: #455a64; color: inherit; }

/* =========================================================================
   Content badges (matrix) + matrix table
   ========================================================================= */
.md-typeset .cat-badge {
  display: inline-block; margin: 0.12rem 0.18rem; padding: 0.1rem 0.5rem;
  border-radius: 0.5rem; font-size: 0.72rem; font-weight: 600; text-decoration: none;
  border: 1px solid currentColor;   /* all entries have a defined edge (WIP = dashed) */
}
.md-typeset .cat-badge:hover { filter: brightness(0.95); }

.matrix__scroll { overflow-x: auto; }
.md-typeset table.matrix { width: 100%; border-collapse: collapse; display: table; }
.md-typeset .matrix th, .md-typeset .matrix td {
  border: 1px solid var(--md-default-fg-color--lightest); padding: 0.5rem 0.6rem;
  vertical-align: top; text-align: left;
}
.md-typeset .matrix thead th { font-weight: 700; }
.matrix__level { font-weight: 700; white-space: nowrap; }
.matrix__empty { opacity: 0.4; }
.matrix__row--base .matrix__level         { color: var(--level-base); }
.matrix__row--beginner .matrix__level     { color: var(--level-beginner); }
.matrix__row--intermediate .matrix__level { color: var(--level-intermediate-ink); }
.matrix__row--advanced .matrix__level     { color: var(--level-advanced); }
.matrix__row--expert .matrix__level       { color: var(--level-expert); }
.matrix__row--base         { background: #2e7d3212; }
.matrix__row--beginner     { background: #1e88e512; }
.matrix__row--intermediate { background: #f9a82519; }
.matrix__row--advanced     { background: #e5393512; }
.matrix__row--expert       { background: #6a1b9a12; }

/* =========================================================================
   Dependency graph container (graph.js)
   ========================================================================= */
.depgraph { min-height: 220px; overflow-x: auto; margin-top: 0.5rem; }
.depgraph svg { max-width: 100%; height: auto; }
.depgraph-loading, .depgraph-empty, .depgraph-fallback-msg { opacity: 0.7; font-size: 0.85rem; }

/* Topic icons (next to titles, table names, graph/matrix nodes) */
.topic-icon { font-style: normal; line-height: 1; }
.topic-icon--title { font-size: 0.75em; margin-left: 0.45rem; opacity: 0.85; vertical-align: middle; }
.md-typeset .ov-td--name .topic-icon { margin-right: 0.1rem; }
.md-typeset a.topic-icon--link { text-decoration: none; cursor: pointer; }
.md-typeset a.topic-icon--link:hover { filter: brightness(1.15); }

/* Topic filter chips: single accent (CUNEF orange) when active */
.cat-chip[class*="cat-chip--topic-"].is-active { background: #ec660722; border-color: #ec6607; color: inherit; }

/* Level-coloured badges (Temas page) */
.md-typeset .cat-lvl--base         { background: #e6f4ea; color: #1b5e20; }
.md-typeset .cat-lvl--beginner     { background: #e3f0fd; color: #0d47a1; }
.md-typeset .cat-lvl--intermediate { background: #fdf3d7; color: #7a5b00; }
.md-typeset .cat-lvl--advanced     { background: #fde3e1; color: #b71c1c; }
.md-typeset .cat-lvl--expert       { background: #efe4f7; color: #4a148c; }

/* Content-type badges (overview table) */
.md-typeset .ov-type {
  display: inline-block;
  padding: 0.05rem 0.45rem;
  border-radius: 0.6rem;
  font-size: 0.68rem;
  font-weight: 700;
  border: 1px solid currentColor;   /* solid edge for all rows; WIP rows override to dashed */
}
.ov-type--technique { background: #d7f0ea; color: #00695c; }
.ov-type--algorithm { background: #dbeafe; color: #1565c0; }
.ov-type--structure { background: #f0e0f7; color: #6a1b9a; }

/* Figures with captions */
.md-typeset figure.algo-figure { margin: 1.2rem auto; text-align: center; }
.md-typeset figure.algo-figure img,
.md-typeset figure.algo-figure svg { max-width: min(100%, 460px); height: auto; }
.md-typeset figure.algo-figure figcaption {
  font-size: 0.8rem;
  color: var(--md-default-fg-color--light);
  margin-top: 0.4rem;
}