/*
 * Custom styles for "Меридиан Знаний".
 * Authored here in src/; copied to dist/css/custom.css by the Gulp `copy:misc` task.
 * Loaded AFTER the generated main.css (css/style.css) so these rules take precedence.
 * Do NOT edit dist/ by hand — run `npm run build` to regenerate it.
 */

/* ------------------------------------------------------------------ *
 * Design tokens
 * Palette derived from the brand cover logo (online school
 * «Меридиан Знаний»): deep teal + warm gold on cream, with maroon,
 * sky-blue, orange and green accents. Mirrors docs/design/tokens.md.
 * ------------------------------------------------------------------ */
:root {
  /* Brand colors */
  --color-teal: #043c4b; /* primary: deep teal/navy */
  --color-teal-dark: #062d38; /* darker teal for hovers/depth */
  --color-gold: #d7a94a; /* secondary: warm gold (laurel/compass) */
  --color-gold-dark: #b3862f; /* gold for text on light surfaces */
  --color-brown: #613000; /* wordmark brown */
  --color-cream: #f7f4e3; /* brand background */
  --color-maroon: #7a1118; /* accent (kept AA on cream) */

  /* Bright accents (decorative / large UI only) */
  --color-blue: #0a85c9;
  --color-orange: #fe6400;
  --color-green: #0dc847;

  /* Semantic roles */
  --color-bg: var(--color-cream);
  --color-surface: #ffffff;
  --color-text: #0d2730; /* near-black teal, 14:1 on cream */
  --color-muted: #4a5a60; /* 6.5:1 on cream */
  --color-primary: var(--color-teal);
  --color-accent: var(--color-maroon);
  --color-link: var(--color-maroon);
  --color-on-primary: var(--color-cream); /* text on teal */
  --color-on-accent: #ffffff; /* text on maroon */

  /* Typography */
  --font-base: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial,
    sans-serif;
  --font-heading: Georgia, 'Times New Roman', 'PT Serif', serif;
  --font-size-base: 1rem;
  --line-height-base: 1.5;
  --line-height-heading: 1.2;

  /* Type scale (modular, ~1.25) */
  --font-size-h1: 2.5rem;
  --font-size-h2: 1.75rem;
  --font-size-h3: 1.25rem;

  /* Spacing scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;

  /* Layout */
  --content-max-width: 70rem;

  /* Effects */
  --radius: 0.5rem;
  --border-subtle: 1px solid rgba(4, 60, 75, 0.15);
}

/* ------------------------------------------------------------------ *
 * Base layer
 * ------------------------------------------------------------------ */
body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  line-height: var(--line-height-heading);
  color: var(--color-primary);
  margin-block: 0 var(--space-md);
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

a {
  color: var(--color-link);
}

a:hover,
a:focus {
  color: var(--color-teal-dark);
}

img {
  max-width: 100%;
  height: auto;
}

/* ------------------------------------------------------------------ *
 * Layout helpers
 * ------------------------------------------------------------------ */
.container {
  max-width: var(--content-max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

/* Surface card (cream/white block with subtle border) */
.surface {
  background-color: var(--color-surface);
  border: var(--border-subtle);
  border-radius: var(--radius);
  padding: var(--space-lg);
}

/* ------------------------------------------------------------------ *
 * Components
 * ------------------------------------------------------------------ */
.button {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border: 2px solid transparent;
}

.button:hover,
.button:focus {
  background-color: var(--color-teal-dark);
  color: var(--color-on-primary);
}

.button--accent {
  background-color: var(--color-accent);
  color: var(--color-on-accent);
}

.button--accent:hover,
.button--accent:focus {
  background-color: #5c0b11;
  color: var(--color-on-accent);
}

/* ------------------------------------------------------------------ *
 * Page sections
 * ------------------------------------------------------------------ */
.hero-banner {
  display: block;
  max-width: var(--content-max-width);
  margin: var(--space-md) auto 0;
  padding-inline: var(--space-md);
}

.hero-banner img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.site-name {
  margin: 0;
  padding-block: var(--space-md);
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-primary);
}

.hero {
  padding-block: var(--space-lg) var(--space-xl);
}

.hero__tagline {
  font-size: 1.25rem;
  color: var(--color-muted);
  margin-block: 0 var(--space-md);
}

.subjects,
.contacts {
  list-style: none;
  padding: 0;
}

.subjects {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 1fr;
}

.subjects > li {
  font-weight: 600;
  text-align: center;
}

.contacts {
  margin-block: var(--space-md);
}

.contacts > li {
  margin-block: var(--space-xs);
}

footer.container {
  margin-block-start: var(--space-xl);
  padding-block: var(--space-lg);
  border-top: var(--border-subtle);
}

@media (min-width: 48rem) {
  .subjects {
    grid-template-columns: repeat(3, 1fr);
  }
}