/* ==========================================================================
   Classical — design-system tokens and component classes.

   This file is vendored from the "Classical" design system and is the source
   of truth for the site's LOOK (colors, fonts, spacing, radii, shadows).
   To retheme the whole site, edit the tokens in the :root block below.

   Page LAYOUT lives in site.css. Prefer editing that file for anything
   specific to the course page, so this one stays swappable.

   Deviation from the vendored original: the `@import` of Google Fonts was
   removed, because index.html links the same families with the extra weights
   and italics the page uses (Cormorant 300/400/500/600, Lora 400/500/600 +
   italic). Keeping both would fetch two overlapping stylesheets.
   ========================================================================== */

:root {
  /* — core roles — */
  --color-bg: #f3f2f2;
  --color-surface: #eae9e9;
  --color-text: #201f1d;
  --color-accent: #b68235;
  --color-accent-2: #ac803e;
  --color-divider: color-mix(in srgb, #201f1d 16%, transparent);

  /* Tonal ramps — generated in OKLCH on one shared lightness scale, so the
     same step of any role matches the others in visual value. */
  --color-neutral-100: #f8f4f4;
  --color-neutral-200: #eae7e7;
  --color-neutral-300: #d7d3d3;
  --color-neutral-400: #bab6b6;
  --color-neutral-500: #9b9797;
  --color-neutral-600: #7d7979;
  --color-neutral-700: #605d5d;
  --color-neutral-800: #444141;
  --color-neutral-900: #2d2b2b;

  --color-accent-100: #fff3e4;
  --color-accent-200: #ffe3bf;
  --color-accent-300: #facb8d;
  --color-accent-400: #e1ad66;
  --color-accent-500: #c28d41;
  --color-accent-600: #a06f24;
  --color-accent-700: #7d5411;
  --color-accent-800: #5a3b0a;
  --color-accent-900: #3a270d;

  --color-accent-2-100: #fff3e4;
  --color-accent-2-200: #ffe3be;
  --color-accent-2-300: #f5cd96;
  --color-accent-2-400: #dbaf70;
  --color-accent-2-500: #bc8f4e;
  --color-accent-2-600: #9b7232;
  --color-accent-2-700: #79561f;
  --color-accent-2-800: #573d14;
  --color-accent-2-900: #382810;

  /* — type — */
  --font-heading: "Cormorant Garamond", system-ui, sans-serif;
  --font-heading-weight: 600;
  --font-body: "Lora", system-ui, sans-serif;

  /* — spacing (density 1.15x) — */
  --space-1: 4.6px;
  --space-2: 9.2px;
  --space-3: 13.8px;
  --space-4: 18.4px;
  --space-6: 27.6px;
  --space-8: 36.8px;

  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 7px;

  /* Elevation — a whisper, not a drop shadow. */
  --shadow-sm: 0 1px 2px color-mix(in srgb, #2d2b2b 14%, transparent);
  --shadow-md: 0 3px 10px color-mix(in srgb, #2d2b2b 16%, transparent);
  --shadow-lg: 0 12px 32px color-mix(in srgb, #2d2b2b 22%, transparent);
}

/* — base — */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  font-weight: 400;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  line-height: 1.12; letter-spacing: -0.015em; margin: 0 0 var(--space-2);
}
h1 { font-size: 42px; }
h2 { font-size: 32px; }
h3 { font-size: 25px; }
h4 { font-size: 20px; }
h5 { font-size: 16px; }
h6 { font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; }

p { margin: 0 0 var(--space-3); }
a { color: var(--color-accent); text-underline-offset: 3px; }
img { display: block; max-width: 100%; }
figure { margin: 0; }
figcaption {
  font-size: 11px; margin-top: var(--space-1);
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
}

.text-muted { color: color-mix(in srgb, var(--color-text) 55%, transparent); }

:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 30%, transparent); }

/* — rules — */
.hr {
  height: 1px; border: 0; margin: var(--space-4) 0;
  background: var(--color-divider);
}

/* — plate: every content photograph goes through this wrapper —
   a warm archival grade inside a thin surface-colored mat.
   Add `plate--raw` alongside it to skip the grade (see site.css). */
.plate {
  filter: sepia(0.22) saturate(0.82) contrast(1.05);
  box-sizing: border-box;
  border: 6px solid var(--color-surface);
  outline: 1px solid var(--color-divider);
}

/* — buttons — */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 14px; line-height: 1.2; color: var(--color-text);
  background: transparent; border: 1px solid transparent;
  padding: var(--space-2) calc(var(--space-3) * 1.2);
  border-radius: var(--radius-md);
}
.btn svg { display: block; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { color: var(--color-accent); border-color: var(--color-accent); }
.btn-primary:hover { background: color-mix(in srgb, var(--color-accent) 12%, transparent); }
.btn-primary:active { background: color-mix(in srgb, var(--color-accent) 22%, transparent); }
.btn-secondary { border-color: var(--color-divider); }
.btn-secondary:hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.btn-secondary:active { background: color-mix(in srgb, var(--color-text) 14%, transparent); }
.btn-ghost { color: var(--color-accent); padding-inline: var(--space-1); }
.btn-ghost:hover { background: color-mix(in srgb, var(--color-accent) 10%, transparent); }
.btn-ghost:active { background: color-mix(in srgb, var(--color-accent) 18%, transparent); }
.btn-icon { width: 36px; height: 36px; padding: 0; }
.btn-block { width: 100%; margin-top: var(--space-2); }

/* — forms — */
.field > label {
  display: block; font-size: 12px; margin-bottom: 5px;
  color: color-mix(in srgb, var(--color-text) 70%, transparent);
}
.input {
  width: 100%; min-height: 36px; padding: 6px 10px; font: inherit;
  font-size: 14px; color: var(--color-text); caret-color: var(--color-accent);
  background: transparent;
  border: 1px solid var(--color-divider); border-radius: var(--radius-md);
}
.input:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible { border-color: var(--color-accent); outline-offset: 0; }
textarea.input { min-height: 90px; resize: vertical; }

/* — cards — */
.card {
  display: flex; flex-direction: column; gap: var(--space-2);
  padding: var(--space-3); border-radius: var(--radius-md);
  background: transparent; border: 1px solid var(--color-divider);
}
.card-kicker { font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-accent); }
.card-title {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 17px; line-height: 1.2;
}
.card-body { margin: 0; font-size: 13px; opacity: 0.8; flex: 1; }
.card-meta {
  display: flex; align-items: center; gap: 6px; font-size: 11px;
  color: color-mix(in srgb, var(--color-text) 50%, transparent);
}
.elev-sm { box-shadow: var(--shadow-sm); }
.elev-md { box-shadow: var(--shadow-md); }
.elev-lg { box-shadow: var(--shadow-lg); }

/* — tags — */
.tag {
  display: inline-flex; align-items: center; font-size: 11px;
  letter-spacing: 0.02em; padding: 3px 10px;
  border-radius: calc(var(--radius-md) * 0.75);
}
.tag-accent { background: var(--color-accent-100); color: var(--color-accent-800); }
.tag-accent-2 { background: var(--color-accent-2-100); color: var(--color-accent-2-800); }
.tag-neutral { background: var(--color-neutral-100); color: var(--color-neutral-800); }
.tag-outline { border: 1px solid var(--color-accent); color: var(--color-accent); }

/* — tables — */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th {
  text-align: left; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 60%, transparent);
  padding: var(--space-2); border-bottom: 1px solid var(--color-divider);
}
.table td {
  padding: var(--space-2);
  border-bottom: 1px solid var(--color-divider);
}
.table tbody tr:hover { background: color-mix(in srgb, var(--color-text) 4%, transparent); }