/* ==========================================================================
   ECON 416 — Behavioral Economics
   Attic red-figure theme

   Palette taken from the Siren Vase (Odysseus and the Sirens), the same
   artwork used on the course landing page: terracotta figures reserved
   against a fired black ground.
   ========================================================================== */

/* Fonts are loaded with <link> in each page's <head>, not @import —
   an @import here would cost an extra render-blocking round trip. */

:root {
    /* Attic red-figure palette */
    --attic-black:    #171310;
    --soot:           #2B211B;

    --terracotta:     #B55232;
    --clay-highlight: #D07852;
    --deep-oxide:     #71311F;

    --ancient-cream:  #E6D1AD;

    /* Semantic colors */
    --background:     var(--attic-black);
    --surface:        var(--soot);
    --primary:        var(--terracotta);
    --primary-hover:  var(--clay-highlight);
    --border:         var(--deep-oxide);
    --text:           var(--ancient-cream);
    --text-muted:     #B79D82;

    /* Type */
    --font-display: 'Cinzel', 'Trajan Pro', Georgia, serif;
    --font-body:    'EB Garamond', Georgia, 'Times New Roman', serif;

    /* Rhythm */
    --measure: 68ch;
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

/* Type scales with the viewport. Because --measure is expressed in ch, the
   reading column widens with the type at a constant ~68 characters per line —
   so a large display gets bigger text rather than a longer, harder-to-track
   line. Below the clamp floor nothing shrinks past 17px. */
body {
    background-color: var(--background);
    color: var(--text);
    font-family: var(--font-body);
    font-size: clamp(1.15rem, 1rem + 0.5vw, 1.5rem);
    line-height: 1.65;
    padding: 0 0 4rem;
    -webkit-font-smoothing: antialiased;
}

/* Fluid gutters: ~1rem on a phone, ~2.5rem on a desktop. The ceiling stays
   moderate on purpose — the accordion header spans the container while the
   prose is capped at --measure, so a very wide container would leave the
   header overhanging the text it belongs to. */
.container {
    max-width: 1000px;
    padding-inline: clamp(1rem, 4vw, 2.5rem);
}

/* --------------------------------------------------------------------------
   Display type

   Cinzel is cut from Roman inscriptional capitals, so it is set in caps with
   open tracking throughout. It is never used for running text — at paragraph
   length inscriptional capitals are unreadable.
   -------------------------------------------------------------------------- */

h1, h2, h3, h4, h5, h6,
.display-face {
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--primary);
    font-weight: 600;
    line-height: 1.25;
}

h1 {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    letter-spacing: 0.1em;
    margin-bottom: 0.25rem;
}

h2 { font-size: 1.4rem; }
h3 { font-size: 1.15rem; }

h4, h5, h6 {
    font-size: 1rem;
    color: var(--clay-highlight);
    letter-spacing: 0.1em;
}

/* Sub-headings inside prose sit closer to their paragraph than to the one above */
.accordion-body h4,
.accordion-body h5 {
    margin-top: 1.75rem;
    margin-bottom: 0.5rem;
}

.accordion-body > :first-child {
    margin-top: 0;
}

/* --------------------------------------------------------------------------
   Masthead
   -------------------------------------------------------------------------- */

.masthead {
    background: var(--surface);
    border-bottom: 2px solid var(--border);
    padding: 2.25rem 0 1.75rem;
    margin-bottom: 2.5rem;
}

.masthead .eyebrow {
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.22em;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.subtitle {
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Links
   -------------------------------------------------------------------------- */

a {
    color: var(--primary-hover);
    text-decoration-color: rgba(208, 120, 82, 0.4);
    text-underline-offset: 0.15em;
}

a:hover,
a:focus {
    color: var(--text);
    text-decoration-color: currentColor;
}

.back-link {
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.85rem;
    text-decoration: none;
}

/* --------------------------------------------------------------------------
   Bootstrap accordion — retheme via Bootstrap 5.3 CSS variables rather than
   overriding selectors, which keeps specificity flat and survives upgrades.
   -------------------------------------------------------------------------- */

.accordion {
    --bs-accordion-color: var(--text);
    --bs-accordion-bg: transparent;
    --bs-accordion-border-color: var(--border);
    --bs-accordion-border-width: 1px;
    --bs-accordion-border-radius: 0;
    --bs-accordion-inner-border-radius: 0;

    --bs-accordion-btn-color: var(--text);
    --bs-accordion-btn-bg: var(--surface);
    --bs-accordion-btn-padding-y: 1rem;
    --bs-accordion-btn-padding-x: 1.25rem;
    --bs-accordion-btn-focus-box-shadow: 0 0 0 2px var(--clay-highlight);

    --bs-accordion-active-color: var(--attic-black);
    --bs-accordion-active-bg: var(--terracotta);

    --bs-accordion-body-padding-y: 1.5rem;
    --bs-accordion-body-padding-x: 1.25rem;

    /* Chevrons recolored to match: cream when closed, black on terracotta when open */
    --bs-accordion-btn-icon: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23E6D1AD'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708'/%3e%3c/svg%3e");
    --bs-accordion-btn-active-icon: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23171310'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708'/%3e%3c/svg%3e");
}

.accordion-button {
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 1rem;
    font-weight: 600;

    /* Headings live inside <button>, which browsers refuse to let you
       drag-select. Restore selection so the syllabus can be copied. */
    -webkit-user-select: text;
    user-select: text;
}

.accordion-item {
    border-left: 0;
    border-right: 0;
}

/* Centred, so the residual gap between the reading column and the full-width
   header is split evenly rather than pooling on the right. */
.accordion-body {
    max-width: var(--measure);
    margin-inline: auto;
}

/* Schedule needs the full width, not the reading measure */
.accordion-body.is-wide {
    max-width: none;
}

/* --------------------------------------------------------------------------
   Tables
   -------------------------------------------------------------------------- */

.table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0 1.5rem;
    font-size: 1rem;
}

th {
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.82rem;
    color: var(--primary);
    text-align: left;
    font-weight: 600;
}

th, td {
    border: 1px solid var(--border);
    padding: 0.5rem 0.75rem;
    vertical-align: top;
}

tbody tr:nth-child(odd) {
    background: rgba(43, 33, 27, 0.55);
}

/* Grading scale is a short two-column table — keep it narrow */
.table-scale {
    max-width: 22rem;
}

.table-scale td:last-child,
.table-scale th:last-child {
    text-align: right;
}

/* Schedule table */
.table-schedule th:first-child,
.table-schedule td:first-child {
    white-space: nowrap;
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Exams, breaks and holidays — the only cells that carry emphasis */
.is-marked {
    background: rgba(181, 82, 50, 0.28) !important;
    border-left: 3px solid var(--primary);
}

/* --------------------------------------------------------------------------
   Small pieces
   -------------------------------------------------------------------------- */

.meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
    gap: 1.25rem 2rem;
    margin-bottom: 1.5rem;
}

.meta-label {
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.78rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 0.15rem;
}

blockquote {
    border-left: 2px solid var(--border);
    padding-left: 1.25rem;
    margin: 1.25rem 0;
    color: var(--text);
    font-style: italic;
}

.note {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.emphasis {
    color: var(--clay-highlight);
    font-weight: 600;
}

footer {
    border-top: 1px solid var(--border);
    margin-top: 3rem;
    padding-top: 1.5rem;
    color: var(--text-muted);
    font-size: 0.92rem;
}

/* --------------------------------------------------------------------------
   Controls
   -------------------------------------------------------------------------- */

.btn-attic {
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.78rem;
    color: var(--text);
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 0;
    padding: 0.4rem 0.9rem;
}

.btn-attic:hover,
.btn-attic:focus {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--attic-black);
}

/* --------------------------------------------------------------------------
   Accessibility
   -------------------------------------------------------------------------- */

:focus-visible {
    outline: 2px solid var(--clay-highlight);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 576px) {
    /* No font-size override here: the clamp floor already sets the phone
       size, and re-declaring it would shrink text below that floor. */

    .masthead {
        padding: 1.5rem 0 1.25rem;
        margin-bottom: 1.75rem;
    }

    .accordion {
        --bs-accordion-btn-padding-x: 0.9rem;
        --bs-accordion-body-padding-x: 0.9rem;
    }

    .accordion-button { font-size: 0.9rem; }
}