/* ==========================================================================
   VI Caribbean Cultural Center — Landing Page Styles
   Design system: "Antilles Scholarly Heritage" (see project DESIGN.md)
   Primary Plum #692364 · Golden Sun secondary · Caribbean Teal tertiary
   Headings: Literata · Body: Source Serif 4 · UI/labels: Hanken Grotesk
   NOTE: Per project rule, the Madras plaid/tartan pattern is NOT used
   anywhere on this site (backgrounds, dividers, or buttons).
   ========================================================================== */

:root {
  /* Colors — copied from DESIGN.md tokens, do not invent new values */
  --color-surface: #fbf9f8;
  --color-surface-container-lowest: #ffffff;
  --color-surface-container-low: #f5f3f3;
  --color-surface-container: #efeded;
  --color-surface-container-high: #eae8e7;
  --color-on-surface: #1b1c1c;
  --color-on-surface-variant: #50434c;
  --color-outline: #82737d;
  --color-outline-variant: #d4c1cd;

  --color-primary: #692364;
  --color-primary-hover: #4f074c;
  --color-on-primary: #ffffff;

  --color-secondary-container: #feb71a;
  --color-on-secondary-container: #6b4b00;

  --color-tertiary-container: #00484d;
  --color-on-tertiary-container: #ffffff;

  --color-error: #ba1a1a;
  --color-on-error: #ffffff;
  --color-error-container: #ffdad6;
  --color-on-error-container: #93000a;

  /* Type */
  --font-display: 'Literata', Georgia, serif;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-label: 'Hanken Grotesk', system-ui, sans-serif;

  /* Radii — 4px standard, 12px large containers (per DESIGN.md) */
  --radius-sm: 0.25rem;
  --radius-lg: 0.75rem;
  --radius-pill: 9999px;

  /* Spacing */
  --space-unit: 8px;
  --gutter: 24px;
  --margin-mobile: 16px;
  --margin-desktop: 64px;
  --container-max: 1200px;

  --focus-ring: 0 0 0 3px rgba(105, 35, 100, 0.35);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-surface);
  color: var(--color-on-surface);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--color-primary);
  line-height: 1.15;
  margin: 0 0 0.5em;
}

h1 { font-size: 2.75rem; font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: 2rem; font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }

p { margin: 0 0 1em; }

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

img { max-width: 100%; display: block; }

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

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -50px;
  left: 8px;
  background: var(--color-primary);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-family: var(--font-label);
  font-weight: 600;
  text-decoration: none;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 8px;
}

/* Visible, high-contrast focus state on every interactive element */
a:focus-visible,
button:focus-visible,
input:focus-visible,
.modal-close:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---------- Layout helpers ---------- */

.section { padding: 80px var(--margin-desktop); }
.section-inner { max-width: var(--container-max); margin: 0 auto; }
.section-lede { max-width: 640px; color: var(--color-on-surface-variant); font-size: 1.125rem; }

.eyebrow {
  font-family: var(--font-label);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
  margin-bottom: 1em;
}

/* ---------- Buttons ---------- */

.btn {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease;
  min-height: 48px; /* WCAG target-size guidance */
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-lg { padding: 14px 34px; font-size: 1.05rem; }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
}
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-secondary {
  background: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
}
.btn-secondary:hover { filter: brightness(0.95); }

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover { background: rgba(105, 35, 100, 0.08); }

.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface-container-lowest);
  border-bottom: 1px solid var(--color-outline-variant);
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 12px var(--margin-desktop);
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-right: auto;
}

.brand-logo { width: 44px; height: auto; }

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-primary);
  font-size: 0.95rem;
  line-height: 1.15;
}

.main-nav ul {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  font-family: var(--font-label);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-on-surface-variant);
  text-decoration: none;
}

.main-nav a:hover { color: var(--color-primary); }

.btn-nav-donate { padding: 10px 24px; }

/* ---------- Hero ---------- */

.hero { padding: 64px var(--margin-desktop) 96px; }

.hero-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.hero-lede {
  font-size: 1.15rem;
  color: var(--color-on-surface-variant);
  max-width: 52ch;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.hero-media img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-outline-variant);
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- About ---------- */

.about { background: var(--color-surface-container-low); }

.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
  align-items: start;
}

.about-media img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-outline-variant);
}

.about-list {
  padding-left: 1.25em;
  color: var(--color-on-surface-variant);
}
.about-list li { margin-bottom: 0.6em; }

.pull-quote {
  margin: 28px 0 0;
  padding: 24px 28px;
  background: var(--color-surface-container-lowest);
  border-left: 4px solid var(--color-secondary-container);
  border-radius: var(--radius-sm);
}
.pull-quote p { font-style: italic; margin-bottom: 0.5em; color: var(--color-on-surface); }
.pull-quote footer { font-family: var(--font-label); font-size: 0.85rem; color: var(--color-on-surface-variant); }

/* ---------- Gallery ---------- */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gutter);
  margin-top: 40px;
}

.gallery-card {
  margin: 0;
  background: var(--color-surface-container-lowest);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.gallery-card img { width: 100%; height: 340px; object-fit: cover; }

.gallery-card figcaption {
  padding: 16px 20px;
  font-family: var(--font-label);
  font-size: 0.9rem;
  color: var(--color-on-surface-variant);
}

/* ---------- Donate band ---------- */

.donate-band { background: var(--color-primary); color: #fff; }
.donate-band h2 { color: #fff; }
.donate-band p { color: rgba(255,255,255,0.85); margin-bottom: 0; }

.donate-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.donate-band-inner > div:first-child { max-width: 640px; }

/* ---------- Newsletter ---------- */

.newsletter-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}

.newsletter-form { max-width: 460px; }

.form-row { margin-bottom: 20px; }

.form-row label {
  display: block;
  font-family: var(--font-label);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--color-on-surface);
}

.form-row .optional { font-weight: 400; color: var(--color-on-surface-variant); }
.form-row .required { color: var(--color-error); }

.form-row input[type="text"],
.form-row input[type="email"] {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 1rem;
  border: 1px solid var(--color-outline);
  border-radius: var(--radius-sm);
  background: var(--color-surface-container-lowest);
  color: var(--color-on-surface);
}

.form-row input:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
}

.form-row input[aria-invalid="true"] {
  border-color: var(--color-error);
}

.field-error {
  color: var(--color-on-error-container);
  background: var(--color-error-container);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin: 8px 0 0;
}

.form-status {
  margin: 16px 0 0;
  font-family: var(--font-label);
  font-weight: 600;
  font-size: 0.9rem;
  min-height: 1.2em;
}
.form-status.success { color: #1e5e2b; }
.form-status.error { color: var(--color-on-error-container); }

.privacy-note {
  font-size: 0.8rem;
  color: var(--color-on-surface-variant);
  margin-top: 16px;
}

/* ---------- Modal ---------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(105, 35, 100, 0.35); /* Plum scrim per DESIGN.md overlay spec */
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 1000;
}

.modal-overlay[hidden] { display: none; }

.modal {
  background: var(--color-surface-container-lowest);
  border-radius: var(--radius-lg);
  max-width: 440px;
  width: 100%;
  padding: 40px 32px 32px;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}

.modal h2 { margin-bottom: 0.4em; }

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-on-surface-variant);
  cursor: pointer;
  border-radius: 50%;
}
.modal-close:hover { background: var(--color-surface-container-low); }

/* ---------- Footer ---------- */

.site-footer { background: var(--color-primary); color: #fff; }

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 64px var(--margin-desktop) 32px;
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 40px;
}

.footer-brand { display: flex; gap: 16px; align-items: flex-start; }
.footer-brand > a { flex-shrink: 0; }
.footer-org { font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; margin: 0 0 4px; }
.footer-org a { color: #fff; text-decoration: none; }
.footer-org a:hover { text-decoration: underline; }
.footer-sub { color: rgba(255,255,255,0.75); font-size: 0.9rem; margin: 0; }

.footer-contact h3,
.footer-links h3 {
  font-family: var(--font-label);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--color-secondary-container);
  margin-bottom: 16px;
}

.footer-contact address { font-style: normal; color: rgba(255,255,255,0.9); line-height: 1.8; }
.footer-contact a, .footer-links a { color: rgba(255,255,255,0.9); text-decoration: none; }
.footer-contact a:hover, .footer-links a:hover { text-decoration: underline; }

.footer-links ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding: 20px var(--margin-desktop);
  text-align: center;
}
.footer-bottom p { margin: 0; color: rgba(255,255,255,0.7); font-size: 0.8rem; }

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

@media (max-width: 900px) {
  .header-inner { flex-wrap: wrap; padding: 12px var(--margin-mobile); }
  .main-nav { order: 3; width: 100%; }
  .main-nav ul { gap: 18px; flex-wrap: wrap; }

  .hero, .section { padding-left: var(--margin-mobile); padding-right: var(--margin-mobile); }

  .hero-inner, .about-grid, .newsletter-inner { grid-template-columns: 1fr; }
  .hero-media { order: -1; }

  .gallery-grid { grid-template-columns: 1fr; }

  h1 { font-size: 2.1rem; }
  h2 { font-size: 1.6rem; }

  .footer-inner { grid-template-columns: 1fr; }
}

/* Respect users who've asked for reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .skip-link { transition: none; }
}