/* ==========================================================================
   SPESSE UNIBEN public site — mobile-first, framework-free CSS.
   Design tokens first, then base/reset, layout, components, utilities.
   Breakpoints are min-width (mobile-first): 48rem (~768px) tablet+,
   64rem (~1024px) desktop+.
   ========================================================================== */

:root {
  /* Official UNIBEN colors: purple, gold, green (per university branding).
     Deep purple is primary (drawn from the crest), gold is the secondary
     accent. Values below are tuned to meet WCAG AA contrast (>=4.5:1 for
     normal text, >=3:1 for large text/UI) against their typical pairing. */
  --color-brand: #5b1a6b;
  --color-brand-dark: #3a1046;
  --color-brand-light: #f5eef7;
  --color-accent: #8a6d1b;
  --color-accent-light: #fbf3dc;
  --color-text: #1a1523;
  --color-text-muted: #5c5566;
  --color-bg: #ffffff;
  --color-bg-muted: #f7f5f9;
  --color-border: #ded9e3;
  --color-danger: #9b2c2c;
  --color-danger-bg: #fdecec;
  --color-success: #1f7a4d;
  --color-success-bg: #e8f6ee;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 0.5rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;
  --max-width: 75rem;
  --shadow-sm: 0 1px 3px rgba(26, 21, 35, 0.08), 0 1px 2px rgba(26, 21, 35, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 21, 35, 0.12), 0 2px 6px rgba(26, 21, 35, 0.08);
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 1rem;
}

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

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 var(--space-3); color: var(--color-brand-dark); }
h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.35rem, 3vw, 1.75rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 var(--space-3); }

a { color: var(--color-brand); }
a:hover { color: var(--color-brand-dark); }

ul, ol { padding-left: 1.25rem; }

/* Respect reduced-motion preferences */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

/* ---- Accessibility utilities ---- */
.sr-only {
  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;
  left: 0.5rem;
  top: -3rem;
  background: var(--color-brand);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  z-index: 100;
  transition: top 0.15s ease-in-out;
}
.skip-link:focus { top: 0.5rem; }

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

main:focus-visible { outline: none; }

/* ---- Layout ---- */
.site-nav__inner,
.site-footer__inner,
.section {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.section { padding-block: var(--space-5); }
.section--muted { background: var(--color-bg-muted); }

/* ---- Nav ---- */
.site-nav {
  background: var(--color-bg);
  border-bottom: 3px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
}

.site-nav__brand {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: var(--color-brand-dark);
}

.site-nav__toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1.25rem;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
}

.site-nav__menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: none;
  flex-direction: column;
  gap: var(--space-2);
  position: absolute;
  inset-inline: 0;
  top: 100%;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3);
}

.site-nav__menu.is-open { display: flex; }

.site-nav__menu a {
  display: block;
  padding: var(--space-2) 0;
  text-decoration: none;
  color: var(--color-text);
}

.site-nav__cta {
  background: var(--color-brand);
  color: #fff !important;
  padding: var(--space-2) var(--space-3) !important;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.15s ease, transform 0.15s ease;
}
.site-nav__cta:hover { background: var(--color-brand-dark); transform: translateY(-1px); }

@media (min-width: 48rem) {
  .site-nav__toggle { display: none; }
  .site-nav__menu {
    display: flex;
    flex-direction: row;
    position: static;
    border: none;
    padding: 0;
    gap: var(--space-4);
    align-items: center;
  }
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-brand-dark);
  color: #f3ecf5;
  margin-top: var(--space-6);
  border-top: 4px solid var(--color-accent);
}
.site-footer a { color: #e6d6ec; }
.site-footer__inner {
  display: grid;
  gap: var(--space-4);
  padding-block: var(--space-5);
}
.site-footer h2 { color: #fff; font-size: 1rem; }
.site-footer__legal { text-align: center; padding: var(--space-3); font-size: 0.85rem; border-top: 1px solid rgba(255,255,255,0.15); margin: 0; }

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

/* ---- Hero ---- */
.hero {
  background: linear-gradient(135deg, var(--color-brand) 0%, var(--color-brand-dark) 100%);
  color: #fff;
  position: relative;
  border-bottom: 4px solid var(--color-accent);
}
.hero__inner { max-width: var(--max-width); margin-inline: auto; padding: var(--space-6) var(--space-3); }
.hero h1, .hero h2 { color: #fff; }
.hero__lead { max-width: 45rem; color: #ecdcf1; font-size: 1.1rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.hero .btn--primary { background: #fff; color: var(--color-brand); }
.hero .btn--primary:hover { background: var(--color-accent-light); color: var(--color-brand-dark); }
.hero .btn--ghost { border-color: #fff; color: #fff; }
.hero .btn--ghost:hover { background: rgba(255, 255, 255, 0.14); color: #fff; }

/* ---- Buttons ---- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  font-size: 1rem;
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.btn--primary { background: var(--color-brand); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: var(--color-brand-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; border-color: var(--color-brand); color: var(--color-brand); }
.btn--ghost:hover { background: var(--color-brand-light); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }

/* ---- Cards ---- */
.card-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
  margin-block: var(--space-4);
}
@media (min-width: 48rem) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 64rem) { .card-grid { grid-template-columns: repeat(3, 1fr); } }

.card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  background: var(--color-bg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--color-brand); }
.card h3 a, .card h2 a { text-decoration: none; }
.card__eyebrow { color: var(--color-accent); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: var(--space-1); }
.card__meta { color: var(--color-text-muted); font-size: 0.9rem; }
.card__link { font-weight: 600; text-decoration: none; }

/* ---- Filter bar ---- */
.filter-bar { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-block: var(--space-3); }
.filter-bar__chip {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.9rem;
}
.filter-bar__chip.is-active { background: var(--color-brand); color: #fff; border-color: var(--color-brand); }

/* ---- CTA banner ---- */
.cta-banner { text-align: center; background: var(--color-brand-light); border-radius: var(--radius); border-top: 3px solid var(--color-accent); }

/* ---- News ---- */
.news-list { list-style: none; padding: 0; }
.news-list__item { padding-block: var(--space-4); border-bottom: 1px solid var(--color-border); }
.news-list__item h2 { margin-bottom: var(--space-1); }
.article__body { max-width: 45rem; }

/* ---- Downloads ---- */
.download-list { list-style: none; padding: 0; display: grid; gap: var(--space-2); }
.download-list__link {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--color-text);
}
.download-list__link:hover { border-color: var(--color-brand); }
.download-list__title { font-weight: 600; }
.download-list__category { color: var(--color-text-muted); font-size: 0.85rem; white-space: nowrap; }

/* ---- Forms (shared) ---- */
.form-field { margin-bottom: var(--space-3); display: flex; flex-direction: column; gap: 0.35rem; }
.form-field label { font-weight: 600; }
.form-field input,
.form-field select,
.form-field textarea {
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  width: 100%;
  max-width: 32rem;
}
.form-field input:invalid[aria-invalid="true"],
.form-field__error { color: var(--color-danger); }
.form-field__error { font-size: 0.85rem; margin: 0.25rem 0 0; }
.form-hint { color: var(--color-text-muted); font-size: 0.9rem; }
.form-status[role="status"]:not(:empty),
.form-status[role="alert"]:not(:empty) {
  margin-top: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius);
  background: var(--color-success-bg);
  color: var(--color-success);
}

/* ---- Verify page ---- */
.verify-form { display: flex; flex-wrap: wrap; align-items: flex-end; gap: var(--space-3); max-width: 40rem; }
.verify-result { margin-top: var(--space-4); }
.verify-result__status { padding: var(--space-3); border-radius: var(--radius); }
.verify-result__status--valid { background: var(--color-success-bg); color: var(--color-success); }
.verify-result__status--invalid { background: var(--color-danger-bg); color: var(--color-danger); }
.verify-result dl { display: grid; grid-template-columns: max-content 1fr; gap: 0.25rem var(--space-3); margin: var(--space-2) 0 0; }
.verify-result dt { font-weight: 600; }

/* ---- Application form / stepper ---- */
.stepper { list-style: none; display: flex; flex-wrap: wrap; gap: var(--space-2); padding: 0; margin-bottom: var(--space-4); }
.stepper__step {
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  background: var(--color-bg-muted);
  color: var(--color-text-muted);
  font-size: 0.85rem;
}
.stepper__step.is-active { background: var(--color-brand); color: #fff; font-weight: 600; }

.application-form .form-step { display: block; border: none; padding: 0; margin: 0 0 var(--space-5); }
.application-form.js-enhanced .form-step { display: none; }
.application-form.js-enhanced .form-step.is-active { display: block; }
.application-form legend { font-weight: 700; font-size: 1.1rem; padding: 0; margin-bottom: var(--space-3); }

.stepper-nav { display: flex; justify-content: space-between; gap: var(--space-3); }
.application-form:not(.js-enhanced) .stepper,
.application-form:not(.js-enhanced) .stepper-nav { display: none; }

/* ---- Contact ---- */
.contact-card { line-height: 1.8; }

/* ---- Not found ---- */
.not-found { text-align: center; }