/* style.css – Tokens de diseño UABC: Verde, Dorado, Blanco */

/* Art direction: Evento universitario para egresados UABC
   Palette: Verde institucional + dorado como acento
   Typography: Montserrat (display) + Open Sans (body)
   Density: Balanced */

:root {
  /* ─── COLORES UABC ─── */
  --uabc-verde:         #1A6B2A;
  --uabc-verde-oscuro:  #134d1e;
  --uabc-verde-claro:   #2a8a3a;
  --uabc-dorado:        #F5C200;
  --uabc-dorado-hover:  #d9ab00;
  --uabc-dorado-dark:   #b8920a;
  --uabc-blanco:        #FFFFFF;

  /* ─── SUPERFICIES ─── */
  --color-bg:           #F4F4F4;
  --color-surface:      #FFFFFF;
  --color-surface-2:    #F9F9F9;
  --color-border:       rgba(0,0,0,0.10);
  --color-divider:      rgba(0,0,0,0.08);

  /* ─── TEXTO ─── */
  --color-text:         #1a1a1a;
  --color-text-muted:   #555555;
  --color-text-faint:   #888888;
  --color-text-inverse: #FFFFFF;

  /* ─── SEMÁNTICOS ─── */
  --color-primary:       var(--uabc-verde);
  --color-primary-hover: var(--uabc-verde-oscuro);
  --color-accent:        var(--uabc-dorado);
  --color-accent-hover:  var(--uabc-dorado-hover);
  --color-success:       #2e7d32;
  --color-error:         #c62828;

  /* ─── TIPOGRAFÍA ─── */
  --font-display: 'Montserrat', 'Segoe UI', sans-serif;
  --font-body:    'Open Sans', 'Segoe UI', sans-serif;

  /* Escala fluida */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);

  /* ─── ESPACIADO 4px ─── */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* ─── RADIO ─── */
  --radius-sm:   0.25rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-full: 9999px;

  /* ─── SOMBRAS ─── */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.14);

  /* ─── CONTENIDOS ─── */
  --content-narrow:  640px;
  --content-default: 960px;
  --content-wide:    1200px;


  /* ─── TRANSICIONES ─── */
  --transition-interactive: 180ms cubic-bezier(0.16,1,0.3,1);
}

/* ══════════════════════════════
   CONTENEDOR
══════════════════════════════ */
.container {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
.container--narrow { max-width: var(--content-narrow); }

/* ══════════════════════════════
   HEADER PRINCIPAL
══════════════════════════════ */
.site-header {
  background: var(--uabc-verde);
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
}

/* ── Logo UABC: nunca se encoge, proporción intacta ── */
.header-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.header-logo-img {
  width: 44px;
  height: auto;
  flex-shrink: 0;
  object-fit: contain;
  display: block;
}

/* ── Texto universidad: trunca en lugar de empujar ── */
.header-center {
  flex: 1;
  min-width: 0;
  display: flex;
  justify-content: center;
}
.header-university {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--uabc-blanco);
  letter-spacing: 0.02em;
  max-width: none;
}

/* ── Acciones derecha ── */
.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.btn-header-admin {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: rgba(255,255,255,0.15);
  color: var(--uabc-blanco);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 700;
  font-family: var(--font-display);
  text-decoration: none;
  white-space: nowrap;
  min-height: 36px;
  transition: background 180ms ease;
}
.btn-header-admin:hover { background: rgba(255,255,255,0.25); }

/* ── Hamburger: touch target garantizado ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: background 180ms ease;
  flex-shrink: 0;
}
.nav-hamburger:hover { background: rgba(255,255,255,0.15); }
.hamburger-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--uabc-blanco);
  border-radius: 2px;
  transition: transform 250ms ease, opacity 250ms ease;
}

/* Línea dorada decorativa bajo el header-inner */
.header-gold-line {
  height: 3px;
  background: var(--uabc-dorado);
}

/* ══════════════════════════════
   NAV DESKTOP
══════════════════════════════ */
.site-nav {
  background: var(--uabc-verde-oscuro);
}
.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
.nav-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: rgba(255,255,255,0.80);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
  white-space: nowrap;
}
.nav-link:hover,
.nav-link.active {
  color: var(--uabc-dorado);
  border-bottom-color: var(--uabc-dorado);
}

/* ══════════════════════════════
   NAV MÓVIL
══════════════════════════════ */
.mobile-nav {
  display: none;
  background: var(--uabc-verde-oscuro);
  border-top: 1px solid rgba(255,255,255,0.1);
}
.mobile-nav.open { display: block; }
.mobile-nav-list { list-style: none; padding: var(--space-2) 0; }
.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  color: rgba(255,255,255,0.85);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  min-height: 44px;
  transition: background 180ms ease, color 180ms ease;
}
.mobile-nav-link:hover,
.mobile-nav-link:active { background: rgba(255,255,255,0.08); color: var(--uabc-dorado); }
.mobile-nav-link--admin {
  color: var(--uabc-dorado);
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: var(--space-1);
}
.mobile-nav-admin-item { padding-top: var(--space-1); }

/* ══════════════════════════════
   HERO
══════════════════════════════ */
.hero-section {
  background: linear-gradient(135deg, var(--uabc-verde) 0%, var(--uabc-verde-oscuro) 100%);
  padding-block: clamp(var(--space-12), 8vw, var(--space-20));
  color: var(--uabc-blanco);
}
.hero-section .container {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-8);
}
.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--space-4);
  color: var(--uabc-blanco);
}
.text-gold { color: var(--uabc-dorado); }
.hero-desc {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.88);
  margin-bottom: var(--space-6);
  max-width: 55ch;
}
.hero-cta { align-self: flex-start; }

.hero-card {
  display: flex;
  flex-direction: column;
}

/* ── Alumni logo: fluido, nunca distorsionado ── */
.hero-logo-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.hero-alumni-img {
  width: clamp(100px, 15vw, 180px);
  height: auto;
  display: block;
  object-fit: contain;
  filter: drop-shadow(0 4px 16px rgba(0,0,0,0.3));
}

/* ══════════════════════════════
   SECCIONES GENERALES
══════════════════════════════ */
.section {
  padding-block: clamp(var(--space-10), 6vw, var(--space-16));
}
.section--alt { background: var(--color-surface-2, #F9F9F9); }

.section-header {
  text-align: center;
  margin-bottom: var(--space-8);
}
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--uabc-verde);
  margin-bottom: var(--space-2);
}
.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 55ch;
  margin-inline: auto;
}

/* ══════════════════════════════
   EVENTS GRID
══════════════════════════════ */
.events-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
  gap: var(--space-5);
}
.events-loading-text {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-10);
}

/* Event card */
.event-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 200ms ease, transform 200ms ease;
}
.event-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.event-img-wrapper {
  aspect-ratio: 16 / 9;
  background: var(--uabc-verde);
  overflow: hidden;
}
.event-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.event-body {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1;
}
.event-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--uabc-verde);
}
.event-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.event-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.event-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  flex: 1;
}
.event-actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
}
.event-actions .btn { flex: 1; justify-content: center; }

/* Empty state */
.events-empty {
  text-align: center;
  padding: var(--space-16) var(--space-8);
}
.events-empty-icon {
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
  display: flex;
  justify-content: center;
}
.events-empty-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.events-empty-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  max-width: 40ch;
  margin-inline: auto;
}

/* ══════════════════════════════
   FAQ
══════════════════════════════ */
.faq-list { display: flex; flex-direction: column; gap: var(--space-2); }
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  min-height: 44px;
  transition: background 180ms ease, color 180ms ease;
}
.faq-trigger:hover { background: rgba(26,107,42,0.04); color: var(--uabc-verde); }
.faq-trigger[aria-expanded="true"] { color: var(--uabc-verde); }
.faq-icon {
  flex-shrink: 0;
  transition: transform 280ms cubic-bezier(0.16,1,0.3,1);
  color: var(--uabc-verde);
}
.faq-trigger[aria-expanded="true"] .faq-icon { transform: rotate(180deg); }
.faq-answer {
  padding: 0 var(--space-5) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}
.faq-answer p { max-width: none; }

/* ══════════════════════════════
   CONTACTO
══════════════════════════════ */
.contact-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  padding: var(--space-10) var(--space-8);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}
.contact-icon { color: var(--uabc-verde); }
.contact-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--uabc-verde);
}
.contact-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 42ch;
}

/* ══════════════════════════════
   FOOTER
══════════════════════════════ */
.site-footer {
  background: var(--uabc-verde-oscuro);
  color: rgba(255,255,255,0.7);
  padding-block: var(--space-8);
  border-top: 3px solid var(--uabc-dorado);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}
.footer-copy {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.6);
  max-width: 60ch;
}
.footer-tagline {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--uabc-dorado);
  font-style: italic;
}
.footer-credits {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.45);
  margin-top: var(--space-1);
}
.footer-credits p { max-width: none; }

/* ══════════════════════════════
   RESPONSIVE ≤ 768px (tablet/móvil)
══════════════════════════════ */
@media (max-width: 768px) {
  /* Header: reduce padding */
  .header-inner {
    padding: var(--space-3) var(--space-4);
  }

  /* Muestra hamburger, oculta nav desktop */
  .nav-hamburger { display: flex; }
  .site-nav { display: none; }

  /* Hero: una sola columna, logo arriba */
  .hero-section .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-card { align-items: center; }
  .hero-desc { max-width: 100%; }
  .hero-cta { align-self: center; }
  .hero-logo-wrapper {
    order: -1;
    margin-bottom: var(--space-4);
  }
  .hero-alumni-img {
    width: clamp(80px, 22vw, 120px);
  }
}

/* ══════════════════════════════
   RESPONSIVE ≤ 480px (móvil chico)
══════════════════════════════ */
@media (max-width: 480px) {
  /* Universidad: se oculta — el logo ya identifica la institución */
  .header-university { display: none; }

  .header-inner {
    padding: var(--space-3) var(--space-3);
    gap: var(--space-2);
  }

  .section { padding-block: var(--space-8); }
  .contact-card { padding: var(--space-8) var(--space-5); }
}

/* ══════════════════════════════
   RESPONSIVE ≤ 400px (iPhone SE)
══════════════════════════════ */
@media (max-width: 400px) {
  /* Oculta btn Admin del header — ya está en el menú móvil */
  .btn-header-admin { display: none; }

  .header-inner { padding-inline: var(--space-3); }
  .hero-alumni-img { width: clamp(64px, 20vw, 90px); }
}