/* ============================================================
   Asociación de Patólogos del Perú — Design System
   "The Digital Curator" | Manrope + Inter | 0px radius
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;700;800&family=Inter:wght@300;400;500;600&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200&display=swap');

/* ── Custom Properties (Design Tokens) ───────────────────── */
:root {
  /* Primary — Institutional Maroon */
  --primary:               #570013;
  --primary-container:     #800020;
  --on-primary:            #ffffff;
  --on-primary-container:  #ff828a;
  --primary-fixed:         #ffdada;
  --primary-fixed-dim:     #ffb3b5;

  /* Secondary — Academic Navy */
  --secondary:             #4c56af;
  --secondary-container:   #959efd;
  --on-secondary:          #ffffff;
  --on-secondary-container:#27308a;
  --secondary-fixed:       #e0e0ff;
  --secondary-fixed-dim:   #bdc2ff;

  /* Tertiary */
  --tertiary:              #371f37;
  --tertiary-container:    #4e354e;
  --on-tertiary:           #ffffff;
  --on-tertiary-container: #c09ebc;
  --tertiary-fixed:        #fdd7f7;
  --tertiary-fixed-dim:    #dfbcdb;

  /* Surface Scale */
  --background:                  #f9f9f9;
  --surface:                     #f9f9f9;
  --surface-dim:                 #dadada;
  --surface-bright:              #f9f9f9;
  --surface-container-lowest:    #ffffff;
  --surface-container-low:       #f3f3f3;
  --surface-container:           #eeeeee;
  --surface-container-high:      #e8e8e8;
  --surface-container-highest:   #e2e2e2;

  /* On-Surface */
  --on-surface:            #1a1c1c;
  --on-surface-variant:    #584141;
  --on-background:         #1a1c1c;

  /* Outline */
  --outline:               #8c7071;
  --outline-variant:       #e0bfbf;

  /* Inverse */
  --inverse-surface:       #2f3131;
  --inverse-primary:       #ffb3b5;
  --inverse-on-surface:    #f1f1f1;

  /* Error */
  --error:                 #ba1a1a;
  --error-container:       #ffdad6;
  --on-error:              #ffffff;
  --on-error-container:    #93000a;

  /* Surface Tint */
  --surface-tint:          #af2b3e;

  /* Typography */
  --font-headline: 'Manrope', sans-serif;
  --font-body:     'Inter', sans-serif;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;

  /* Shadows (tonal, no pure black) */
  --shadow-sm:   0 4px 16px rgba(26, 28, 28, 0.06);
  --shadow-md:   0 10px 32px rgba(26, 28, 28, 0.08);
  --shadow-lg:   0 20px 48px rgba(26, 28, 28, 0.10);

  /* Max width */
  --max-w:        80rem;  /* 1280px */
  --container-px: 1.5rem;
}

/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font-family: var(--font-body); }
ul { list-style: none; }
input, textarea, select {
  font-family: var(--font-body);
  outline: none;
}

/* Material Symbols */
.material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  display: inline-block;
  line-height: 1;
  text-transform: none;
  letter-spacing: normal;
  word-wrap: normal;
  white-space: nowrap;
  direction: ltr;
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
}

/* ── Layout Utilities ─────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--container-px);
}

.section-py     { padding-block: 6rem; }
.section-py-sm  { padding-block: 4rem; }

/* ── Navigation ───────────────────────────────────────────── */
#main-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(224,191,191,0.2);
  transition: box-shadow var(--transition-base);
}

#main-nav.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 1.25rem var(--container-px);
}

.nav-brand {
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--primary);
  letter-spacing: -0.01em;
  line-height: 1.2;
  max-width: 220px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--on-surface-variant);
  transition: color var(--transition-fast);
  position: relative;
  padding-bottom: 2px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-ghost {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--on-surface-variant);
  transition: color var(--transition-fast);
}

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

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  height: 2px;
  background: var(--on-surface);
  transition: transform var(--transition-base), opacity var(--transition-fast);
  transform-origin: center;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.nav-mobile {
  display: none;
  flex-direction: column;
  background: var(--surface-container-lowest);
  padding: 1.5rem var(--container-px);
  border-top: 1px solid var(--outline-variant);
  gap: 0.25rem;
}

.nav-mobile.open { display: flex; }

.nav-mobile a {
  font-size: 1rem;
  font-weight: 500;
  color: var(--on-surface);
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--outline-variant);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a:hover, .nav-mobile a.active { color: var(--primary); padding-left: 0.5rem; }

@media (max-width: 768px) {
  .nav-links, .nav-actions { display: none; }
  .hamburger { display: flex; }
  .nav-brand { font-size: 0.95rem; max-width: 180px; }
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 1rem 2.5rem;
  transition: all var(--transition-base);
  border-radius: 0;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-container));
  color: var(--on-primary);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-container), var(--primary));
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary-outline {
  background: transparent;
  color: var(--on-primary);
  border: 1.5px solid rgba(255,255,255,0.4);
  backdrop-filter: blur(8px);
}

.btn-primary-outline:hover {
  background: rgba(255,255,255,0.12);
}

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

.btn-secondary:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

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

.btn-white:hover {
  background: var(--primary-fixed);
}

.btn-sm {
  padding: 0.65rem 1.5rem;
  font-size: 0.75rem;
}

.btn-full { width: 100%; }

.btn-lg {
  font-size: 1rem;
  padding: 1.25rem 3rem;
}

/* ── Hero Section ─────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  background: var(--inverse-surface);
  overflow: hidden;
}

.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(87, 0, 19, 0.96) 0%,
    rgba(128, 0, 32, 0.75) 50%,
    transparent 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 6rem var(--container-px);
  width: 100%;
}

.hero-eyebrow {
  display: block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--font-headline);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  color: var(--on-primary);
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
  max-width: 14ch;
}

.hero-title em {
  font-style: normal;
  color: var(--primary-fixed-dim);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.88);
  max-width: 520px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
  font-weight: 300;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Hero Watermark */
.hero-watermark {
  position: absolute;
  bottom: -10%;
  right: -5%;
  width: 420px;
  height: 420px;
  border: 40px solid rgba(128,0,32,0.15);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.6;
}

/* ── Section Headers ──────────────────────────────────────── */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 4rem;
}

.section-title {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-rule {
  width: 4rem;
  height: 3px;
  background: var(--primary);
}

.section-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--secondary);
  transition: gap var(--transition-fast);
}

.section-link:hover { gap: 0.75rem; }

/* ── Research Bento Grid ──────────────────────────────────── */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: auto auto;
  gap: 1.25rem;
}

.bento-main {
  grid-column: span 2;
  grid-row: span 2;
  background: var(--surface-container-lowest);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-left: 6px solid var(--primary);
  transition: border-color var(--transition-base);
}

.bento-main:hover { border-color: var(--primary-container); }

.bento-card {
  background: var(--surface-container-low);
  padding: 2rem;
  transition: background var(--transition-fast);
}

.bento-card:hover { background: var(--surface-container-high); }

.bento-wide {
  grid-column: span 2;
  background: var(--primary-container);
  color: var(--on-primary);
  padding: 2.5rem;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.bento-wide img {
  width: 35%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) brightness(0.7);
  flex-shrink: 0;
}

.tag {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.tag-secondary { color: var(--secondary); }
.tag-tertiary  { color: var(--tertiary);  }
.tag-primary   { color: var(--primary);   }

.bento-main h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
  transition: color var(--transition-fast);
}

.bento-main:hover h3 { color: var(--primary); }

.bento-main p {
  color: var(--on-surface-variant);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.bento-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.link-pdf {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
}

.link-read {
  font-weight: 700;
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
  padding-bottom: 2px;
  font-size: 0.875rem;
}

.author-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ── Events Section ───────────────────────────────────────── */
.events-section {
  background: var(--surface-container-low);
  position: relative;
  overflow: hidden;
}

.events-section::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 35%;
  height: 100%;
  background: rgba(255,255,255,0.45);
  transform: skewX(-12deg) translateX(40%);
  pointer-events: none;
}

.events-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  position: relative;
  z-index: 1;
}

.events-sidebar h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.events-sidebar p {
  color: var(--on-surface-variant);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.webinar-card {
  background: var(--surface-container-lowest);
  padding: 2rem;
  border-top: 4px solid var(--primary);
  box-shadow: var(--shadow-sm);
}

.webinar-card h5 {
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.webinar-card .date {
  font-weight: 700;
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.webinar-card .topic {
  font-size: 0.8rem;
  color: var(--on-surface-variant);
  font-style: italic;
  margin-bottom: 1.5rem;
}

.event-list { display: flex; flex-direction: column; gap: 3rem; }

.event-item {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.event-date-block {
  text-align: center;
  min-width: 72px;
}

.event-day {
  display: block;
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--outline);
  line-height: 1;
  font-family: var(--font-headline);
}

.event-month {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--secondary);
}

.event-body {
  flex: 1;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(224,191,191,0.3);
}

.event-item:last-child .event-body { border-bottom: none; }

.event-category {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.5rem;
  display: block;
}

.event-body h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  transition: color var(--transition-fast);
}

.event-item:hover .event-body h3 { color: var(--primary); }

.event-body p {
  color: var(--on-surface-variant);
  margin-bottom: 1rem;
}

.link-underline {
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--primary);
  text-decoration: underline;
  text-decoration-color: var(--primary);
  text-underline-offset: 4px;
  text-decoration-thickness: 2px;
}

/* ── Certificate Section ──────────────────────────────────── */
.cert-section {
  background: var(--surface-container-lowest);
  border-top: 1px solid rgba(224,191,191,0.15);
  border-bottom: 1px solid rgba(224,191,191,0.15);
}

.cert-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.cert-eyebrow {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 1rem;
  display: block;
}

.cert-col h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--on-surface);
  margin-bottom: 1.5rem;
}

.cert-col p {
  color: var(--on-surface-variant);
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 2rem;
}

.cert-badge {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--surface-container-low);
  border-left: 4px solid var(--secondary);
}

.cert-badge .material-symbols-outlined { color: var(--secondary); font-size: 1.5rem; }
.cert-badge h6 { font-weight: 700; margin-bottom: 0.25rem; }
.cert-badge p { font-size: 0.85rem; margin: 0; }

/* Certificate Form */
.cert-form-wrap {
  background: var(--surface-container);
  padding: 3rem;
  box-shadow: var(--shadow-sm);
}

.cert-form-wrap h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.cert-form-wrap > p {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  margin-bottom: 2rem;
}

.form-group { margin-bottom: 1.5rem; }

.form-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  margin-bottom: 0.5rem;
}

.input-wrap {
  position: relative;
}

.input-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--outline);
  font-size: 1.25rem;
}

.form-input {
  width: 100%;
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  padding: 1rem 1rem 1rem 3.25rem;
  font-size: 0.9rem;
  color: var(--on-surface);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  border-radius: 0;
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(87,0,19,0.08);
}

.form-input::placeholder { color: var(--outline); }

.form-input-plain {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  padding: 0.875rem 0;
  font-size: 0.95rem;
  color: var(--on-primary);
  transition: border-color var(--transition-fast);
  border-radius: 0;
}

.form-input-plain:focus { border-bottom-color: var(--on-primary); }
.form-input-plain::placeholder { color: rgba(255,255,255,0.3); }

.cert-form-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(224,191,191,0.3);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--outline);
}

.cert-form-footer a { color: var(--secondary); }
.cert-form-footer a:hover { text-decoration: underline; }

/* Cert Result */
.cert-result {
  margin-top: 1.5rem;
  padding: 1.5rem;
  border-left: 4px solid var(--primary);
  background: var(--surface-container-lowest);
  display: none;
  animation: fadeIn 0.3s ease;
}

.cert-result.valid { border-color: #2d7a4f; background: #f0fff6; }
.cert-result.invalid { border-color: var(--error); background: var(--error-container); }
.cert-result.show { display: block; }

.cert-result h4 { font-weight: 700; margin-bottom: 0.5rem; }
.cert-result.valid h4 { color: #1a5c38; }
.cert-result.invalid h4 { color: var(--on-error-container); }
.cert-result dl { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 1rem; margin-top: 0.75rem; }
.cert-result dt { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--on-surface-variant); }
.cert-result dd { font-size: 0.875rem; font-weight: 600; }

/* ── Register Section ─────────────────────────────────────── */
.register-section {
  background: var(--tertiary);
  color: var(--on-primary);
  position: relative;
  overflow: hidden;
  padding-block: 7rem;
}

.register-section::before,
.register-section::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  border: 30px solid rgba(255,255,255,0.04);
  pointer-events: none;
}

.register-section::before {
  width: 480px;
  height: 480px;
  top: 50%;
  left: -120px;
  transform: translateY(-50%);
}

.register-section::after {
  width: 320px;
  height: 320px;
  top: -80px;
  right: -80px;
}

.register-inner {
  position: relative;
  z-index: 1;
  max-width: 56rem;
  margin-inline: auto;
  padding-inline: var(--container-px);
  text-align: center;
}

.register-tag {
  display: inline-block;
  padding: 0.25rem 1rem;
  border: 1px solid rgba(255,255,255,0.25);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 2rem;
}

.register-inner h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 1.5rem;
}

.register-inner > p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.7);
  max-width: 480px;
  margin: 0 auto 3rem;
  line-height: 1.7;
}

.register-form {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(10px);
  padding: 3rem;
  border: 1px solid rgba(255,255,255,0.1);
  text-align: left;
  box-shadow: var(--shadow-lg);
}

.register-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.form-group-dark label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 0.5rem;
}

.form-group-dark.full { grid-column: span 2; }

.register-fine {
  margin-top: 1.5rem;
  font-size: 0.75rem;
  text-align: center;
  color: rgba(255,255,255,0.35);
}

/* ── Footer ───────────────────────────────────────────────── */
#main-footer {
  background: var(--surface-container-low);
  border-top: 1px solid rgba(224,191,191,0.2);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 3rem;
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 4.5rem var(--container-px);
}

.footer-brand-name {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 0.95rem;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.footer-about {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  line-height: 1.7;
  max-width: 300px;
}

.footer-col h5 {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 1.25rem;
}

.footer-col ul { display: flex; flex-direction: column; gap: 0.75rem; }

.footer-col ul a {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  transition: color var(--transition-fast);
}

.footer-col ul a:hover { color: var(--primary); }

.footer-social {
  display: flex;
  align-items: flex-end;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-social h5 {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  align-self: flex-end;
}

.social-icons {
  display: flex;
  gap: 0.75rem;
}

.social-icon {
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--outline-variant);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--on-surface-variant);
  font-size: 1.1rem;
  transition: background var(--transition-base), color var(--transition-base);
}

.social-icon:hover {
  background: var(--primary);
  color: var(--on-primary);
  border-color: var(--primary);
}

.footer-copy {
  font-size: 0.65rem;
  color: var(--outline);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-align: right;
  line-height: 1.6;
}

.footer-bottom {
  border-top: 1px solid rgba(224,191,191,0.15);
  text-align: center;
  padding: 1.25rem;
  font-size: 0.75rem;
  color: var(--outline);
}

/* ── Interior Pages ───────────────────────────────────────── */
.page-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-container) 100%);
  color: var(--on-primary);
  padding: 5rem var(--container-px) 4rem;
  text-align: center;
}

.page-hero .eyebrow {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
  margin-bottom: 1rem;
  display: block;
}

.page-hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

.page-hero p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  max-width: 560px;
  margin-inline: auto;
}

/* Nosotros */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--inverse-surface);
  color: var(--inverse-on-surface);
}

.stat-item {
  padding: 2.5rem;
  border-right: 1px solid rgba(255,255,255,0.08);
  text-align: center;
}

.stat-item:last-child { border-right: none; }

.stat-number {
  font-family: var(--font-headline);
  font-size: 3rem;
  font-weight: 900;
  color: var(--primary-fixed-dim);
  line-height: 1;
  display: block;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  display: block;
  margin-top: 0.5rem;
}

/* Teams / Members Cards */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.team-card {
  background: var(--surface-container-lowest);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.team-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.team-card-photo {
  width: 100%;
  height: 220px;
  object-fit: cover;
  filter: grayscale(0.15);
  background: var(--surface-container);
}

.team-card-photo-placeholder {
  width: 100%;
  height: 220px;
  background: linear-gradient(135deg, var(--surface-container), var(--surface-container-high));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--outline);
  font-size: 3rem;
}

.team-card-body { padding: 1.5rem; }
.team-card-body h4 { font-size: 1rem; font-weight: 700; margin-bottom: 0.25rem; }
.team-card-body .role {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--secondary);
  margin-bottom: 0.5rem;
  display: block;
}
.team-card-body p { font-size: 0.85rem; color: var(--on-surface-variant); }

/* Publications */
.pub-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 3rem;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--outline-variant);
  color: var(--on-surface-variant);
  transition: all var(--transition-fast);
  cursor: pointer;
  background: transparent;
  border-radius: 0;
}

.filter-btn:hover, .filter-btn.active {
  background: var(--primary);
  color: var(--on-primary);
  border-color: var(--primary);
}

.pub-list { display: flex; flex-direction: column; gap: 0.5rem; }

.pub-item {
  background: var(--surface-container-lowest);
  padding: 2rem 2.5rem;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2rem;
  border-left: 4px solid transparent;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.pub-item:hover {
  border-left-color: var(--secondary);
  background: var(--surface-container-low);
}

.pub-item .vol { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; color: var(--secondary); margin-bottom: 0.5rem; display: block; }
.pub-item h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.5rem; }
.pub-item .authors { font-size: 0.85rem; color: var(--on-surface-variant); font-style: italic; }

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
}

.contact-info h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 2rem;
}

.contact-item .material-symbols-outlined { color: var(--primary); font-size: 1.5rem; flex-shrink: 0; margin-top: 0.1rem; }
.contact-item h6 { font-weight: 700; margin-bottom: 0.25rem; }
.contact-item p { font-size: 0.875rem; color: var(--on-surface-variant); }

.contact-form { background: var(--surface-container-low); padding: 3rem; }
.contact-form h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 2rem; color: var(--primary); }
.form-textarea { resize: vertical; min-height: 130px; padding-top: 1rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }

/* Alert messages */
.alert {
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  border-left: 4px solid;
  font-size: 0.875rem;
  font-weight: 500;
}

.alert-success { background: #f0fff6; border-color: #2d7a4f; color: #1a5c38; }
.alert-error   { background: var(--error-container); border-color: var(--error); color: var(--on-error-container); }

/* ── Animations ───────────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .bento-grid {
    grid-template-columns: 1fr 1fr;
  }
  .bento-main { grid-column: span 2; grid-row: span 1; }
  .bento-wide { grid-column: span 2; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-social { grid-column: span 2; flex-direction: row; align-items: center; }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hero-title { font-size: 3rem; }
  .bento-grid  { grid-template-columns: 1fr; }
  .bento-main  { grid-column: span 1; }
  .bento-wide  { grid-column: span 1; flex-direction: column; }
  .bento-wide img { width: 100%; height: 180px; }
  .events-grid { grid-template-columns: 1fr; gap: 3rem; }
  .cert-grid   { grid-template-columns: 1fr; gap: 2.5rem; }
  .register-form-grid { grid-template-columns: 1fr; }
  .register-form { padding: 2rem; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-social { flex-direction: column; align-items: flex-start; }
  .footer-copy { text-align: left; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
  .cert-form-wrap { padding: 2rem; }
  .team-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
  .section-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .pub-item { grid-template-columns: 1fr; }
  .page-hero { padding: 4rem var(--container-px) 3rem; }
}

@media (max-width: 480px) {
  :root { --container-px: 1.25rem; }
  .hero-title { font-size: 2.5rem; }
  .btn { padding: 0.875rem 1.75rem; font-size: 0.8rem; }
  .bento-main { padding: 1.75rem; }
  .stat-item { padding: 1.75rem 1rem; }
  .stat-number { font-size: 2.25rem; }
}