*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:       #0A192F;
  --primary-light: #132B50;
  --accent:        #64FFDA;
  --accent-dark:   #2EC4B6;
  --accent-text:   #0A192F;
  --white:         #FFFFFF;
  --gray-50:       #F8FAFC;
  --gray-100:      #E2E8F0;
  --gray-300:      #CBD5E0;
  --gray-500:      #718096;
  --gray-700:      #4A5568;
  --text:          #1A202C;
  --radius:        12px;
  --shadow:        0 4px 6px -1px rgba(10,25,47,.08), 0 2px 4px -1px rgba(10,25,47,.04);
  --shadow-md:     0 10px 15px -3px rgba(10,25,47,.1), 0 4px 6px -2px rgba(10,25,47,.05);
}

html { scroll-behavior: smooth; }
body { font-family: 'Inter', sans-serif; color: var(--text); background: var(--white); line-height: 1.6; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { display: block; max-width: 100%; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ═══ NAVBAR ═══ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10,25,47,0.6); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(100,255,218,.08);
  transition: background .3s, box-shadow .3s;
}
.navbar.scrolled { background: rgba(10,25,47,0.97); box-shadow: 0 2px 20px rgba(0,0,0,.3); }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px; gap: 16px;
}
.nav-logo-wrap { display: flex; align-items: center; gap: 12px; }
.group-back {
  font-size: .72rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: rgba(100,255,218,.7); border: 1px solid rgba(100,255,218,.25);
  padding: 4px 10px; border-radius: 6px; transition: all .2s; white-space: nowrap;
}
.group-back:hover { color: var(--accent); border-color: var(--accent); }
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo-img { height: 40px; width: auto; display: block; object-fit: contain; }

/* ── Patrones de marca (costados) ── */
.pattern-hero-bg,.pattern-cta-bg { position: relative; overflow: hidden; }
.pattern-hero-bg::after { content: ''; position: absolute; top: 0; right: -50px; bottom: 0; width: 520px; background-image: url('../img/patron-hub.svg'); background-size: contain; background-repeat: no-repeat; background-position: right center; opacity: .18; pointer-events: none; z-index: 0; }
.pattern-cta-bg::after { content: ''; position: absolute; top: 0; left: -50px; bottom: 0; width: 480px; background-image: url('../img/patron-hub.svg'); background-size: contain; background-repeat: no-repeat; background-position: left center; opacity: .15; pointer-events: none; z-index: 0; }

.logo-icon {
  width: 36px; height: 36px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-dark), var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 800; color: var(--primary); font-family: 'Poppins', sans-serif;
}
.logo-name { font-family: 'Poppins', sans-serif; font-weight: 700; font-size: 1rem; color: var(--white); }
.logo-sub { font-size: .65rem; color: var(--accent); font-weight: 500; letter-spacing: .03em; display: block; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links li a {
  font-size: .82rem; font-weight: 500; color: rgba(255,255,255,.8);
  padding: 6px 11px; border-radius: 6px; transition: all .2s; white-space: nowrap;
}
.nav-links li a:hover { color: var(--accent); background: rgba(100,255,218,.07); }
.nav-links li a.active { color: var(--accent); }
.dropdown { position: relative; }
.dropdown-menu {
  display: none; position: absolute; top: calc(100% + 8px); left: 0;
  background: var(--primary-light); border: 1px solid rgba(100,255,218,.15);
  border-radius: 10px; min-width: 210px; padding: 8px 0;
  box-shadow: 0 8px 24px rgba(0,0,0,.3);
}
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu li a { display: block; padding: 9px 16px; font-size: .82rem; color: rgba(255,255,255,.8); }
.dropdown-menu li a:hover { color: var(--accent); background: rgba(100,255,218,.07); }
.btn-donar {
  background: var(--accent); color: var(--primary); font-weight: 700;
  font-size: .82rem; padding: 8px 18px; border-radius: 8px;
  transition: all .2s; white-space: nowrap; font-family: 'Poppins', sans-serif;
}
.btn-donar:hover { background: var(--accent-dark); color: var(--white); transform: translateY(-1px); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--white); border-radius: 2px; transition: .3s; }

/* ═══ HERO ═══ */
.hero {
  min-height: 52vh; display: flex; align-items: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  position: relative; overflow: hidden; padding-top: 68px;
}
.hero-grid {
  position: absolute; inset: 0; opacity: .04;
  background-image: linear-gradient(var(--accent) 1px, transparent 1px),
    linear-gradient(90deg, var(--accent) 1px, transparent 1px);
  background-size: 48px 48px;
}
.hero-glow {
  position: absolute; top: -10%; right: -5%; width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(100,255,218,.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 1; text-align: center; max-width: 760px; margin: 0 auto; padding: 80px 0 64px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(100,255,218,.1); border: 1px solid rgba(100,255,218,.25);
  color: var(--accent); font-size: .78rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
  padding: 6px 14px; border-radius: 100px; margin-bottom: 24px;
}
.hero-title {
  font-family: 'Poppins', sans-serif; font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800; color: var(--white); line-height: 1.15; margin-bottom: 18px;
  letter-spacing: -.02em;
}
.hero-title .accent-text { color: var(--accent); }
.hero-subtitle { font-size: 1.08rem; color: rgba(255,255,255,.7); margin-bottom: 36px; max-width: 580px; margin-left: auto; margin-right: auto; }
.hero-ctas { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ═══ BUTTONS ═══ */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 26px; border-radius: 8px; font-weight: 600; font-size: .93rem; transition: all .25s; font-family: 'Poppins', sans-serif; cursor: pointer; border: none; }
.btn-accent { background: var(--accent); color: var(--primary); }
.btn-accent:hover { background: var(--accent-dark); color: var(--white); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(100,255,218,.25); }
.btn-outline { background: transparent; color: var(--accent); border: 1.5px solid rgba(100,255,218,.4); }
.btn-outline:hover { border-color: var(--accent); background: rgba(100,255,218,.08); transform: translateY(-2px); }
.btn-dark { background: var(--primary); color: var(--accent); border: 1.5px solid rgba(100,255,218,.3); font-family: 'Poppins', sans-serif; }
.btn-dark:hover { background: var(--primary-light); transform: translateY(-2px); }

/* ═══ SECTIONS ═══ */
section { padding: 88px 0; }
section.alt { background: var(--gray-50); }
section.dark { background: var(--primary); }
.section-eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: .75rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: var(--accent-dark); margin-bottom: 14px;
}
.section-eyebrow::before { content: ''; display: block; width: 24px; height: 2px; background: var(--accent-dark); border-radius: 2px; }
.section-eyebrow.light { color: rgba(100,255,218,.7); }
.section-eyebrow.light::before { background: rgba(100,255,218,.5); }
.section-title { font-family: 'Poppins', sans-serif; font-size: clamp(1.6rem, 3.5vw, 2.3rem); font-weight: 700; color: var(--text); line-height: 1.2; margin-bottom: 16px; }
.section-title.light { color: var(--white); }
.section-desc { font-size: 1rem; color: var(--gray-500); max-width: 600px; line-height: 1.75; }
.section-header { margin-bottom: 52px; }
.section-header.center { text-align: center; }
.section-header.center .section-desc { margin: 0 auto; }
.section-header.center .section-eyebrow { justify-content: center; }

/* ═══ CARDS ═══ */
.cards-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.cards-grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 28px; }
.card {
  background: var(--white); border-radius: var(--radius); padding: 36px 28px;
  border: 1px solid var(--gray-100); box-shadow: var(--shadow);
  transition: transform .25s, box-shadow .25s; position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent-dark), var(--accent));
  transform: scaleX(0); transform-origin: left; transition: transform .3s;
}
.card:hover::before { transform: scaleX(1); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card-icon { width: 52px; height: 52px; border-radius: 12px; background: rgba(46,196,182,.1); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin-bottom: 20px; }
.card h3 { font-family: 'Poppins', sans-serif; font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.card p { font-size: .88rem; color: var(--gray-500); line-height: 1.7; }

/* Dark cards */
.dark-card {
  background: rgba(255,255,255,.05); border: 1px solid rgba(100,255,218,.12);
  border-radius: var(--radius); padding: 32px;
  transition: background .25s, border-color .25s;
}
.dark-card:hover { background: rgba(100,255,218,.05); border-color: rgba(100,255,218,.3); }

/* ═══ FOOTER ═══ */
.footer { background: var(--primary); color: rgba(255,255,255,.75); padding: 72px 0 0; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 56px; }
.footer-brand p { font-size: .88rem; color: rgba(255,255,255,.55); line-height: 1.75; max-width: 280px; margin-bottom: 24px; }
.social-links { display: flex; gap: 10px; }
.social-btn {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.12);
  display: flex; align-items: center; justify-content: center; font-size: .85rem;
  transition: all .2s; color: rgba(255,255,255,.7); text-decoration: none;
}
.social-btn:hover { background: rgba(100,255,218,.15); border-color: rgba(100,255,218,.3); }
.footer-col h4 { font-family: 'Poppins', sans-serif; font-size: .88rem; font-weight: 700; color: var(--white); margin-bottom: 20px; letter-spacing: .03em; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a { font-size: .85rem; color: rgba(255,255,255,.55); transition: color .2s; }
.footer-col ul li a:hover { color: var(--accent); }
.footer-col address { font-style: normal; font-size: .85rem; color: rgba(255,255,255,.55); line-height: 1.75; }
.footer-col address a { color: rgba(255,255,255,.55); transition: color .2s; }
.footer-col address a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
.footer-bottom span { font-size: .8rem; color: rgba(255,255,255,.35); }
.footer-legal { display: flex; gap: 20px; }
.footer-legal a { font-size: .78rem; color: rgba(255,255,255,.35); transition: color .2s; }
.footer-legal a:hover { color: var(--accent); }

/* ═══ UTILITY ═══ */
.tag {
  display: inline-block; background: rgba(100,255,218,.1); color: var(--accent);
  font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 100px; margin-bottom: 16px;
}
.tag.green { background: rgba(34,197,94,.12); color: #15803d; }
.tag.yellow { background: rgba(234,179,8,.12); color: #a16207; }
.tag.red { background: rgba(239,68,68,.12); color: #b91c1c; }
.divider { border: none; border-top: 1px solid var(--gray-100); margin: 0; }

/* ═══ FORMS ═══ */
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: .82rem; font-weight: 600; color: var(--gray-700); }
.form-group input, .form-group textarea, .form-group select {
  padding: 10px 14px; border: 1px solid var(--gray-300); border-radius: 8px;
  font-size: .9rem; color: var(--text); font-family: 'Inter', sans-serif;
  transition: border-color .2s; background: var(--white);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--accent-dark); box-shadow: 0 0 0 3px rgba(46,196,182,.1);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-grid .span-2 { grid-column: 1 / -1; }
.form-box {
  background: var(--white); border: 1px solid var(--gray-100); border-radius: var(--radius);
  padding: 48px; box-shadow: var(--shadow);
}

/* ═══ FILTERS ═══ */
.filter-bar-hub {
  display: flex; gap: 12px; flex-wrap: wrap; align-items: center;
  background: var(--white); border: 1px solid var(--gray-100);
  border-radius: var(--radius); padding: 20px 24px; margin-bottom: 40px;
  box-shadow: var(--shadow);
}
.filter-search-hub { position: relative; flex: 1; min-width: 200px; }
.filter-search-hub input {
  width: 100%; padding: 9px 16px 9px 38px; border: 1px solid var(--gray-300); border-radius: 8px;
  font-size: .88rem; color: var(--text); font-family: 'Inter', sans-serif;
  transition: border-color .2s;
}
.filter-search-hub input:focus { outline: none; border-color: var(--accent-dark); }
.filter-search-hub::before { content: '🔍'; position: absolute; left: 12px; top: 50%; transform: translateY(-50%); font-size: .85rem; }
.filter-select-hub {
  padding: 9px 30px 9px 14px; border: 1px solid var(--gray-300); border-radius: 8px;
  font-size: .88rem; color: var(--text); font-family: 'Inter', sans-serif;
  cursor: pointer; transition: border-color .2s; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23718096' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center; background-color: var(--white);
}
.filter-select-hub:focus { outline: none; border-color: var(--accent-dark); }
.btn-filter-hub { padding: 9px 20px; border-radius: 8px; background: var(--primary); color: #fff; font-size: .85rem; font-weight: 600; cursor: pointer; border: none; transition: opacity .2s; }
.btn-filter-hub:hover { opacity: .85; }

/* ═══ PUBLICATION CARD ═══ */
.pub-card {
  background: var(--white); border: 1px solid var(--gray-100); border-radius: var(--radius);
  padding: 28px 32px; display: flex; gap: 20px; align-items: flex-start;
  box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s;
  margin-bottom: 16px;
}
.pub-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.pub-icon { font-size: 2rem; min-width: 48px; }
.pub-meta { flex: 1; }
.pub-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; }
.pub-title { font-family: 'Poppins', sans-serif; font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.pub-authors { font-size: .82rem; color: var(--gray-500); margin-bottom: 10px; }
.pub-desc { font-size: .88rem; color: var(--gray-700); line-height: 1.65; }
.pub-actions { display: flex; gap: 10px; margin-top: 14px; }
.btn-sm { padding: 7px 16px; font-size: .8rem; border-radius: 7px; font-weight: 600; transition: all .2s; border: none; cursor: pointer; }
.btn-sm-accent { background: var(--accent); color: var(--primary); }
.btn-sm-accent:hover { background: var(--accent-dark); color: var(--white); }
.btn-sm-outline { background: none; border: 1px solid var(--gray-300); color: var(--gray-700); }
.btn-sm-outline:hover { border-color: var(--accent-dark); color: var(--accent-dark); }

/* ═══ FADE-IN AOS ═══ */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.fade-in.visible { opacity: 1; transform: none; }
.fade-in.d1 { transition-delay: .1s; }
.fade-in.d2 { transition-delay: .2s; }
.fade-in.d3 { transition-delay: .3s; }

/* ═══ RESPONSIVE ═══ */
@media (max-width: 1024px) {
  .cards-grid { grid-template-columns: 1fr 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  section { padding: 64px 0; }
  .nav-links, .btn-donar { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column; position: fixed;
    top: 68px; left: 0; right: 0; background: var(--primary);
    padding: 24px; gap: 8px; border-bottom: 1px solid rgba(100,255,218,.1);
  }
  .nav-links.open li a { display: block; padding: 10px 14px; }
  .cards-grid { grid-template-columns: 1fr; }
  .cards-grid-2 { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .span-2 { grid-column: 1; }
  .group-back { display: none; }
  .form-box { padding: 28px 20px; }
}