/* ============================================================
   HOME / LANDING PAGE STYLES
   ============================================================ */

/* ── Header público ── */
.scroll-progress {
  position: absolute; top: 0; left: 0;
  width: 0; height: 3px;
  background: var(--color-accent);
  z-index: 101;
  transition: none;
  will-change: width;
}
.site-header {
  background: rgba(255,255,255,.97);
  border-bottom: 1px solid transparent;
  position: sticky; top: 0; z-index: 100;
  box-shadow: none;
  transition: box-shadow .3s ease, border-color .3s ease, backdrop-filter .3s ease;
}
.site-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 2px 16px rgba(0,0,0,.1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: var(--space-4); padding-bottom: var(--space-4);
}

.page-home { background: var(--color-bg); }

/* ── Hero ── */
.hero {
  background: var(--color-primary) url('/img/bg-hero.jpg') center center / cover no-repeat;
  background: var(--color-primary) url('/img/bg-hero.webp') center center / cover no-repeat;
  color: #fff;
  padding: clamp(4rem, 10vw, 7rem) 0 clamp(3rem, 8vw, 5rem);
  position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: rgba(30, 4, 16, 0.62);
  pointer-events: none;
}
.hero-inner {
  display: grid; grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-12); align-items: start;
  position: relative; z-index: 1;
}
.hero-text h1 {
  color: #fff;
  margin-bottom: var(--space-4);
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.1;
  letter-spacing: -.03em;
}
.hero-sub {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: rgba(255,255,255,.95);
  margin-bottom: var(--space-8);
  line-height: 1.7;
  max-width: 480px;
}
.hero-ctas {
  display: flex; gap: var(--space-3); flex-wrap: wrap;
}
.mobile-only { display: none; }
.desktop-only { display: inline; }
.hero-aside {
  text-align: left;
  align-self: start;
  margin-top: 13.7rem;
}
.hero-aside-title {
  font-size: 1.606rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}
.hero-aside-sub {
  font-size: 1.125rem;
  color: rgba(255,255,255,.75);
  margin-top: .2rem;
}
.hero-card {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  backdrop-filter: blur(8px);
}
.hero-stats { display: grid; grid-template-columns: repeat(2,1fr); gap: var(--space-3); margin-bottom: var(--space-5); }
.hero-stat {
  text-align: center; padding: var(--space-4);
  background: rgba(255,255,255,.08); border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,.1);
}
.hero-stat-num   { display: block; font-size: 1.75rem; font-weight: 800; color: #fff; line-height: 1; }
.hero-stat-label { display: block; font-size: .75rem; opacity: .75; margin-top: .2rem; letter-spacing: .04em; text-transform: uppercase; }
.hero-badge {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: rgba(163,133,96,.25);
  border: 1px solid rgba(163,133,96,.4);
  border-radius: var(--radius);
  font-size: 1rem; color: rgba(255,255,255,.92);
}
.hero-badge strong { font-size: 1.15rem; display: block; margin-bottom: .1rem; }
.hero-badge-icon { font-size: 1.6rem; flex-shrink: 0; }

/* ── Topics Preview ── */
.topics-preview { padding: clamp(3rem, 8vw, 5.5rem) 0; background: var(--color-bg); }
.section-intro { text-align: center; margin-bottom: var(--space-10); }
.section-intro h2 { margin-bottom: var(--space-3); }
.section-intro p  { color: var(--color-text-muted); font-size: 1rem; max-width: 520px; margin: 0 auto; }

/* ── Topic card flip ── */
.topic-icon-wrap {
  width: 72px; height: 72px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto var(--space-4);
  color: var(--color-primary);
}
.topic-icon-wrap svg { width: 64px; height: 64px; }
.topic-card h3 { margin-bottom: 0; font-size: 1rem; font-weight: 600; }
.topic-card p  { font-size: .86rem; color: var(--color-text-muted); line-height: 1.5; }
.topic-card {
  cursor: pointer; position: relative;
  perspective: 600px;
  background: none; border: none; box-shadow: none; padding: 0;
  -webkit-tap-highlight-color: transparent;
}
.topic-card-inner {
  position: relative; width: 100%;
  min-height: 200px;
  transition: transform .3s ease;
  transform-style: preserve-3d;
}
.topic-card.active .topic-card-inner { transform: rotateY(180deg); }
.topic-front, .topic-back {
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-xl);
  background: var(--color-card);
  box-shadow: var(--shadow-sm);
  padding: var(--space-8) var(--space-5) var(--space-6);
  text-align: center;
}
.topic-front {
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}
.topic-card:hover .topic-front { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
.topic-card.active:hover .topic-front { transform: none; box-shadow: none; }
.topic-back {
  position: absolute; inset: 0;
  transform: rotateY(180deg);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: var(--space-5);
}
.topic-back h3 { font-size: .9rem; font-weight: 700; color: var(--color-primary); margin-bottom: var(--space-2); }
.topic-back p  { font-size: .8rem; color: var(--color-text-muted); line-height: 1.5; margin: 0; }
.topic-card .topic-icon { font-size: 2.2rem; display: block; margin-bottom: var(--space-3); }

/* ── CTA Section ── */
.cta-section {
  background: var(--color-primary);
  text-align: center;
  padding: clamp(3.5rem, 8vw, 5.5rem) 0;
  position: relative; overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Ccircle cx='30' cy='30' r='1.5' fill='%23ffffff' fill-opacity='.05'/%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}
.cta-section h2 { color: #fff; margin-bottom: var(--space-3); position: relative; }
.cta-section p  { color: rgba(255,255,255,.95); margin-bottom: var(--space-8); font-size: 1.05rem; position: relative; }
.btn-cta {
  background: #fff; color: var(--color-primary) !important;
  border: 2px solid #fff; font-weight: 700;
  position: relative;
  box-shadow: 0 4px 18px rgba(0,0,0,.2);
}
.btn-cta:hover {
  background: var(--color-primary-light); color: var(--color-primary) !important;
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(0,0,0,.28);
  text-decoration: none;
}

/* ── Footer ── */
.site-footer {
  background: var(--color-primary);
  color: rgba(255,255,255,.6);
  padding: var(--space-8) 0 var(--space-4);
  font-size: .83rem;
  border-top: 3px solid var(--color-accent);
}
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--space-6); flex-wrap: wrap; }
.footer-col strong { color: #fff; font-size: .95rem; }
.footer-tagline { margin: var(--space-1) 0 0; font-size: .8rem; }
.footer-links { display: flex; gap: var(--space-4); }
.footer-links a { color: rgba(255,255,255,.6); text-decoration: none; transition: color var(--transition); }
.footer-links a:hover { color: var(--color-accent); }
.footer-social { display: inline-flex; align-items: center; gap: var(--space-2); color: rgba(255,255,255,.6); text-decoration: none; transition: color var(--transition); }
.footer-social:hover { color: var(--color-accent); }
.footer-bottom { text-align: center; margin-top: var(--space-6); padding-top: var(--space-4); border-top: 1px solid rgba(255,255,255,.1); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero {
    background-image: url('/img/bg-hero-mobile.jpg');
    background-image: url('/img/bg-hero-mobile.webp');
  }
  .hero-inner { grid-template-columns: 1fr; gap: var(--space-4); }
  .hero-aside  { text-align: left; margin-top: 0; }
  .mobile-only { display: inline; }
  .desktop-only { display: none; }
}
@media (max-width: 480px) {
  .topic-card { flex: 0 1 calc(50% - var(--space-4)); }
}