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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top right, rgba(139, 92, 246, 0.18), transparent 35%),
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.14), transparent 30%),
    linear-gradient(180deg, rgba(2, 6, 23, 0), rgba(15, 23, 42, .35)),
    var(--bg);
  color: var(--text);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.055) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, black, transparent 80%);
}

main {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.section {
  margin-top: 78px;
}

.current-section {
  margin-top: 34px;
}

.section-header {
  margin-bottom: 26px;
}

.section-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
}

.section-kicker {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--primary);
  font-weight: 900;
  letter-spacing: .15em;
  text-transform: uppercase;
  font-size: 13px;
}

.section-header h2 {
  font-size: clamp(32px, 4vw, 54px);
  line-height: 1;
  letter-spacing: -2px;
}

.section-header p {
  color: var(--muted);
  margin-top: 10px;
  max-width: 700px;
  line-height: 1.7;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 20px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 800;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  border: none;
  box-shadow: 0 16px 40px rgba(56, 189, 248, .18);
}

.btn-secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(10px);
}

.btn:hover {
  transform: translateY(-2px);
}

.footer {
  width: min(1180px, calc(100% - 40px));
  margin: 90px auto 30px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  color: var(--muted);
}

.footer-bottom {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 30px;
}

.footer-logo {
  color: var(--primary);
  font-weight: 900;
  font-size: 22px;
}

.footer-copy {
  text-align: center;
  color: var(--muted);
}

.footer-copy small {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
}

.footer-link {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--primary);
  box-shadow: var(--shadow);
  font-weight: 800;
  font-size: 15px;
  text-decoration: none;
  transition: .3s;
}

.footer-link:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
}

.scroll-top {
  position: fixed;
  right: 30px;
  bottom: 30px;
  width: 54px;
  height: 54px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: .3s;
  z-index: 999;
  box-shadow: 0 18px 44px rgba(56, 189, 248, .22);
}

.scroll-top.show {
  opacity: 1;
  transform: none;
}

@media (max-width: 800px) {
  .footer-bottom {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-logo,
  .footer-link {
    justify-self: center;
  }
}



/* RC1 final: accesibilidad y movimiento reducido */
.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 100000;
  transform: translateY(-140%);
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--primary, var(--color-primary));
  color: #fff;
  font-weight: 800;
  text-decoration: none;
  transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 3px solid rgba(56, 189, 248, .55);
  outline-offset: 3px;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}


/* =========================
   LIGHT THEME PREMIUM
========================= */

[data-theme="light"] body {
  background:
    radial-gradient(circle at top left, rgba(14, 165, 233, .18), transparent 34%),
    radial-gradient(circle at top right, rgba(124, 58, 237, .14), transparent 36%),
    linear-gradient(180deg, #ffffff 0%, #f8fafc 48%, #eef2ff 100%);
  color: var(--text);
}

[data-theme="light"] body::before {
  background-image:
    linear-gradient(rgba(15, 23, 42, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, .045) 1px, transparent 1px);
  opacity: .7;
}

[data-theme="light"] .navbar {
  background: rgba(255, 255, 255, .82);
  border-bottom: 1px solid #e2e8f0;
  backdrop-filter: blur(18px);
}

[data-theme="light"] .nav-links a {
  color: #475569;
}

[data-theme="light"] .nav-links a:hover,
[data-theme="light"] .nav-links a.active {
  color: #2563eb;
}

[data-theme="light"] .brand {
  color: #0f172a;
}

[data-theme="light"] .brand span,
[data-theme="light"] .footer-logo {
  background: linear-gradient(135deg, #0ea5e9, #7c3aed);
  -webkit-background-clip: text;
}

[data-theme="light"] .theme-toggle,
[data-theme="light"] .portfolio-menu-toggle {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  color: #0f172a;
  box-shadow: 0 10px 30px rgba(15, 23, 42, .08);
}

[data-theme="light"] .hero,
[data-theme="light"] .project-detail-page {
  color: #0f172a;
}

[data-theme="light"] .hero-description,
[data-theme="light"] .section-header p,
[data-theme="light"] .footer-copy,
[data-theme="light"] .footer-copy small {
  color: #475569;
}

[data-theme="light"] .stat-card,
[data-theme="light"] .info-card,
[data-theme="light"] .project-card,
[data-theme="light"] .blog-card,
[data-theme="light"] .tech-card,
[data-theme="light"] .timeline-item,
[data-theme="light"] .contact-section,
[data-theme="light"] .case-card,
[data-theme="light"] .project-side-card,
[data-theme="light"] .project-meta-item {
  background: rgba(255, 255, 255, .88);
  border: 1px solid #e2e8f0;
  box-shadow: 0 18px 45px rgba(15, 23, 42, .08);
}

[data-theme="light"] .stat-card:hover,
[data-theme="light"] .info-card:hover,
[data-theme="light"] .project-card:hover,
[data-theme="light"] .blog-card:hover,
[data-theme="light"] .tech-card:hover,
[data-theme="light"] .case-card:hover,
[data-theme="light"] .project-side-card:hover {
  box-shadow: 0 26px 60px rgba(15, 23, 42, .12);
}

[data-theme="light"] .btn-secondary,
[data-theme="light"] .footer-link {
  background: rgba(255, 255, 255, .9);
  color: #0f172a;
  border: 1px solid #e2e8f0;
}

[data-theme="light"] .btn-secondary:hover,
[data-theme="light"] .footer-link:hover {
  color: #2563eb;
}

[data-theme="light"] .project-techs span,
[data-theme="light"] .project-tech-cloud span,
[data-theme="light"] .tech-pill,
[data-theme="light"] .blog-meta,
[data-theme="light"] .publication-meta {
  background: #f1f5f9;
  border-color: #e2e8f0;
  color: #0f172a;
}

[data-theme="light"] .contact-form input,
[data-theme="light"] .contact-form textarea,
[data-theme="light"] .portfolio-search-input,
[data-theme="light"] .search-input {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  color: #0f172a;
}

[data-theme="light"] .contact-form input::placeholder,
[data-theme="light"] .contact-form textarea::placeholder,
[data-theme="light"] .portfolio-search-input::placeholder,
[data-theme="light"] .search-input::placeholder {
  color: #94a3b8;
}

[data-theme="light"] .footer {
  border-top: 1px solid #e2e8f0;
}

[data-theme="light"] .project-detail-hero {
  background:
    radial-gradient(circle at top left, rgba(14, 165, 233, .20), transparent 34%),
    radial-gradient(circle at bottom right, rgba(124, 58, 237, .16), transparent 38%),
    #ffffff;
  border: 1px solid #e2e8f0;
}

[data-theme="light"] .project-detail-hero::after {
  background:
    linear-gradient(to top, rgba(255,255,255,.96), rgba(255,255,255,.68), rgba(255,255,255,.12));
}

[data-theme="light"] .project-detail-summary,
[data-theme="light"] .case-card p,
[data-theme="light"] .project-side-card p,
[data-theme="light"] .project-meta-item span {
  color: #475569;
}

[data-theme="light"] .architecture-step {
  background: #eff6ff;
  border-color: #bfdbfe;
  color: #0f172a;
}

[data-theme="light"] .project-results {
  background:
    linear-gradient(135deg, rgba(34, 197, 94, .12), rgba(14, 165, 233, .08)),
    #ffffff;
}


.mini-list li{
  margin-left: 20px;
}