/*
  Variables de diseño - Tema Oscuro (por defecto)
*/
:root {
  /* Altura del header para cálculos de offset */
  --header-h: 64px;
  --bg: #0a0d14;
  --surface: #0f1419;
  --text: #e8f0ff;
  --muted: #8ca3c7;
  --primary: #0ea5e9;
  --secondary: #06b6d4;
  --accent: #14b8a6;
  --primary-contrast: #0a0d14;
  --border: #1a2332;
  --shadow-color: rgba(14, 165, 233, 0.15);

  --radius: 12px;
  --shadow: 0 10px 25px rgba(0, 0, 0, 0.25);

  /* Tipografía y escala */
  --font-sans: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  --step--1: clamp(0.8rem, 0.82rem + 0.2vw, 0.95rem);
  --step-0: clamp(1rem, 1.02rem + 0.2vw, 1.125rem);
  --step-1: clamp(1.25rem, 1.18rem + 0.6vw, 1.5rem);
  --step-2: clamp(1.5rem, 1.35rem + 1vw, 2rem);
  --step-3: clamp(2rem, 1.8rem + 1.6vw, 2.5rem);
  --step-4: clamp(2.5rem, 2.2rem + 2vw, 3rem);

  /* Espaciado */
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4rem;
}

/* Tema Claro */
[data-theme="light"] {
  --bg: #f0f7ff;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --primary: #0284c7;
  --secondary: #0891b2;
  --accent: #0d9488;
  --primary-contrast: #ffffff;
  --border: #cbd5e1;
  --shadow-color: rgba(2, 132, 199, 0.1);
  --shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

/* Reset y base accesible */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: 
    radial-gradient(circle at 20% 10%, rgba(14, 165, 233, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 90%, rgba(20, 184, 166, 0.08) 0%, transparent 40%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
}

[data-theme="light"] body {
  background: 
    radial-gradient(circle at 20% 10%, rgba(2, 132, 199, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(8, 145, 178, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 40% 90%, rgba(13, 148, 136, 0.05) 0%, transparent 40%),
    var(--bg);
}
img, svg { display: block; max-width: 100%; }

.container {
  width: min(1100px, 100% - 2rem);
  margin-inline: auto;
}
.narrow { width: min(780px, 100% - 2rem); }
.section { padding: var(--space-6) 0; scroll-margin-top: calc(var(--header-h) + 4px); }
#inicio { scroll-margin-top: calc(var(--header-h) + 16px); }
.section-title {
  font-size: var(--step-2);
  line-height: 1.2;
  margin: 0 0 var(--space-4);
  position: relative;
}
.section-title::after {
  content: "";
  position: absolute;
  left: 0; bottom: -12px;
  width: 80px; height: 4px;
  border-radius: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    box-shadow: 0 2px 8px var(--shadow-color);
}

/* Enlace saltar al contenido */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: var(--primary-contrast);
  padding: var(--space-2) var(--space-3);
  border-radius: 0 0 var(--radius) 0;
  transition: top .2s ease;
}
.skip-link:focus { top: 0; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000; /* elevar por encima del scrim */
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  background: color-mix(in oklab, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--border);
}
.header-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  padding: 0.5rem 0;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.brand {
  display: inline-grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--primary-contrast);
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 4px 12px var(--shadow-color);
  transition: transform .2s ease, box-shadow .2s ease;
}
.brand:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--shadow-color);
}

/* Toggle tema (sol y luna) */
.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  position: relative;
  transition: background .2s ease, border-color .2s ease, transform .15s ease;
}
  .theme-toggle:hover { 
    background: color-mix(in oklab, var(--surface) 80%, var(--primary) 20%); 
    border-color: var(--primary); 
  }
  .theme-toggle svg {
    position: absolute;
    transition: opacity .25s ease, transform .25s ease;
  }
  .theme-toggle .sun-icon { opacity: 0; transform: rotate(-90deg) scale(0.8); }
  .theme-toggle .moon-icon { opacity: 1; transform: rotate(0deg) scale(1); }
  /* Estados invertidos en tema claro */
  [data-theme="light"] .theme-toggle .sun-icon { opacity: 1; transform: rotate(0deg) scale(1); }
  [data-theme="light"] .theme-toggle .moon-icon { opacity: 0; transform: rotate(90deg) scale(0.8); }

/* Boton hamburguesa */
.menu-toggle {
  display: inline-grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease, transform .15s ease, box-shadow .2s ease;
}
.menu-toggle:hover { background: color-mix(in oklab, var(--surface) 80%, var(--primary) 20%); border-color: var(--primary); box-shadow: 0 6px 14px var(--shadow-color); }
.menu-toggle .menu-svg { display: block; }
.menu-toggle .menu-svg line { stroke: currentColor; }

/* Botones, heroes y estilos generales */
.menu-icon, .menu-icon::before, .menu-icon::after {
  content: "";
  display: block;
  width: 20px; height: 2.5px;
  background: currentColor;
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease, top .2s ease;
}
.menu-icon { position: relative; }
.menu-icon::before { position: relative; top: -7px; }
.menu-icon::after { position: relative; top: 7px; }

/* Panel de navegación mobile (off-canvas) */
.nav-panel {
  position: fixed;
  top: 0; right: 0;
  height: 100dvh;
  width: min(320px, 85vw);
  background: color-mix(in oklab, var(--surface) 96%, #0a0d1f 4%);
  border-left: 1px solid var(--border);
  padding: calc(var(--header-h) + 0.75rem) 1rem 1rem;
  transform: translateX(100%);
  transition: transform .25s ease;
  z-index: 1010; /* por encima del scrim y header */
  pointer-events: auto;
  -webkit-overflow-scrolling: touch;
}
body.nav-open .nav-panel { transform: translateX(0%); }
.nav { list-style: none; margin: 0; padding: 0; display: grid; gap: .25rem; }
.nav a { color: var(--text); text-decoration: none; padding: .85rem .9rem; border-radius: 10px; display: block; font-weight: 500; }
.nav a:hover, .nav a:focus-visible {
  background: color-mix(in oklab, var(--surface) 85%, var(--primary) 15%);
}
[data-theme="light"] .nav a { color: var(--primary); }
[data-theme="light"] .nav a:hover,
[data-theme="light"] .nav a:focus-visible {
  background: color-mix(in oklab, var(--surface) 85%, var(--primary) 15%);
  color: var(--primary);
}

/* Scrim overlay */
.scrim[hidden] { display: none; }
.scrim { position: fixed; inset: 0; background: rgba(4,6,16,.6); backdrop-filter: blur(2px); z-index: 900; }

/* Evitar scroll de fondo cuando el menú está abierto */
body.nav-open { overflow: hidden; }

/* Menú en pantallaspequeñas (mobile) */
@media (min-width: 48em) {
  .header-wrap { display: grid; grid-template-columns: auto 1fr auto; align-items: center; }
  .nav-panel {
    position: static; height: auto; width: auto; padding: 0; transform: none;
    background: transparent; border: 0;
  }
  .nav { display: flex; gap: var(--space-3); justify-content: center; }
  .nav a { color: var(--muted); padding: .4rem .6rem; }
  [data-theme="light"] .nav a { color: var(--primary); }
  .header-actions { justify-self: end; }
  .menu-toggle { display: none; }
  .scrim { display: none !important; }
  .theme-toggle { background: transparent; border-color: transparent; }
  .theme-toggle:hover { background: color-mix(in oklab, var(--surface) 70%, transparent); border-color: var(--border); }
}

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* Seccion Hero */
.hero { padding-top: calc(var(--space-6) + 10px); }
.hero-grid { display: grid; gap: var(--space-5); align-items: center; }
.hero-visual { order: 1; justify-self: center; margin-bottom: var(--space-4); }
.hero-content { order: 2; }
.hero-content h1 { font-size: var(--step-4); margin: 0 0 var(--space-2); letter-spacing: -0.02em; }
.hero-role { font-size: var(--step-1); color: var(--muted); margin: 0 0 var(--space-3); }
.hero-sub { margin: 0 0 var(--space-4); max-width: 60ch; }
.badge { display: inline-block; margin-bottom: var(--space-3); padding: .35rem .6rem; font-weight: 600; font-size: .9rem; border-radius: 999px; border: 1px solid var(--border); }
.badge-available { background: color-mix(in oklab, var(--surface) 85%, var(--primary) 15%); color: var(--primary); }
[data-theme="light"] .badge-available { background: color-mix(in oklab, #ffffff 90%, var(--primary) 10%); }
.about-intro { margin: 0 0 var(--space-3); }
.about-list { margin: 0 0 var(--space-3); padding-left: 1.1rem; }
.about-list li { margin: .35rem 0; }
.about-extra { margin: 0; color: var(--muted); }
.visual-placeholder {
  width: 180px;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: linear-gradient(135deg,
    rgba(14, 165, 233, 0.15) 0%,
    rgba(6, 182, 212, 0.12) 50%,
    rgba(20, 184, 166, 0.15) 100%);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3),
              inset 0 1px 0 rgba(255, 255, 255, 0.1);
  border: 2px solid var(--border);
  position: relative;
  overflow: hidden;
  margin-inline: auto;
}
  [data-theme="light"] .visual-placeholder {
    background: linear-gradient(135deg, 
      rgba(2, 132, 199, 0.1) 0%, 
      rgba(8, 145, 178, 0.08) 50%, 
      rgba(13, 148, 136, 0.1) 100%);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1), 
                inset 0 1px 0 rgba(255, 255, 255, 0.5);
  }
.visual-placeholder::before {
  content: '';
  position: absolute;
  inset: -50%;
  background: linear-gradient(45deg, 
    transparent 30%, 
      rgba(14, 165, 233, 0.08) 50%, 
    transparent 70%);
  animation: shimmer 3s infinite;
}

/* Foto del avatar (opcional); se recorta al círculo */
.hero-photo { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero-photo[src=""], .hero-photo:not([src]) { display: none; }
@keyframes shimmer {
  0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
  100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}
.actions { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* Botones */
.btn {
  --btn-bg: var(--primary);
  --btn-fg: var(--primary-contrast);
  display: inline-flex; align-items: center; justify-content: center;
  gap: .5rem;
  padding: .75rem 1rem;
  border-radius: 10px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  text-decoration: none;
  font-weight: 600;
  transition: transform .15s ease, box-shadow .2s ease, opacity .2s ease;
}
.btn:hover { 
  transform: translateY(-2px); 
    box-shadow: 0 10px 30px var(--shadow-color),
                0 0 20px var(--shadow-color);
}
.btn:active { transform: translateY(0); }
.btn[aria-disabled="true"] { opacity: .6; pointer-events: none; }
.btn-secondary { --btn-bg: #1a1f34; --btn-fg: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { 
  background: #202749; 
  /* Sombra azul aún más sutil en tema oscuro */
  box-shadow: 0 6px 12px rgba(14, 165, 233, 0.12);
}
/* Variante clara para botón secundario (Descargar CV) */
[data-theme="light"] .btn-secondary { 
  --btn-bg: #f3faff; /* muy claro con tinte azul */
  --btn-fg: var(--primary); /* texto e icono azules */
  border-color: #bae6fd; /* azul claro para el borde */
}
[data-theme="light"] .btn-secondary:hover { 
  background: #e6f4ff; /* hover sutil */
  border-color: #93c5fd;
  /* Sombra azul muy ligera en tema claro */
  box-shadow: 0 6px 12px rgba(2, 132, 199, 0.10);
}

/* Tarjetas de tecnologias */
.tech-grid { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-3); grid-template-columns: repeat(2, minmax(0, 1fr)); }
.tech-card {
  display: grid; grid-template-columns: auto 1fr; align-items: center; gap: var(--space-3);
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 96%, transparent);
  padding: .9rem; border-radius: var(--radius);
  transition: transform .18s ease, border-color .25s ease, background .25s ease;
}
.tech-card img { width: 44px; height: 44px; filter: grayscale(10%) saturate(90%); transform: translateZ(0); transition: filter .25s ease, transform .18s ease; }
.tech-card span { font-weight: 600; }
.tech-card:hover { 
  transform: translateY(-4px); 
    border-color: var(--primary); 
  background: rgba(18, 20, 31, 0.8);
    box-shadow: 0 8px 24px var(--shadow-color),
                0 0 0 1px var(--primary) inset;
  }
  [data-theme="light"] .tech-card:hover {
    background: rgba(255, 255, 255, 0.9);
}

/* (eliminado) Estilos del scroller de tecnologías */
.tech-card:hover img { filter: none; transform: scale(1.03); }

/* Tarjetas de proyectos */
.projects-grid { display: grid; gap: var(--space-4); }
.project-card {
  display: grid; gap: 0;
  grid-template-rows: 160px auto;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: color-mix(in oklab, var(--surface) 92%, transparent);
  transition: transform .18s ease, box-shadow .25s ease, border-color .25s ease;
  will-change: transform, box-shadow;
  position: relative;
}
.project-card:hover { 
  /* Forzar a sobreponerse al transform inline de AOS */
  transform: translateY(-6px) scale(1.01) !important; 
  box-shadow: 0 10px 30px var(--shadow-color),
              0 0 20px var(--shadow-color);
  border-color: var(--primary); 
  z-index: 1;
}
.project-thumb { 
  background: linear-gradient(135deg, 
    rgba(14, 165, 233, 0.12), 
    rgba(6, 182, 212, 0.12), 
    rgba(20, 184, 166, 0.12));
  transition: filter .3s ease;
}
[data-theme="light"] .project-thumb {
  background: linear-gradient(135deg, 
    rgba(2, 132, 199, 0.08), 
    rgba(8, 145, 178, 0.08), 
    rgba(13, 148, 136, 0.08));
}
.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.project-card:hover .project-thumb { filter: brightness(1.15) saturate(1.2); }
.project-body { padding: var(--space-3); display: grid; gap: var(--space-3); }
.project-title { margin: 0; font-size: var(--step-1); }
.project-desc { margin: 0; color: var(--muted); }
.project-actions { display: flex; gap: var(--space-3); }
.link { color: var(--primary); text-decoration: none; font-weight: 600; }
.link:hover { text-decoration: underline; }

/* Seccion Contacto */
.contact-intro { color: var(--muted); margin-bottom: var(--space-3); }
.contact-cards { display: grid; gap: var(--space-3); grid-template-columns: repeat(3, minmax(0, 1fr)); }
.contact-card {
  display: grid; place-items: center;
  gap: .5rem; padding: 1rem; text-decoration: none; color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface);
  transition: transform .2s ease, background .2s ease, border-color .25s ease;
}
.contact-card:hover { 
  transform: translateY(-4px); 
  background: rgba(18, 20, 31, 0.9); 
  border-color: var(--secondary);
  box-shadow: 0 12px 24px var(--shadow-color),
              0 0 0 1px var(--secondary) inset;
}
[data-theme="light"] .contact-card:hover {
  background: rgba(255, 255, 255, 0.95);
}
.contact-emoji { font-size: 1.4rem; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: var(--space-4) 0; color: var(--muted); }
.site-footer p { margin: 0; text-align: center; }

/* Focus visible */
:focus-visible { 
  outline: 2px solid var(--primary); 
  outline-offset: 2px; 
  box-shadow: 0 0 0 4px var(--shadow-color);
}

/* Media queries - Diseño responsivo */
@media (min-width: 48em) {
  .hero-grid { grid-template-columns: 1.2fr 1fr; }
  .hero-content { order: 1; }
  .hero-visual { order: 2; margin-bottom: 0; justify-self: end; }
  .visual-placeholder { width: 260px; }
  .tech-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .projects-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 64em) {
  .projects-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .visual-placeholder { width: 320px; }
  .tech-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* Ajustes finos para pantallas pequeñas */
@media (max-width: 23.4375em) { /* 375px */
  .brand { width: 36px; height: 36px; border-radius: 8px; }
  .menu-toggle { width: 36px; height: 36px; border-radius: 8px; }
  .hero-content h1 { font-size: var(--step-3); }
  .visual-placeholder { height: 170px; }
  .contact-cards { grid-template-columns: 1fr 1fr 1fr; gap: .5rem; }
}

/* Adaptación de íconos al tema */
html:not([data-theme="light"]) .theme-invert {
  filter: brightness(0) invert(1);
}
html[data-theme="light"] .theme-invert {
  filter: brightness(0);
}