/* ============================================================
   Rafael García Álvarez — Portfolio
   Estilos base, layout y temas (claro / oscuro)
   ============================================================ */

/* -------- Variables de tema -------- */
:root {
  --accent: #8b7cff;
  --accent-2: #4dd0e1;
  --radius: 14px;
  --radius-sm: 10px;
  --maxw: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  --transition: 0.25s ease;
}

/* Tema oscuro (por defecto) */
[data-theme="dark"] {
  --bg: #0d1117;
  --bg-elev: #12171f;
  --surface: #161b22;
  --surface-2: #1c2230;
  --text: #e6edf3;
  --muted: #9aa4b2;
  --border: #262c38;
  --header-bg: rgba(13, 17, 23, 0.72);
}

/* Tema claro */
[data-theme="light"] {
  --bg: #f6f7fb;
  --bg-elev: #ffffff;
  --surface: #ffffff;
  --surface-2: #f0f2f8;
  --text: #1a1f2b;
  --muted: #5b6472;
  --border: #e5e8ee;
  --header-bg: rgba(246, 247, 251, 0.78);
  --shadow: 0 10px 30px rgba(20, 30, 60, 0.08);
}

/* -------- Reset básico -------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 0.4em; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* -------- Header -------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}
.brand-dot { color: var(--accent); }

.nav {
  display: flex;
  gap: 26px;
  margin-left: auto;
  margin-right: 20px;
}
.nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav a:hover { color: var(--text); }

.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.btn-icon:hover { border-color: var(--accent); transform: translateY(-1px); }

/* Iconos de tema: mostramos uno u otro según el tema activo */
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: none; }

/* -------- Botón hamburguesa (móvil) -------- */
.nav-toggle { flex-direction: column; gap: 4px; display: none; }
.nav-toggle span {
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* -------- Botones -------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.btn-primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #0b0f16;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); transform: translateY(-2px); }

/* -------- Hero -------- */
.hero {
  position: relative;
  padding: clamp(80px, 14vh, 150px) 0 90px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  left: 50%;
  width: 780px;
  height: 780px;
  max-width: 130vw;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(139, 124, 255, 0.22), transparent 60%);
  pointer-events: none;
  z-index: 0;
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: clamp(28px, 6vw, 72px);
}
.hero-text { flex: 1; min-width: 0; }
.hero-photo { flex-shrink: 0; }
.hero-photo img {
  width: clamp(180px, 22vw, 280px);
  height: clamp(180px, 22vw, 280px);
  border-radius: 50%;
  object-fit: cover;
  padding: 5px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: var(--shadow);
}
.hero-eyebrow {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin: 0 0 6px;
}
.hero-name {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0 0 10px;
}
.hero-role {
  font-size: clamp(1.1rem, 2.4vw, 1.5rem);
  color: var(--text);
  font-weight: 600;
  margin: 0 0 8px;
}
.hero-tagline {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 620px;
  margin: 0 0 28px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}
.hero-social { display: flex; gap: 12px; }

/* -------- Iconos sociales -------- */
.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
}
.social-link:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-3px); }
.social-link svg { width: 20px; height: 20px; }

/* -------- Secciones -------- */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-elev); }
.section-title {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 32px;
  position: relative;
  display: inline-block;
}
.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 46px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.subsection-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 56px 0 24px;
}
.about-text {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 760px;
}

/* -------- Skills -------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform var(--transition), border-color var(--transition);
}
.skill-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.skill-card h3 {
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 14px;
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 0.82rem;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
}

/* -------- Timeline (experiencia / formación) -------- */
.timeline {
  position: relative;
  padding-left: 26px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--border);
}
.timeline-item { position: relative; margin-bottom: 34px; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--bg);
}
.timeline-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: border-color var(--transition), transform var(--transition);
}
.section-alt .timeline-card { background: var(--bg); }
.timeline-card:hover { border-color: var(--accent); }
.tl-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 16px;
  align-items: baseline;
}
.tl-company { font-size: 1.2rem; font-weight: 700; }
.tl-meta { color: var(--muted); font-size: 0.9rem; }
.tl-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #0b0f16;
  margin-left: 8px;
  vertical-align: middle;
}
.tl-role { margin-top: 18px; }
.tl-role:first-of-type { margin-top: 14px; }
.tl-role-title { font-weight: 600; font-size: 1.02rem; }
.tl-role-dates { color: var(--muted); font-size: 0.85rem; margin-bottom: 8px; }
.tl-list { margin: 0; padding-left: 18px; color: var(--muted); }
.tl-list li { margin-bottom: 4px; }
.tl-grade { color: var(--muted); font-size: 0.9rem; margin-top: 8px; }
.tl-note {
  color: var(--muted);
  font-size: 0.82rem;
  font-style: italic;
  margin-top: 6px;
  opacity: 0.85;
}
.tl-note::before {
  content: "•";
  color: var(--accent);
  margin-right: 6px;
  font-style: normal;
}

/* -------- Cursos -------- */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}
.course-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  transition: border-color var(--transition), transform var(--transition);
}
.section-alt .course-card { background: var(--bg); }
.course-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.course-name { font-weight: 600; }
.course-issuer { color: var(--muted); font-size: 0.86rem; margin-top: 4px; }

/* -------- Proyectos -------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 22px;
}
.project-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.project-card:hover { transform: translateY(-6px); border-color: var(--accent); box-shadow: var(--shadow); }
.project-media {
  aspect-ratio: 16 / 9;
  background: linear-gradient(120deg, var(--surface-2), var(--bg-elev));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: 0.04em;
}
.project-media img { width: 100%; height: 100%; object-fit: cover; }
.project-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.project-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 4px; }
.project-tagline { color: var(--accent); font-size: 0.9rem; margin-bottom: 10px; }
.project-desc { color: var(--muted); font-size: 0.95rem; margin-bottom: 16px; }
.project-tech { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 18px; }
.project-links { display: flex; gap: 10px; margin-top: auto; }
.project-links a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.project-links a:hover { text-decoration: underline; }

/* -------- Contacto -------- */
.contact-inner { text-align: center; }
.contact-inner .section-title { display: inline-block; }
.contact-text { color: var(--muted); font-size: 1.1rem; margin-bottom: 26px; }
.contact-social { display: flex; justify-content: center; gap: 14px; }

/* -------- Footer -------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

/* -------- Animaciones de scroll -------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* -------- Responsive -------- */
@media (max-width: 760px) {
  .nav {
    position: fixed;
    inset: 64px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--border);
    padding: 8px 24px 16px;
    margin: 0;
    transform: translateY(-120%);
    transition: transform var(--transition);
  }
  .nav.open { transform: translateY(0); }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav-toggle { display: inline-flex; }

  .hero-inner { flex-direction: column-reverse; text-align: center; }
  .hero-tagline { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-social { justify-content: center; }
}

/* -------- Accesibilidad: reducir movimiento -------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { transition: none !important; }
}