/* ============================================================
   DESIGN SYSTEM — variables
   ============================================================ */
:root {
  /* Colores base (modo claro) */
  --bg: #FAFAFA;
  --bg-alt: #FFFFFF;
  --bg-dark: #0D1117;
  --bg-dark-alt: #161B22;
  --text: #0D1117;
  --text-muted: #4B5563;
  --text-on-dark: #F0F6FC;
  --text-on-dark-muted: #9CA3AF;
  --border: #E5E7EB;
  --border-dark: #30363D;

  /* Acentos */
  --accent: #2563EB;
  --accent-hover: #1D4ED8;
  --accent-green: #10B981;

  /* Tipografía */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Espaciados */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 20px rgba(13, 17, 23, 0.06);
  --shadow-lg: 0 12px 40px rgba(13, 17, 23, 0.12);

  --transition: 0.25s ease;
}

[data-theme="dark"] {
  --bg: #0D1117;
  --bg-alt: #161B22;
  --text: #F0F6FC;
  --text-muted: #9CA3AF;
  --border: #30363D;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; font-size: 1rem; }

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}
.logo-bracket { color: var(--accent); }
.accent { color: var(--accent); }

.main-nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
}
.main-nav a:hover { color: var(--accent); }

.header-controls { display: flex; align-items: center; gap: 0.75rem; }

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  color: var(--text);
  transition: background var(--transition);
}
.icon-btn:hover { background: var(--border); }

.lang-btn {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--accent);
  border: 1.5px solid var(--border);
}
.lang-btn:hover { border-color: var(--accent); background: var(--border); }

.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
}
.menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: transform var(--transition), opacity var(--transition);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: var(--shadow); }

.btn-secondary {
  background: var(--text);
  color: var(--bg);
}
.btn-secondary:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

.btn-ghost {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn-nav {
  padding: 0.55rem 1.2rem;
  background: var(--accent);
  color: #fff !important;
}
.btn-nav:hover { background: var(--accent-hover); }

.btn-sm { padding: 0.55rem 1.2rem; font-size: 0.88rem; }
.btn-block { width: 100%; }
.btn-disabled { opacity: 0.55; cursor: not-allowed; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding: var(--space-2xl) 0 var(--space-xl);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-xl);
  align-items: center;
}

.eyebrow {
  font-family: var(--font-mono);
  color: var(--accent-green);
  font-size: 0.95rem;
  margin-bottom: var(--space-sm);
}

.hero-text h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.role {
  font-size: 1.15rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.hero-pitch {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 42ch;
  margin-bottom: var(--space-lg);
}

.hero-cta { display: flex; flex-wrap: wrap; gap: 0.9rem; }

.hero-visual {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
}

.photo-frame {
  position: relative;
  width: 220px;
  height: 220px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}
.photo-frame img { width: 100%; height: 100%; object-fit: cover; }
.photo-fallback {
  display: none;
  position: absolute;
  inset: 0;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-dark), #1c2530);
  color: var(--accent-green);
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
}

.terminal-block {
  width: 100%;
  max-width: 360px;
  background: var(--bg-dark);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-dark);
}

.terminal-titlebar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.6rem 0.9rem;
  background: var(--bg-dark-alt);
  border-bottom: 1px solid var(--border-dark);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-red { background: #FF5F56; }
.dot-yellow { background: #FFBD2E; }
.dot-green { background: #27C93F; }
.terminal-title {
  margin-left: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-on-dark-muted);
}

.terminal-body {
  padding: 1rem 1.1rem 1.3rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.terminal-body p { margin-bottom: 0.5rem; color: var(--text-on-dark); }
.prompt { color: var(--accent-green); margin-right: 0.4rem; }
.terminal-out { color: var(--text-on-dark-muted); padding-left: 1.1rem; }
.cursor { color: var(--accent-green); animation: blink 1s step-end infinite; }

@keyframes blink { 50% { opacity: 0; } }

/* ============================================================
   SECTIONS (general)
   ============================================================ */
.section { padding: var(--space-2xl) 0; }

.section-dark {
  background: var(--bg-dark);
  color: var(--text-on-dark);
}
.section-dark .section-subtitle,
.section-dark .experience-company,
.section-dark p { color: var(--text-on-dark-muted); }
.section-dark h3, .section-dark h4 { color: var(--text-on-dark); }

.section-tag {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}
.section-dark .section-tag { color: var(--accent-green); }

.section-title {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.01em;
}

.section-subtitle {
  color: var(--text-muted);
  max-width: 60ch;
  margin-bottom: var(--space-lg);
}

.sub-heading {
  font-size: 1.25rem;
  margin: var(--space-xl) 0 var(--space-md);
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: var(--space-xl);
  margin-top: var(--space-lg);
}
.about-text p { color: var(--text-muted); margin-bottom: var(--space-md); }
.about-text strong { color: var(--text); }

.about-highlights { display: flex; flex-direction: column; gap: var(--space-md); }
.highlight-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-md);
  box-shadow: var(--shadow);
}
.highlight-icon { font-size: 1.6rem; display: block; margin-bottom: 0.5rem; }
.highlight-card h3 { font-size: 1rem; margin-bottom: 0.3rem; }
.highlight-card p { color: var(--text-muted); font-size: 0.92rem; }

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.skill-category h3 {
  font-size: 1rem;
  color: var(--accent-green);
  margin-bottom: var(--space-sm);
  font-family: var(--font-mono);
}

.badge-list { display: flex; flex-wrap: wrap; gap: 0.6rem; }

.badge {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  background: var(--bg-dark-alt);
  border: 1px solid var(--border-dark);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--text-on-dark);
}
.badge i { font-size: 1rem; }

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.project-card {
  background: var(--bg-dark-alt);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
}

.project-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-md);
  font-size: 2.2rem;
}
.project-banner[data-tone="a"] { background: linear-gradient(135deg, #1e3a8a, #2563EB); }
.project-banner[data-tone="b"] { background: linear-gradient(135deg, #065f46, #10B981); }
.project-banner[data-tone="c"] { background: linear-gradient(135deg, #7c2d12, #ea580c); }
.project-banner[data-tone="d"] { background: linear-gradient(135deg, #4c1d95, #7c3aed); }
.project-banner[data-tone="e"] { background: linear-gradient(135deg, #0f172a, #334155); }
.project-banner[data-tone="f"] { background: linear-gradient(135deg, #831843, #db2777); }

.project-status {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.status-live { background: rgba(16, 185, 129, 0.2); color: #34D399; }
.status-progress { background: rgba(251, 191, 36, 0.2); color: #FBBF24; }

.project-body { padding: var(--space-md); display: flex; flex-direction: column; flex: 1; }
.project-body h3 { color: var(--text-on-dark); font-size: 1.15rem; margin-bottom: 0.6rem; }
.project-desc { color: var(--text-on-dark-muted); font-size: 0.92rem; margin-bottom: 0.8rem; }
.project-note { border-left: 2px solid var(--accent); padding-left: 0.7rem; }

.tech-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.9rem; }
.tech-tags li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-green);
  border: 1px solid var(--border-dark);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
}

.project-role {
  font-size: 0.82rem;
  color: var(--text-on-dark-muted);
  margin-bottom: 1rem;
  font-style: italic;
}

.project-body .btn { margin-top: auto; align-self: flex-start; }

/* ============================================================
   TIMELINE (formación)
   ============================================================ */
.timeline {
  position: relative;
  margin-top: var(--space-lg);
  padding-left: var(--space-lg);
  border-left: 2px solid var(--border);
}

.timeline-item { position: relative; padding-bottom: var(--space-lg); }
.timeline-item:last-child { padding-bottom: 0; }

.timeline-marker {
  position: absolute;
  left: calc(-1 * var(--space-lg) - 6px);
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  font-weight: 600;
}
.timeline-content h3 { margin: 0.3rem 0 0.2rem; font-size: 1.1rem; }
.timeline-institution { color: var(--text-muted); font-weight: 600; margin-bottom: 0.4rem; font-size: 0.92rem; }
.timeline-content p { color: var(--text-muted); font-size: 0.94rem; }
.timeline-content em { color: var(--text); }

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-md);
}
.cert-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-green);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  box-shadow: var(--shadow);
}
.cert-card h4 { font-size: 0.98rem; margin-bottom: 0.3rem; }
.cert-card p { color: var(--text-muted); font-size: 0.88rem; }

/* ============================================================
   EXPERIENCE
   ============================================================ */
.experience-card {
  margin-top: var(--space-lg);
  background: var(--bg-dark-alt);
  border: 1px solid var(--border-dark);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: var(--space-lg);
}
.experience-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.3rem;
}
.experience-header h3 { color: var(--text-on-dark); font-size: 1.2rem; }
.experience-date { font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent-green); }
.experience-company { font-weight: 600; margin-bottom: 0.8rem; }
.experience-card p { margin-bottom: 1rem; }
.experience-card .tech-tags li { color: var(--text-on-dark); }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.contact-list { margin-top: var(--space-lg); display: flex; flex-direction: column; gap: var(--space-sm); }
.contact-list a {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: border-color var(--transition), color var(--transition);
}
.contact-list a:hover { border-color: var(--accent); color: var(--accent); }
.contact-list i { font-size: 1.2rem; }

.contact-form {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label { font-size: 0.88rem; font-weight: 600; }
.form-group input, .form-group textarea {
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  transition: border-color var(--transition);
}
.form-group input:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-note { font-size: 0.85rem; color: var(--accent-green); min-height: 1.2em; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--bg-dark);
  color: var(--text-on-dark-muted);
  padding: var(--space-lg) 0;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.88rem;
}
.footer-links { display: flex; gap: var(--space-md); }
.footer-links a:hover { color: var(--accent-green); }

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .about-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .main-nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }
  .main-nav.is-open { max-height: 400px; }
  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-sm) 1.5rem var(--space-md);
  }
  .main-nav li { width: 100%; padding: 0.7rem 0; border-bottom: 1px solid var(--border); }
  .main-nav .btn-nav { display: inline-flex; margin-top: 0.7rem; }
  .menu-toggle { display: flex; }
  .role-break { display: none; }
  .skills-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; align-items: stretch; }
  .terminal-block { max-width: 100%; }
}