/* ============================================
   PORTAFOLIO — David Calderón
   Identidad: consola de monitoreo de red / señal
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --paper: #ECEFEA;
  --paper-elevated: #F9FAF7;
  --ink: #10182B;
  --ink-deep: #060A14;
  --signal: #2FBF83;
  --signal-soft: #34D399;
  --amber: #E8A33D;
  --slate: #5C6B7A;
  --line: rgba(16, 24, 43, 0.12);

  --bg: var(--paper);
  --bg-elevated: var(--paper-elevated);
  --text: var(--ink-deep);
  --text-muted: var(--slate);
  --border: var(--line);
  --accent: var(--signal);
  --accent-text: #06120C;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 6px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: var(--ink-deep);
  --bg-elevated: #0E1626;
  --text: #E8ECE6;
  --text-muted: #8C9AAA;
  --border: rgba(232, 236, 230, 0.12);
  --accent: var(--signal-soft);
  --accent-text: #06120C;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.65;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent);
}

.section-title {
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  margin-bottom: 8px;
}

.section { padding: 90px 0; }
.section-intro { max-width: 600px; margin-bottom: 44px; }
.section-intro p { color: var(--text-muted); margin-top: 12px; }

/* ---------- NAV ---------- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; max-width: 1160px; margin: 0 auto;
}
.brand {
  font-family: var(--font-mono); font-weight: 500; font-size: 1rem;
  display: flex; align-items: center; gap: 10px;
}
.brand .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent); }

.nav-links { display: flex; gap: 26px; list-style: none; font-size: 0.9rem; font-weight: 500; }
.nav-links a { position: relative; padding: 4px 0; color: var(--text-muted); }
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px;
  background: var(--accent); transition: width var(--transition);
}
.nav-links a:hover, .nav-links a.active-link { color: var(--text); }
.nav-links a:hover::after, .nav-links a.active-link::after { width: 100%; }

.nav-controls { display: flex; align-items: center; gap: 10px; }
.icon-btn {
  background: transparent; border: 1px solid var(--border); border-radius: 50%;
  width: 38px; height: 38px; display: flex; align-items: center; justify-content: center;
  color: var(--text); transition: border-color var(--transition), transform var(--transition);
}
.icon-btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.icon-btn svg { width: 17px; height: 17px; }
[data-theme="dark"] .icon-btn .icon-sun { display: block; }
[data-theme="dark"] .icon-btn .icon-moon { display: none; }
.icon-btn .icon-sun { display: none; }
.icon-btn .icon-moon { display: block; }

.lang-btn {
  font-family: var(--font-mono); font-size: 0.76rem; font-weight: 500;
  background: transparent; border: 1px solid var(--border); border-radius: 20px;
  padding: 7px 14px; color: var(--text); transition: border-color var(--transition);
}
.lang-btn:hover { border-color: var(--accent); }

.nav-toggle { display: none; background: none; border: none; width: 32px; height: 24px; position: relative; }
.nav-toggle span { display: block; position: absolute; left: 0; right: 0; height: 2px; background: var(--text); transition: var(--transition); }
.nav-toggle span:nth-child(1) { top: 0; }
.nav-toggle span:nth-child(2) { top: 11px; }
.nav-toggle span:nth-child(3) { top: 22px; }

/* ---------- HERO ---------- */
.hero {
  min-height: 100vh; display: flex; align-items: center; position: relative;
  padding-top: 80px;
  background:
    radial-gradient(ellipse 70% 55% at 75% 15%, color-mix(in srgb, var(--signal) 12%, transparent), transparent),
    var(--bg);
}
.hero-inner { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }

.hero-copy h1 { font-size: clamp(2.4rem, 5vw, 3.9rem); line-height: 1.08; }
.hero-copy .accent-word { color: var(--accent); }
.hero-copy p { margin-top: 20px; font-size: 1.08rem; color: var(--text-muted); max-width: 480px; }

.hero-cta { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 13px 24px;
  border-radius: var(--radius); font-weight: 600; font-size: 0.92rem;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: var(--accent-text); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 24px -8px color-mix(in srgb, var(--accent) 55%, transparent); }
.btn-outline { border-color: var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); }

.hero-stack {
  display: flex; gap: 10px; flex-wrap: wrap; margin-top: 30px;
}
.stack-tag {
  font-family: var(--font-mono); font-size: 0.76rem;
  border: 1px solid var(--border); border-radius: 20px; padding: 6px 12px;
  color: var(--text-muted);
}

.hero-visual { position: relative; display: flex; align-items: center; justify-content: center; }
.net-scene { width: 100%; max-width: 420px; }
.net-node { fill: var(--bg-elevated); stroke: var(--border); stroke-width: 1.5; }
.net-node.active { stroke: var(--accent); }
.net-link { stroke: var(--border); stroke-width: 1.5; fill: none; }
.net-pulse {
  fill: var(--accent);
  offset-path: path("M40,180 L140,90 L220,140 L310,60 L380,120");
  animation: travel 3.2s linear infinite;
}
@keyframes travel {
  0% { offset-distance: 0%; opacity: 0; }
  8% { opacity: 1; }
  92% { opacity: 1; }
  100% { offset-distance: 100%; opacity: 0; }
}
.net-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  fill: var(--text-muted);
}

/* ---------- SOBRE MI ---------- */
.split { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 56px; align-items: start; }

.photo-frame {
  aspect-ratio: 3/4; border-radius: var(--radius);
  background: linear-gradient(160deg, var(--ink), var(--ink-deep));
  overflow: hidden;
  border: 1px solid var(--border);
}

.photo-frame img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: center 20%;
  display: block;
}

.about-list { list-style: none; margin-top: 24px; display: grid; gap: 14px; }
.about-list li { display: flex; gap: 12px; font-size: 0.95rem; color: var(--text-muted); }
.about-list li svg { width: 18px; height: 18px; color: var(--accent); flex-shrink: 0; margin-top: 2px; }

/* ---------- FORMACION (timeline) ---------- */
.timeline { position: relative; padding-left: 28px; border-left: 2px solid var(--border); display: grid; gap: 36px; }
.timeline-item { position: relative; }
.timeline-item::before {
  content: ''; position: absolute; left: -34px; top: 4px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--accent);
}
.timeline-item .eyebrow { margin-bottom: 4px; }
.timeline-item h3 { font-size: 1.15rem; margin-bottom: 4px; }
.timeline-item p { color: var(--text-muted); font-size: 0.94rem; }

/* ---------- HABILIDADES ---------- */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.skill-card {
  background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px;
}
.skill-card .cat { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent); text-transform: uppercase; letter-spacing: 0.08em; }
.skill-card h4 { margin: 10px 0 12px; font-size: 1.05rem; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-family: var(--font-mono); font-size: 0.76rem; padding: 5px 10px;
  border: 1px solid var(--border); border-radius: 4px; color: var(--text-muted);
}

/* ---------- EXPERIENCIA ---------- */
.exp-grid { display: grid; gap: 20px; }
.exp-card {
  display: grid; grid-template-columns: 200px 1fr; gap: 24px;
  padding: 26px 0; border-bottom: 1px solid var(--border);
}
.exp-card .exp-period { font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-muted); }
.exp-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.exp-card p { color: var(--text-muted); font-size: 0.95rem; }

/* ---------- PROYECTOS ---------- */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.project-card {
  background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: transform var(--transition), border-color var(--transition);
  display: flex; flex-direction: column;
}
.project-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.project-photo {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--ink), var(--ink-deep));
  display: flex; align-items: center; justify-content: center;
  color: var(--slate); font-family: var(--font-mono); font-size: 0.72rem;
  text-align: center; padding: 14px;
}
.project-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.project-body h4 { font-family: var(--font-display); font-size: 1.1rem; margin-bottom: 8px; }
.project-body p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 14px; flex: 1; }
.project-body .tag-row { margin-bottom: 14px; }
.project-link { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent); display: inline-flex; align-items: center; gap: 6px; }

/* ---------- CONTACTO ---------- */
.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 48px; }
.map-frame { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); aspect-ratio: 4/3; margin-top: 24px; }
.map-frame iframe { width: 100%; height: 100%; border: 0; }

.info-row { display: flex; gap: 14px; margin-top: 16px; align-items: flex-start; }
.info-row svg { width: 19px; height: 19px; flex-shrink: 0; color: var(--accent); margin-top: 2px; }
.social-row { display: flex; gap: 12px; margin-top: 22px; }

.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.8rem; font-family: var(--font-mono); color: var(--text-muted); margin-bottom: 8px; }
.form-group input, .form-group textarea {
  width: 100%; background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 13px 14px; color: var(--text); font-family: var(--font-body); font-size: 0.95rem;
  transition: border-color var(--transition);
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--accent); outline: none; }
.form-group textarea { resize: vertical; min-height: 120px; }

.form-status { margin-top: 16px; font-size: 0.88rem; padding: 12px 16px; border-radius: var(--radius); display: none; }
.form-status.ok { display: block; background: color-mix(in srgb, var(--signal) 18%, transparent); color: var(--signal); border: 1px solid var(--signal); }
.form-status.err { display: block; background: color-mix(in srgb, #C9503A 18%, transparent); color: #C9503A; border: 1px solid #C9503A; }

/* ---------- FOOTER ---------- */
footer { border-top: 1px solid var(--border); padding: 44px 0 26px; margin-top: 30px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 18px; }
.footer-brand { font-family: var(--font-mono); font-size: 0.95rem; }
.footer-note { font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; }

/* ---------- FADE-IN AL HACER SCROLL ---------- */
.fade-in-init {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
  .hero-inner, .split, .contact-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .skills-grid, .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .exp-card { grid-template-columns: 1fr; gap: 8px; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; background: var(--bg); border-bottom: 1px solid var(--border);
    padding: 20px 24px; gap: 18px;
  }
  .skills-grid, .projects-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
}