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

:root {
  --ink: #111;
  --paper: #f5f2ec;
  --muted: #888;
  --accent: #c8513a;
  --border: rgba(0, 0, 0, 0.1);
  /* Space Grotesk en todo el sitio (títulos y cuerpo) */
  --serif: "Space Grotesk", sans-serif;
  --mono: "Space Grotesk", sans-serif;
}

html {
  font-size: 17px;
}
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--mono);
  font-weight: 400;
  line-height: 1.6;
  min-height: 100vh;
}

/* --- NAV --- */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--paper);
  z-index: 10;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: var(--ink);
  cursor: pointer;
}
.logo {
  font-family: var(--serif);
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
/* Mismo estilo que el .hero-label (acento + línea decorativa) */
.nav-role {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
.nav-role::before {
  content: "";
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--accent);
}
.nav-links {
  display: flex;
  gap: 1.5rem;
}
.nav-links a {
  font-size: 0.75rem;
  text-decoration: none;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover {
  color: var(--ink);
}

/* --- LANGUAGE SWITCH (atomic component) --- */
.lang-switch {
  position: relative;
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  flex-shrink: 0;
}
.lang-switch .lang-slider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 50%;
  background: var(--ink);
  border-radius: 999px;
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 0;
}
.lang-switch[data-active="en"] .lang-slider {
  transform: translateX(100%);
}
.lang-opt {
  position: relative;
  z-index: 1;
  min-width: 2.6em;
  padding: 0.32rem 0.55rem;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.2s;
}
.lang-opt:hover {
  color: var(--ink);
}
.lang-opt[aria-pressed="true"] {
  color: var(--paper);
}

/* --- SECTIONS --- */
section {
  padding: 4rem 2.5rem;
  border-bottom: 1px solid var(--border);
}

/* --- HERO --- */
.hero {
  padding: 5rem 2.5rem 4rem;
}
.hero-label {
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.hero-label::before {
  content: "";
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--accent);
}
h1 {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 6.5vw, 4.25rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: 1.75rem;
  /* Solo parte en los <br>: "Construyo productos" queda en una línea */
  white-space: nowrap;
}
h1 em {
  font-style: italic;
  color: var(--muted);
}
.hero-desc {
  font-size: 0.95rem;
  color: var(--muted);
  max-width: 420px;
  line-height: 1.75;
  margin-bottom: 2.5rem;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1.4rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
  transition:
    background 0.2s,
    transform 0.15s;
}
.hero-cta:hover {
  background: var(--accent);
  transform: translateY(-1px);
}
.hero-cta-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--border);
  margin-left: 0.75rem;
}
.hero-cta-ghost:hover {
  background: var(--ink);
  color: var(--paper);
}

/* --- HERO SOCIAL ICONS (Simple Icons via CDN) --- */
/* Right-side vertical stack. The SVG comes from cdn.simpleicons.org
   used as a CSS mask, so the color is driven by background-color and
   can animate on hover. */
.hero {
  position: relative;
}
.hero-social {
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  width: 36%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  perspective: 700px; /* depth for the 3D zoom */
}
.hero-social-link {
  width: 48px;
  height: 48px;
  background-color: var(--muted);
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  transform-style: preserve-3d;
  transition:
    background-color 0.3s ease,
    transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.hero-social-link:hover {
  background-color: var(--accent);
  transform: scale(1.4) translateZ(40px) rotateX(12deg) rotateY(-12deg);
}
.hero-social-link[data-icon="github"] {
  -webkit-mask-image: url("https://cdn.jsdelivr.net/npm/simple-icons@13/icons/github.svg");
  mask-image: url("https://cdn.jsdelivr.net/npm/simple-icons@13/icons/github.svg");
}
.hero-social-link[data-icon="linkedin"] {
  -webkit-mask-image: url("https://cdn.jsdelivr.net/npm/simple-icons@13/icons/linkedin.svg");
  mask-image: url("https://cdn.jsdelivr.net/npm/simple-icons@13/icons/linkedin.svg");
}
.hero-social-link[data-icon="gmail"] {
  -webkit-mask-image: url("https://cdn.jsdelivr.net/npm/simple-icons@13/icons/gmail.svg");
  mask-image: url("https://cdn.jsdelivr.net/npm/simple-icons@13/icons/gmail.svg");
}

/* --- STACK --- */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 1px;
  border: 1px solid var(--border);
  background: var(--border);
  margin-top: 2rem;
}
.stack-item {
  background: var(--paper);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  transition:
    background 0.25s ease,
    transform 0.25s ease;
}
.stack-item:hover {
  background: var(--accent);
  transform: translateY(-3px);
}
.stack-item .tech {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink);
  transition: color 0.25s ease;
}
.stack-item:hover .tech,
.stack-item:hover .level {
  color: var(--paper);
}
.stack-item .level {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.25s ease;
}
.dot-row {
  display: flex;
  gap: 3px;
  margin-top: 0.25rem;
}
.dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--border);
  transition: background 0.25s ease;
}
.dot.on {
  background: var(--accent);
}
.stack-item:hover .dot {
  background: rgba(245, 242, 236, 0.35);
}
.stack-item:hover .dot.on {
  background: var(--paper);
}

/* --- PROJECTS --- */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 2rem;
}
h2 {
  font-family: var(--serif);
  font-size: 1.8rem;
  letter-spacing: -0.01em;
}
.section-count {
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
}
.projects {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.project {
  background: var(--paper);
  padding: 1.5rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  transition: background 0.2s;
  cursor: default;
}
.project:hover {
  background: #eee9df;
}
.project-num {
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
  font-weight: 500;
}
.project-name {
  font-family: var(--serif);
  font-size: 1.15rem;
  margin-bottom: 0.35rem;
}
.project-desc {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.65;
  max-width: 480px;
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}
.tag {
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--border);
  color: var(--muted);
}
.project-link {
  font-size: 0.76rem;
  text-decoration: none;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  align-self: flex-start;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border);
  transition: all 0.15s;
  white-space: nowrap;
}
.project-link:hover {
  border-color: var(--ink);
  color: var(--ink);
}

/* --- ABOUT --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.about-text p {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 1rem;
}
.about-text p strong {
  color: var(--ink);
  font-weight: 500;
}
.timeline {
  list-style: none;
}
.timeline li {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 1rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}
.timeline li:last-child {
  border-bottom: none;
}
.tl-year {
  color: var(--muted);
  font-size: 0.78rem;
  padding-top: 0.05rem;
}
.tl-place {
  font-weight: 500;
  margin-bottom: 0.15rem;
}
.tl-role {
  color: var(--muted);
  font-size: 0.84rem;
}

/* About sub-sections: Experience / Education / Certifications */
.about-subtitle {
  font-family: var(--serif);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.about-extra {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
  align-items: start;
}
.mini-list {
  list-style: none;
}
.mini-list li {
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border);
}
.mini-list li:last-child {
  border-bottom: none;
}
.mini-title {
  font-weight: 500;
  font-size: 0.9rem;
  margin-bottom: 0.15rem;
}
.mini-sub {
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.5;
}
.mini-date {
  color: var(--muted);
  font-size: 0.78rem;
  margin-top: 0.2rem;
}

/* --- CONTACT --- */
.contact-inner {
  max-width: 540px;
}
.contact-inner h2 {
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
}
.contact-inner p {
  font-size: 0.94rem;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 2rem;
}
.contact-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.contact-link {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  transition:
    border-color 0.2s,
    color 0.2s;
}
.contact-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* --- FOOTER --- */
footer {
  padding: 1.5rem 2.5rem;
  display: flex;
  justify-content: space-between;
  font-size: 0.76rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* --- ANIMATIONS --- */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.hero-label {
  animation: fade-up 0.5s ease both;
}
h1 {
  animation: fade-up 0.55s 0.1s ease both;
}
.hero-desc {
  animation: fade-up 0.55s 0.2s ease both;
}
.hero-btns {
  animation: fade-up 0.55s 0.3s ease both;
}

/* --- RESPONSIVE --- */
@media (max-width: 640px) {
  /* Nav como barra de controles inferior (estilo app móvil) */
  nav {
    position: fixed;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 0.4rem 0.5rem;
    padding-bottom: calc(0.4rem + env(safe-area-inset-bottom));
    border-bottom: none;
    border-top: 1px solid var(--border);
    background: rgba(245, 242, 236, 0.92);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    box-shadow: 0 -2px 14px rgba(0, 0, 0, 0.05);
    z-index: 50;
  }
  .nav-brand {
    display: none;
  }
  .nav-links {
    width: 100%;
    align-items: center;
    gap: 0.15rem;
  }
  .nav-links a {
    flex: 1;
    text-align: center;
    padding: 0.6rem 0.15rem;
    font-size: 0.6rem;
    letter-spacing: 0.04em;
  }
  .lang-switch {
    flex-shrink: 0;
    margin-left: 0.25rem;
  }
  /* Espacio para que el contenido no quede tapado por la barra */
  body {
    padding-bottom: 4.25rem;
  }
  section,
  .hero {
    padding: 3rem 1.25rem;
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .about-extra {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .hero-social {
    position: static;
    width: auto;
    flex-direction: row;
    justify-content: flex-start;
    gap: 2rem;
    margin-top: 2rem;
  }
  .hero-social-link {
    width: 40px;
    height: 40px;
  }
  footer {
    padding: 1rem 1.25rem;
  }
}