/* ---------- Reset & base ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --ink: #0a0a0a;
  --paper: #ffffff;
  --muted: #6b6b6b;
  --hairline: #e4e4e4;
  --surface: #f5f5f5;
  --max-width: 1100px;
  --transition: 0.25s ease;
}

[data-theme="dark"] {
  --ink: #f2f2f2;
  --paper: #0a0a0a;
  --muted: #a3a3a3;
  --hairline: #2a2a2a;
  --surface: #161616;
}

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--ink) var(--surface);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--surface);
}

::-webkit-scrollbar-thumb {
  background-color: var(--ink);
  border-radius: 6px;
  border: 2px solid var(--surface);
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--muted);
}

body {
  font-family: "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition:
    background var(--transition),
    color var(--transition);
}

::selection {
  background: var(--ink);
  color: var(--paper);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

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

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  background: var(--paper);
  border-bottom: 1px solid var(--ink);
  z-index: 100;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  padding-bottom: 20px;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 0.95rem;
  position: relative;
  padding-bottom: 4px;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--ink);
  transition: width var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--ink);
  background: none;
  color: var(--ink);
  cursor: pointer;
  transition:
    background var(--transition),
    color var(--transition);
}

.theme-toggle:hover {
  background: var(--ink);
  color: var(--paper);
}

.theme-toggle svg {
  display: none;
  width: 18px;
  height: 18px;
}

[data-theme="light"] .theme-toggle .icon-moon {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

/* ---------- Selector de idioma ---------- */
.lang-switcher {
  position: relative;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--ink);
  background: none;
  color: var(--ink);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition:
    background var(--transition),
    color var(--transition);
}

.lang-toggle:hover {
  background: var(--ink);
  color: var(--paper);
}

.lang-toggle svg {
  width: 16px;
  height: 16px;
}

.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 130px;
  background: var(--paper);
  border: 1px solid var(--ink);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition:
    opacity var(--transition),
    transform var(--transition),
    visibility var(--transition);
}

.lang-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-menu li + li {
  border-top: 1px solid var(--hairline);
}

.lang-option {
  display: block;
  width: 100%;
  padding: 10px 14px;
  background: none;
  border: none;
  color: var(--ink);
  font-family: inherit;
  font-size: 0.9rem;
  text-align: left;
  cursor: pointer;
  transition:
    background var(--transition),
    color var(--transition);
}

.lang-option:hover {
  background: var(--surface);
}

.lang-option.active {
  font-weight: 700;
  background: var(--ink);
  color: var(--paper);
}

/* ---------- Hero ---------- */
.hero {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 60px;
  padding-bottom: 60px;
}

.eyebrow {
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.subtitle {
  font-size: clamp(1.25rem, 4vw, 2rem);
  color: var(--muted);
  font-weight: 500;
  margin-top: 8px;
  margin-bottom: 24px;
}

.hero-text {
  max-width: 540px;
  color: var(--muted);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 14px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid var(--ink);
  transition:
    background var(--transition),
    color var(--transition);
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}

.btn-primary:hover {
  background: var(--paper);
  color: var(--ink);
}

.btn-outline {
  background: transparent;
  color: var(--ink);
}

.btn-outline:hover {
  background: var(--ink);
  color: var(--paper);
}

/* ---------- Sections ---------- */
.section {
  padding: 100px 24px;
  border-top: 1px solid var(--hairline);
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 48px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.section-title > span:first-child {
  color: var(--muted);
  font-weight: 400;
  font-size: 1.1rem;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: start;
}

.about-text p {
  color: var(--muted);
  margin-bottom: 16px;
  max-width: 620px;
}

/* ---------- Inline links ---------- */
.inline-link {
  border-bottom: 1px solid var(--muted);
  transition: border-color var(--transition);
}

.inline-link:hover {
  border-color: var(--ink);
}

/* ---------- Timeline (Experience) ---------- */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 680px;
}

.timeline-item {
  border-left: 2px solid var(--ink);
  padding-left: 24px;
}

.timeline-date {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 4px;
  letter-spacing: 0.03em;
}

.tenure::before {
  content: "·";
  margin: 0 6px;
}

.tenure:empty {
  display: none;
}

.timeline-item h3 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.timeline-item p:not(.timeline-date) {
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- Projects ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.project-card {
  border: 1px solid var(--ink);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    border-color var(--transition);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 6px 6px 0 var(--ink);
}

.project-thumb {
  aspect-ratio: 16 / 10;
  background: var(--surface);
  border: 1px solid var(--hairline);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  overflow: hidden;
}

.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.project-card p {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 16px;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.project-tags span {
  font-size: 0.75rem;
  border: 1px solid var(--hairline);
  padding: 4px 10px;
  color: var(--muted);
}

.project-links {
  display: flex;
  gap: 20px;
}

.project-links a {
  font-size: 0.9rem;
  font-weight: 600;
  border-bottom: 1px solid var(--muted);
  transition: border-color var(--transition), opacity var(--transition);
}

.project-links a:hover {
  border-color: var(--ink);
  opacity: 0.7;
}

/* ---------- Skills ---------- */
.skills-groups {
  display: grid;
  gap: 40px;
}

.skill-group-title {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.skills-list li {
  border: 1px solid var(--ink);
  padding: 12px 20px;
  font-size: 0.95rem;
  font-weight: 500;
}

/* ---------- Contact ---------- */
.contact-section {
  text-align: center;
}

.contact-text {
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto 32px;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-top: 40px;
}

.social-links a {
  font-size: 0.9rem;
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.social-links a:hover {
  border-color: var(--ink);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--ink);
  padding: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .nav-toggle {
    display: flex;
  }

  .nav-right {
    gap: 14px;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--ink);
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }

  .nav-links.open {
    max-height: 300px;
  }

  .nav-links li {
    border-top: 1px solid var(--hairline);
  }

  .nav-links a {
    display: block;
    padding: 16px 24px;
  }

  .section {
    padding: 64px 24px;
  }
}