/* ===== Tokens (tema claro, colores sólidos) ===== */
:root {
  --bg: #f6f8fc;
  --bg-alt: #eef2fb;
  --surface: #ffffff;
  --surface-2: #f1f5fc;
  --border: #e3e9f4;
  --border-strong: #d4ddec;
  --text: #14233b;
  --text-dim: #4d5d78;
  --text-faint: #8493ab;
  --accent: #6366f1;          /* índigo */
  --accent-dark: #4f46e5;
  --accent-soft: rgba(99, 102, 241, 0.12);
  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1140px;
  --shadow-sm: 0 4px 14px -6px rgba(20, 35, 59, 0.14);
  --shadow: 0 22px 50px -28px rgba(40, 60, 120, 0.42);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  line-height: 1.65;
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.15; margin: 0; letter-spacing: -0.025em; }

.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 1.5rem; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: #fff;
  padding: 0.6rem 1rem; border-radius: 0 0 var(--radius-sm) 0; z-index: 100; font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ===== Nav ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.72);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s, background 0.3s;
}
.nav.is-scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow-sm); background: rgba(255, 255, 255, 0.85); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.nav__brand { font-family: var(--mono); font-weight: 700; font-size: 1.05rem; letter-spacing: -0.03em; }
.nav__brand-mark { color: var(--accent); }
.nav__brand-accent { color: var(--text-faint); }
.nav__links { display: flex; align-items: center; gap: 0.3rem; }
.nav__links a {
  padding: 0.5rem 0.85rem; border-radius: 9px; color: var(--text-dim);
  font-size: 0.94rem; font-weight: 500; transition: color 0.2s, background 0.2s;
}
.nav__links a:hover { color: var(--text); background: var(--surface-2); }
.nav__cta {
  color: #fff !important; background: var(--accent);
  box-shadow: 0 10px 22px -12px rgba(99, 102, 241, 0.5);
}
.nav__cta:hover { background: var(--accent-dark); }

.nav__toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 44px; height: 44px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 11px; cursor: pointer;
}
.nav__toggle span { display: block; width: 18px; height: 2px; margin-inline: auto; background: var(--text); transition: transform 0.25s, opacity 0.2s; }
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 1.5rem; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 0.95rem; border: 1px solid transparent;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
}
.btn--primary { background: var(--accent); color: #fff; box-shadow: 0 14px 30px -12px rgba(99, 102, 241, 0.45); }
.btn--primary:hover { transform: translateY(-2px); background: var(--accent-dark); box-shadow: 0 20px 38px -12px rgba(99, 102, 241, 0.5); }
.btn--ghost { border-color: var(--border-strong); color: var(--text); background: var(--surface); }
.btn--ghost:hover { transform: translateY(-2px); border-color: var(--accent); color: var(--accent); }

/* ===== Hero ===== */
.hero { position: relative; padding: clamp(3rem, 9vh, 6rem) 0 clamp(3rem, 8vh, 5rem); overflow: hidden; }
.hero__inner {
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 4rem); align-items: center;
}
.hero__content { position: relative; z-index: 2; }
.hero__eyebrow {
  font-family: var(--mono); font-size: 0.9rem; margin: 0 0 1rem; font-weight: 600;
  color: var(--accent);
}
.hero__title {
  font-size: clamp(2.6rem, 6.4vw, 4.4rem); font-weight: 800; letter-spacing: -0.04em;
  color: var(--text);
}
.hero__role { font-size: clamp(1.1rem, 2.4vw, 1.45rem); font-weight: 600; margin: 0.8rem 0 0; color: var(--text); }
.hero__sep { color: var(--text-faint); margin-inline: 0.4rem; }
.hero__accent { color: var(--accent); }
.hero__lead { margin: 1.3rem 0 0; font-size: 1.06rem; color: var(--text-dim); max-width: 560px; }
.hero__lead strong { color: var(--text); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.9rem; margin: 2rem 0 0; }
.hero__meta {
  list-style: none; margin: 2.2rem 0 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 0.7rem 1.4rem; color: var(--text-dim); font-size: 0.92rem;
}
.hero__meta li { display: flex; align-items: center; gap: 0.45rem; }
.hero__meta abbr { text-decoration: none; }

.hero__visual { position: relative; }
.hero__visual picture { position: relative; z-index: 1; display: block; }
.hero__visual img {
  width: 100%; height: auto; border-radius: var(--radius);
  animation: floaty 7s ease-in-out infinite;
}
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ===== Sections ===== */
.section { padding: clamp(3.5rem, 9vh, 6rem) 0; position: relative; }
.section--alt { background: var(--bg-alt); border-block: 1px solid var(--border); }
.section__head { display: flex; align-items: baseline; gap: 0.8rem; margin-bottom: 2.6rem; }
.section__head--center { justify-content: center; text-align: center; }
.section__index {
  font-family: var(--mono); font-size: 0.95rem; font-weight: 700;
  color: var(--accent);
}
.section__title { font-size: clamp(1.7rem, 4vw, 2.4rem); font-weight: 800; }

/* ===== About ===== */
.about { display: grid; grid-template-columns: 1.6fr 1fr; gap: 2.5rem; align-items: start; }
.about__text p { margin: 0 0 1.1rem; color: var(--text-dim); }
.about__text strong { color: var(--text); }
.about__card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.7rem; box-shadow: var(--shadow); position: sticky; top: 88px;
}
.about__card h3 {
  font-size: 1rem; font-family: var(--mono); margin-bottom: 1rem;
  color: var(--accent);
}
.about__facts { margin: 0; display: grid; gap: 0.9rem; }
.about__facts div { display: flex; flex-direction: column; gap: 0.1rem; padding-bottom: 0.85rem; border-bottom: 1px solid var(--border); }
.about__facts div:last-child { border-bottom: 0; padding-bottom: 0; }
.about__facts dt { font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-faint); }
.about__facts dd { margin: 0; font-weight: 600; }

/* ===== Skills ===== */
.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.2rem; }
.skill-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.7rem; transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
  position: relative; overflow: hidden;
}
.skill-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; background: var(--accent);
  opacity: 0; transition: opacity 0.25s;
}
.skill-card:hover { transform: translateY(-6px); border-color: var(--accent); box-shadow: var(--shadow); }
.skill-card:hover::before { opacity: 1; }
.skill-card__icon {
  font-size: 1.7rem; width: 54px; height: 54px; display: grid; place-items: center;
  background: var(--accent-soft); border-radius: 14px; margin-bottom: 1rem;
}
.skill-card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.skill-card p { color: var(--text-dim); font-size: 0.95rem; margin: 0 0 1rem; }

.tags { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tags li {
  font-family: var(--mono); font-size: 0.74rem; color: var(--text-dim);
  background: var(--surface-2); border: 1px solid var(--border); padding: 0.25rem 0.6rem; border-radius: 999px;
}

/* ===== Timeline ===== */
.timeline { list-style: none; margin: 0; padding: 0; position: relative; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--accent); opacity: 0.35; }
.timeline__item { position: relative; padding-left: 2.4rem; padding-bottom: 2.2rem; }
.timeline__item:last-child { padding-bottom: 0; }
.timeline__dot { position: absolute; left: 0; top: 6px; width: 16px; height: 16px; border-radius: 50%; background: var(--surface); border: 3px solid var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.timeline__period { font-family: var(--mono); font-size: 0.82rem; color: var(--accent); font-weight: 600; }
.timeline__content h3 { font-size: 1.2rem; margin: 0.3rem 0 0.1rem; }
.timeline__org { color: var(--text); font-weight: 600; margin: 0 0 0.5rem; font-size: 0.95rem; }
.timeline__content p:last-child { color: var(--text-dim); margin: 0; font-size: 0.96rem; }

/* ===== Projects ===== */
.projects { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.2rem; }
.project {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.7rem; transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.project:hover { transform: translateY(-6px); border-color: var(--accent); box-shadow: var(--shadow); }
.project__top { margin-bottom: 0.9rem; }
.project__tag {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.04em; font-weight: 600;
  color: var(--accent); background: var(--accent-soft);
  border: 1px solid rgba(99, 102, 241, 0.2); padding: 0.25rem 0.6rem; border-radius: 999px;
}
.project h3 { font-size: 1.18rem; margin-bottom: 0.5rem; }
.project p { color: var(--text-dim); font-size: 0.95rem; margin: 0 0 1rem; }

/* ===== Contact ===== */
.contact__inner { max-width: 640px; text-align: center; }
.contact__lead { font-size: 1.15rem; color: var(--text-dim); margin: 0 auto 2rem; max-width: 480px; }
.contact__links { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }
.contact__btn {
  display: inline-flex; align-items: center; gap: 0.6rem; padding: 0.85rem 1.5rem;
  border-radius: var(--radius-sm); background: var(--surface); border: 1px solid var(--border);
  font-weight: 600; transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.contact__btn span { font-family: var(--mono); color: var(--accent); font-weight: 700; }
.contact__btn:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--shadow-sm); }

/* ===== Language switch ===== */
.lang-switch { display: inline-flex; gap: 2px; margin-left: 0.6rem; padding: 3px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; }
.lang-switch__btn {
  border: 0; background: transparent; color: var(--text-dim); font-family: var(--mono);
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.03em; padding: 0.3rem 0.55rem;
  border-radius: 7px; cursor: pointer; transition: color 0.2s, background 0.2s;
}
.lang-switch__btn:hover { color: var(--text); }
.lang-switch__btn.is-active { background: var(--accent); color: #fff; }

/* ===== Contact form ===== */
.contact-form {
  text-align: left; margin: 0 auto 2rem; max-width: 560px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.9rem; box-shadow: var(--shadow);
}
.contact-form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.field { display: flex; flex-direction: column; margin-bottom: 1rem; }
.field label { font-size: 0.85rem; font-weight: 600; color: var(--text-dim); margin-bottom: 0.4rem; }
.field input, .field textarea {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  padding: 0.7rem 0.85rem; width: 100%; resize: vertical;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-faint); }
.field input:focus, .field textarea:focus { outline: none; background: var(--surface); border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.contact-form__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }
.contact-form__actions .btn { cursor: pointer; }
.contact-form__actions .btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.form-status { margin: 0; font-size: 0.9rem; font-weight: 500; }
.form-status--ok { color: var(--accent); }
.form-status--error { color: #e5484d; }
.form-status--pending { color: var(--text-dim); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* ===== Footer ===== */
.footer { border-top: 1px solid var(--border); padding: 2rem 0; color: var(--text-faint); font-size: 0.88rem; background: var(--surface); }
.footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.6rem; }
.footer p { margin: 0; }

/* ===== Reveal animation ===== */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 920px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__visual { order: -1; max-width: 460px; margin-inline: auto; }
  .hero__lead { max-width: none; }
}
@media (max-width: 860px) {
  .about { grid-template-columns: 1fr; }
  .about__card { position: static; }
}
@media (max-width: 720px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed; inset: 68px 0 auto 0; flex-direction: column; align-items: stretch;
    gap: 0.2rem; padding: 1rem 1.5rem 1.5rem; background: rgba(255,255,255,0.96);
    backdrop-filter: blur(14px); border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow); transform: translateY(-130%); transition: transform 0.3s ease;
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__links a { padding: 0.85rem 1rem; font-size: 1rem; }
  .nav__cta { text-align: center; justify-content: center; }
  .lang-switch { margin: 0.6rem 0 0; align-self: flex-start; }
}
@media (max-width: 560px) {
  .contact-form__row { grid-template-columns: 1fr; gap: 0; }
}