:root {
  --color-primary:  #872900;
  --color-primary-light: #a33200;
  --color-bg:       #f9f9f9;
  --color-surface:  #ffffff;
  --color-border:   #e0e0e0;
  --color-text:     #1a1a1a;
  --color-muted:    #5a5a5a;
  --color-footer-bg: #3b3b3b;
  --color-footer:   #898989;
  --font-header:    'Oswald', sans-serif;
  --font-body:      'Open Sans', sans-serif;
}

* { box-sizing: border-box; }

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
}

h1, h2, h3, .section-label { font-family: var(--font-header); }

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-light); text-decoration: underline; }

/* ── Hero / Header ────────────────────────────────── */
.hero {
  background: var(--color-primary);
  padding: 4rem 0 3.5rem;
  text-align: center;
  color: #fff;
}

.hero .badge-years {
  display: inline-block;
  background: rgba(255,255,255,.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,.4);
  border-radius: 2rem;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .1em;
  padding: .25rem .9rem;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  font-family: var(--font-header);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: .02em;
  text-transform: uppercase;
  margin-bottom: .4rem;
  color: #fff;
}

.hero .domain {
  color: rgba(255,255,255,.7);
  font-size: .9rem;
  margin-bottom: 1.5rem;
  letter-spacing: .05em;
}

.hero .lead {
  max-width: 600px;
  margin: 0 auto;
  color: rgba(255,255,255,.85);
  font-size: 1rem;
}

/* ── Social links in header ───────────────────────── */
.hero-social {
  margin-top: 2rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.hero-social a {
  color: rgba(255,255,255,.8);
  font-size: .85rem;
  font-family: var(--font-header);
  letter-spacing: .05em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: .4rem;
  text-decoration: none;
  transition: color .15s;
}

.hero-social a:hover { color: #fff; text-decoration: none; }

.hero-social svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  flex-shrink: 0;
}

/* ── Sections ─────────────────────────────────────── */
section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--color-border);
}

section:last-of-type { border-bottom: none; }

.section-label {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: .75rem;
}

h2 {
  font-size: 1.7rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 1rem;
  color: var(--color-text);
}

p { color: var(--color-muted); margin-bottom: 1rem; }

/* ── Stats grid ───────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-primary);
  border-radius: .25rem;
  padding: 1.5rem 1rem;
  text-align: center;
}

.stat-card .number {
  font-size: 2.6rem;
  font-weight: 700;
  font-family: var(--font-header);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: .35rem;
}

.stat-card .label {
  font-size: .75rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-family: var(--font-header);
}

/* ── Timeline ─────────────────────────────────────── */
.timeline {
  position: relative;
  margin-top: 2rem;
  padding-left: 1.5rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: .5rem;
  bottom: .5rem;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 2rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -1.55rem;
  top: .55rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-bg);
}

.timeline-item .year {
  font-size: .75rem;
  font-weight: 700;
  font-family: var(--font-header);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: .1em;
}

.timeline-item .event {
  font-weight: 600;
  font-family: var(--font-header);
  color: var(--color-text);
  margin: .15rem 0 .25rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: .03em;
}

.timeline-item p {
  font-size: .9rem;
  margin: 0;
}

/* ── Tech tags ───────────────────────────────────── */
.tech-grid {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 1.25rem;
}

.tech-tag {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: .25rem;
  padding: .25rem .75rem;
  font-size: .82rem;
  color: var(--color-muted);
  font-family: var(--font-header);
  letter-spacing: .03em;
}

.tech-tag.primary {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: #fff5f2;
}

/* ── Stack cards ─────────────────────────────────── */
.stack-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: .25rem;
  padding: 1.25rem;
}

/* ── Closing card ────────────────────────────────── */
.closing-card {
  background: var(--color-primary);
  border-radius: .25rem;
  padding: 2.5rem;
  text-align: center;
  margin-top: 2rem;
  color: #fff;
}

.closing-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  font-family: var(--font-header);
  text-transform: uppercase;
  margin-bottom: .75rem;
  color: #fff;
}

.closing-card p {
  max-width: 540px;
  margin: 0 auto;
  font-size: .95rem;
  color: rgba(255,255,255,.85);
}

/* ── Footer ──────────────────────────────────────── */
footer {
  background: var(--color-footer-bg);
  padding: 2rem 0;
  text-align: center;
  color: var(--color-footer);
  font-size: .85rem;
}

footer a {
  color: var(--color-footer);
  margin: 0 .75rem;
}

footer a:hover { color: #fff; }

/* ── Author links (sección "El autor") ──────────── */
.author-links {
  display: inline-flex;
  flex-direction: column;
  gap: .6rem;
  align-items: flex-start;
}

.author-link {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-header);
  font-size: .85rem;
  letter-spacing: .05em;
  text-transform: uppercase;
}