/* ==========================================================================
   tonatiuhliera.com — hoja de estilos
   Minimalismo: fondo negro, texto blanco, sin librerías ni webfonts.
   ========================================================================== */

:root {
  --bg: #000000;
  --surface: #0b0b0b;
  --surface-2: #111111;
  --text: #ffffff;
  --muted: #a3a3a3;
  --line: #232323;
  --line-strong: #3a3a3a;
  --azul: #002b5c;   /* azul UNAM, solo como acento */
  --oro: #c8a45c;    /* oro UNAM, solo como acento */
  --radius: 12px;
  --wrap: 1040px;
  --gap: 1.25rem;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: clamp(1rem, 0.95rem + 0.2vw, 1.0625rem);
  line-height: 1.65;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(1.1rem, 4vw, 2rem);
}

/* ---------- Tipografía ---------- */

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; font-weight: 650; margin: 0; }

h1 { font-size: clamp(2.4rem, 1.6rem + 4vw, 4.25rem); }
h2 { font-size: clamp(1.5rem, 1.2rem + 1.4vw, 2.125rem); margin-bottom: 0.35rem; }
h3 { font-size: clamp(1.125rem, 1.05rem + 0.5vw, 1.4rem); }

p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }

a { color: var(--text); text-decoration-color: var(--line-strong); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--oro); }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.875em;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.1em 0.4em;
}

strong { font-weight: 650; }

.muted { color: var(--muted); }
.small { font-size: 0.9375rem; }
.lead { font-size: clamp(1.0625rem, 1rem + 0.5vw, 1.25rem); max-width: 62ch; color: #ededed; }

.eyebrow {
  margin: 0 0 1rem;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--oro);
}

/* ---------- Layout ---------- */

.section { padding-block: clamp(4rem, 3rem + 6vw, 8rem); scroll-margin-top: 5rem; }

/* La portada respira un poco más que el resto de secciones */
.hero { padding-block: clamp(4.5rem, 3rem + 8vw, 9rem); }
.section + .section { border-top: 1px solid var(--line); }
.section-sub { margin-top: 0.5rem; margin-bottom: 2.5rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(0, 0, 0, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.brand-name { font-size: 0.9375rem; letter-spacing: -0.01em; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

.nav { display: flex; gap: clamp(1rem, 2.5vw, 2rem); }
.nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9375rem;
}
.nav a:hover { color: var(--text); }

/* ---------- Botones ---------- */

.btn-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 550;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary { background: var(--text); color: #000; border-color: var(--text); }
.btn-primary:hover { background: #e2e2e2; border-color: #e2e2e2; }
.btn-outline:hover { border-color: var(--text); background: var(--surface-2); }
.btn-ghost { color: var(--muted); border-color: var(--line); }
.btn-ghost:hover { color: var(--text); border-color: var(--line-strong); background: var(--surface-2); }

.btn:active { transform: translateY(1px); }

.icon { width: 1.05em; height: 1.05em; flex: none; }

/* ---------- Tarjetas ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.25rem, 3vw, 1.75rem);
}

.grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: 1fr;
}

@media (min-width: 880px) {
  .grid { grid-template-columns: repeat(3, 1fr); }
}

.project { display: flex; flex-direction: column; gap: 0.85rem; }
.project h3 { word-break: break-word; }
.project p { font-size: 0.9375rem; }
.project .project-actions { margin-top: auto; }

.project-head { display: flex; flex-direction: column; gap: 0.6rem; }

.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0; }

.tag {
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
}

.project-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--line);
}

.link-arrow {
  text-decoration: none;
  font-weight: 550;
  font-size: 0.9375rem;
}
.link-arrow:hover { color: var(--oro); }

.copy {
  font: inherit;
  font-size: 0.8125rem;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.copy:hover { color: var(--text); border-color: var(--line-strong); }
.copy[data-done="1"] { color: var(--oro); border-color: var(--oro); }

/* ---------- Tarjeta de estudiante ---------- */

.student-card {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  grid-template-columns: 1fr;
  margin-top: 2rem;
}

@media (min-width: 720px) {
  .student-card { grid-template-columns: 190px 1fr; align-items: start; }
}

.student-logo { display: grid; place-items: center; }

.logo-img {
  width: min(150px, 45vw);
  height: auto;
  display: block;
  filter: drop-shadow(0 0 0.5rem rgba(200, 164, 92, 0.12));
}

.logo-fallback,
.logo-fallback-svg { width: min(150px, 45vw); height: auto; display: block; }

.student-body h3 { margin-bottom: 0.35rem; }
.student-place { color: var(--oro); font-size: 0.9375rem; margin-bottom: 1rem; }

.facts { list-style: none; margin: 1.25rem 0; padding: 0; border-top: 1px solid var(--line); }
.facts li {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: space-between;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.9375rem;
}
.fact-key { color: var(--muted); }
.fact-val { text-align: right; }

/* ---------- Pokedex ---------- */

.badge {
  display: inline-block;
  margin-right: 0.5rem;
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  color: var(--muted);
  vertical-align: middle;
}

/* ---------- Footer y notas ---------- */

.site-footer { border-top: 1px solid var(--line); padding-block: 2rem; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; justify-content: space-between; }
.footer-inner p { margin: 0; }
.footer-inner a { text-decoration: none; color: var(--muted); }
.footer-inner a:hover { color: var(--text); }

.note { margin-top: 0.85rem; color: var(--oro); font-size: 0.875rem; }

/* ---------- Menú móvil ---------- */

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  width: 2.5rem;
  height: 2.25rem;
  cursor: pointer;
  padding: 0;
  place-items: center;
}

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block;
  width: 1.05rem;
  height: 1.5px;
  background: var(--text);
}

.nav-toggle-bars { position: relative; }
.nav-toggle-bars::before, .nav-toggle-bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }

@media (max-width: 640px) {
  .nav-toggle { display: grid; }
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: #000;
    border-bottom: 1px solid var(--line);
    padding: 0.5rem clamp(1.1rem, 4vw, 2rem) 1rem;
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 0.7rem 0; border-bottom: 1px solid var(--line); }
  .nav a:last-child { border-bottom: 0; }
}

/* ---------- Accesibilidad ---------- */

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 50;
  background: var(--text);
  color: #000;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  text-decoration: none;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 1rem; }

:focus-visible {
  outline: 2px solid var(--oro);
  outline-offset: 2px;
  border-radius: 4px;
}

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

/* ---------- Impresión ---------- */

@media print {
  :root { --bg: #fff; --text: #000; --muted: #444; --line: #ccc; }
  body { background: #fff; color: #000; }
  .site-header, .btn-row, .copy, .skip-link { display: none; }
  .card { break-inside: avoid; }
}