/* ============================================================
   TOP10YA — sistema de diseño v3
   Modo claro por defecto · toggle dark mode
   Paleta clara: blanco #FFFFFF · gris suave #F5F5F3 · borde #E2E2DE
                 rojo #E8001A · texto #111110 · suave #6B6B69
   Paleta oscura: carbón #0D0F0E · superficie #161A18 · texto #E8EDE8
   Tipos: Syne (display/headings) + Inter (texto)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@700;800&family=Inter:wght@400;500;600;700&display=swap');

/* ---- Modo CLARO (defecto) ---- */
:root {
  --bg:             #FFFFFF;
  --bg-alt:         #F5F5F3;
  --surface:        #F5F5F3;
  --surface2:       #EBEBEA;
  --border:         #E2E2DE;
  --border-strong:  #CFCFCC;
  --red:            #E8001A;
  --red-dark:       #B8001A;
  --red-glow:       rgba(232,0,26,.12);
  --gold:           #C48800;
  --gold-dim:       #A8752A;
  --text:           #111110;
  --soft:           #6B6B69;
  --softer:         #ABABAA;
  --hero-ghost:     rgba(0,0,0,.04);
  --card-shadow:    0 4px 16px rgba(0,0,0,.07);
  --card-shadow-hover: 0 16px 36px -12px rgba(0,0,0,.14), 0 0 0 1.5px var(--red);
  --header-bg:      rgba(255,255,255,.9);
  --radius:         16px;
  --max:            1160px;
}

/* ---- Modo OSCURO ---- */
html[data-theme="dark"] {
  --bg:             #0D0F0E;
  --bg-alt:         #111412;
  --surface:        #161A18;
  --surface2:       #1E2320;
  --border:         rgba(255,255,255,.08);
  --border-strong:  rgba(255,255,255,.14);
  --red:            #FF1A2E;
  --red-dark:       #CC0E20;
  --red-glow:       rgba(255,26,46,.14);
  --gold:           #F5C842;
  --gold-dim:       #A8892D;
  --text:           #E8EDE8;
  --soft:           #7A8A82;
  --softer:         #3D4D45;
  --hero-ghost:     rgba(255,255,255,.025);
  --card-shadow:    0 4px 16px rgba(0,0,0,.4);
  --card-shadow-hover: 0 20px 40px -16px rgba(0,0,0,.6), 0 0 0 1.5px var(--red);
  --header-bg:      rgba(13,15,14,.9);
}

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

html {
  scroll-behavior: smooth;
  background: var(--bg);
  transition: background .2s;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background .2s, color .2s;
}

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

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---- Eyebrow label ---- */
.eyebrow {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: .68rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--red);
  display: inline-block;
}

/* ---- Headings ---- */
h1, h2, h3 {
  font-family: 'Syne', sans-serif;
  margin: 0;
  letter-spacing: -.02em;
  line-height: 1.05;
}

/* ============================================================
   THEME TOGGLE BUTTON
   ============================================================ */
.theme-toggle {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--soft);
  transition: background .15s, border-color .15s, color .15s;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: var(--surface2);
  color: var(--text);
  border-color: var(--border-strong);
}

.theme-toggle svg { display: block; }

/* Icono sol: visible en dark mode */
.icon-sun  { display: none; }
.icon-moon { display: block; }

html[data-theme="dark"] .icon-sun  { display: block; }
html[data-theme="dark"] .icon-moon { display: none; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background .2s, border-color .2s;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
  gap: 16px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -.03em;
  text-decoration: none;
  color: var(--text);
  display: flex;
  align-items: baseline;
}

.logo .dot { color: var(--red); }

.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  font-size: .88rem;
  font-weight: 600;
  color: var(--soft);
  padding: 7px 14px;
  border-radius: 999px;
  transition: background .15s, color .15s;
}

.nav-links a:hover {
  background: var(--surface2);
  color: var(--text);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding: 80px 0 72px;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 60% -10%, var(--red-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero .wrap { position: relative; z-index: 2; }

.hero .eyebrow { margin-bottom: 20px; }

.hero h1 {
  font-size: clamp(3rem, 6.5vw, 5.2rem);
  font-weight: 800;
  max-width: 14ch;
  color: var(--text);
}

.hero h1 em {
  font-style: normal;
  color: var(--red);
}

.hero p {
  max-width: 48ch;
  font-size: 1.1rem;
  color: var(--soft);
  margin-top: 20px;
  line-height: 1.65;
}

.rank-ghost {
  position: absolute;
  right: -20px;
  top: -80px;
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: min(45vw, 440px);
  color: var(--hero-ghost);
  line-height: 1;
  z-index: 1;
  pointer-events: none;
  user-select: none;
}

/* ============================================================
   FILTER BAR
   ============================================================ */
.filter-btn {
  font-family: 'Inter', sans-serif;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 7px 16px;
  border: 1.5px solid var(--border-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--soft);
  cursor: pointer;
  text-decoration: none;
  transition: all .15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}

/* ============================================================
   CARD GRID
   ============================================================ */
.grid-section { padding: 10px 0 90px; }

.grid-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--soft);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 28px;
  font-family: 'Inter', sans-serif;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px 24px;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--card-shadow);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  position: relative;
  overflow: hidden;
}

.card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--red-glow) 0%, transparent 60%);
  opacity: 0;
  transition: opacity .2s;
  pointer-events: none;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--card-shadow-hover);
  border-color: var(--red);
}

.card:hover::after { opacity: 1; }

.card .count {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 2.8rem;
  color: var(--gold);
  line-height: 1;
  letter-spacing: -.04em;
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text);
}

.card p {
  margin: 0;
  color: var(--soft);
  font-size: .9rem;
  line-height: 1.55;
}

.card .tag {
  font-family: 'Inter', sans-serif;
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--red);
}

.card .arrow {
  margin-top: auto;
  padding-top: 8px;
  font-weight: 700;
  font-size: .88rem;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--soft);
  transition: color .15s;
}

.card:hover .arrow { color: var(--red); }
.card .arrow svg { transition: transform .2s ease; }
.card:hover .arrow svg { transform: translateX(5px); }

/* ============================================================
   AD SLOT
   ============================================================ */
.ad-slot {
  max-width: var(--max);
  margin: 36px auto;
  padding: 16px;
  border: 1px dashed var(--border-strong);
  border-radius: 12px;
  text-align: center;
  font-family: 'Inter', sans-serif;
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--softer);
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about-section { padding: 20px 0 90px; }

.about-box {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 20px;
  padding: 44px 48px;
  max-width: 760px;
  box-shadow: var(--card-shadow);
}

.about-box p {
  color: var(--soft);
  font-size: 1rem;
  line-height: 1.75;
  margin: 0;
}

/* ============================================================
   ARTICLE: HERO
   ============================================================ */
.article-hero {
  padding: 56px 0 36px;
  border-bottom: 1px solid var(--border);
  position: relative;
  background: var(--bg);
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 100% 50%, var(--red-glow) 0%, transparent 70%);
  pointer-events: none;
}

.article-hero .wrap { position: relative; z-index: 2; }

.breadcrumb {
  font-size: .8rem;
  color: var(--soft);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb a {
  text-decoration: none;
  color: var(--soft);
  transition: color .15s;
}

.breadcrumb a:hover { color: var(--red); }
.breadcrumb span { color: var(--softer); }

.article-hero .eyebrow { margin-bottom: 16px; }

.article-hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  max-width: 20ch;
  color: var(--text);
}

.article-intro {
  max-width: 65ch;
  font-size: 1.05rem;
  color: var(--soft);
  margin-top: 18px;
  line-height: 1.7;
}

.article-meta {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 22px;
  font-size: .78rem;
  color: var(--softer);
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  letter-spacing: .04em;
}

/* ============================================================
   TABLE OF CONTENTS
   ============================================================ */
.toc {
  margin: 36px 0 0;
  padding: 20px 24px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  max-width: 540px;
  box-shadow: var(--card-shadow);
}

.toc summary {
  font-weight: 700;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  font-size: .75rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--soft);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc summary::before {
  content: '▶';
  font-size: .65rem;
  transition: transform .2s;
  color: var(--red);
}

details[open] .toc summary::before { transform: rotate(90deg); }

.toc ol {
  margin: 14px 0 0;
  padding-left: 20px;
  columns: 2;
  gap: 24px;
  font-size: .88rem;
  line-height: 1.8;
}

.toc a {
  text-decoration: none;
  color: var(--soft);
  transition: color .15s;
}

.toc a:hover { color: var(--red); }

/* ============================================================
   RANKING ITEMS
   ============================================================ */
.ranking { padding: 50px 0 80px; }

.item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 36px;
  padding: 50px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
  scroll-margin-top: 90px;
  align-items: start;
}

.item:first-child { padding-top: 16px; }

.item .rank {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 5rem;
  line-height: 1;
  color: var(--surface2);
  -webkit-text-stroke: 2px var(--border-strong);
  letter-spacing: -.04em;
  user-select: none;
}

/* Top 3 en rojo brillante */
.item:nth-last-child(-n+3) .rank {
  color: var(--red);
  -webkit-text-stroke: 0;
}

.item-body { display: flex; flex-direction: column; gap: 12px; }

.item-body h2 {
  font-size: clamp(1.4rem, 2.8vw, 1.9rem);
  font-weight: 800;
  color: var(--text);
}

.item-body .subtitle {
  font-family: 'Inter', sans-serif;
  font-size: .72rem;
  font-weight: 700;
  color: var(--red);
  text-transform: uppercase;
  letter-spacing: .12em;
  display: block;
}

.item-body p {
  color: var(--soft);
  max-width: 64ch;
  line-height: 1.75;
  margin: 0;
  font-size: .97rem;
}

.item-media {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  max-width: 520px;
}

.item-media img {
  aspect-ratio: 16/10;
  object-fit: cover;
  width: 100%;
  display: block;
  transition: transform .4s ease;
}

.item-media:hover img { transform: scale(1.02); }

.medal {
  position: absolute;
  top: 44px;
  left: -2px;
  font-family: 'Inter', sans-serif;
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  background: var(--red);
  color: #fff;
  padding: 4px 10px;
  border-radius: 999px;
}

/* ============================================================
   RELATED
   ============================================================ */
.related { padding: 10px 0 80px; }

.related h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 24px;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 44px 0;
  font-size: .85rem;
  color: var(--softer);
  background: var(--bg-alt);
  transition: background .2s;
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.site-footer a {
  text-decoration: none;
  transition: color .15s;
}

.site-footer a:hover { color: var(--red); }

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

/* ============================================================
   FOCUS & ACCESSIBILITY
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .wrap { padding: 0 20px; }
  .hero { padding: 60px 0 50px; }
  .hero h1 { font-size: clamp(2.4rem, 8vw, 3rem); }

  .item {
    grid-template-columns: 80px 1fr;
    gap: 20px;
    padding: 36px 0;
  }

  .item .rank { font-size: 3rem; }
  .medal { top: 30px; left: -2px; font-size: .6rem; }
  .toc ol { columns: 1; }
  .about-box { padding: 28px 24px; }
  .nav-links { display: none; }
}

@media (max-width: 500px) {
  .card-grid { grid-template-columns: 1fr; }
}

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