/* Merca2 · 10º aniversario
   Marca: azul Merca2 (logo) + verde Merca2 como único acento.
   Tipografía: Playfair Display (display), PT Serif (titulares), Open Sans (texto).
   Radios: tarjetas 14px, botones en píldora. */

:root {
  --bg: #f7f9fb;
  --surface: #fdfdfd;
  --ink: #13202c;
  --ink-2: #4a5763;
  --ink-3: #6b7782;
  --navy: #0b3a66;
  --green: #72c000;
  --green-ink: #3f7a00;      /* verde para texto sobre claro (AA) */
  --line: #dde3e8;
  --shadow: 0 1px 2px rgb(11 58 102 / .06), 0 12px 32px -12px rgb(11 58 102 / .18);
  --shadow-hover: 0 2px 4px rgb(11 58 102 / .08), 0 24px 48px -16px rgb(11 58 102 / .28);
  --header-h: 68px;
  --radius: 14px;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --f-display: "Playfair Display", Georgia, serif;
  --f-serif: "PT Serif", Georgia, serif;
  --f-sans: "Open Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d141b;
    --surface: #141e28;
    --ink: #eaf0f4;
    --ink-2: #b1bcc6;
    --ink-3: #8c98a3;
    --navy: #cfe0f1;
    --green: #85c442;
    --green-ink: #9ad55a;
    --line: #243241;
    --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 12px 32px -12px rgb(0 0 0 / .55);
    --shadow-hover: 0 2px 4px rgb(0 0 0 / .35), 0 24px 48px -16px rgb(0 0 0 / .7);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 1rem); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1rem/1.65 var(--f-sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--green); outline-offset: 3px; border-radius: 4px; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
  position: absolute; left: 1rem; top: -4rem; z-index: 100;
  background: var(--navy); color: var(--bg); padding: .6rem 1rem; border-radius: 999px;
  text-decoration: none; font-weight: 600;
}
.skip:focus { top: .75rem; }

/* ------------------------------------------------------------------ Sello */
.seal__outer { fill: #0b3a66; }
.seal__rim { fill: none; stroke: #72c000; stroke-width: 2; }
.seal__ringtext { fill: #fdfdfd; font: 700 14.5px/1 var(--f-sans); letter-spacing: .5px; }
.seal__core { fill: #72c000; }
.seal__num { fill: #0b3a66; font: 900 76px/1 var(--f-display); letter-spacing: -2px; }
.seal__ord { fill: #0b3a66; font: 900 34px/1 var(--f-display); }
.seal__ring {
  transform-origin: 100px 100px;
  animation: seal-spin 40s linear infinite;
  animation-play-state: var(--spin, paused);
}
@keyframes seal-spin { to { transform: rotate(360deg); } }

/* ------------------------------------------------------------------ Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  max-width: 1320px; margin: 0 auto; height: var(--header-h);
  padding: 0 1.5rem; display: flex; align-items: center; gap: 2rem;
}
.brand { display: flex; align-items: center; gap: .9rem; text-decoration: none; flex-shrink: 0; }
.brand__logo { height: 34px; width: auto; mix-blend-mode: multiply; }
.brand__divider { width: 1px; height: 30px; background: var(--line); }
.brand__seal { width: 50px; height: 50px; flex-shrink: 0; transition: transform .6s var(--ease); }
.brand:hover .brand__seal { transform: rotate(-12deg) scale(1.06); }
.brand__label {
  font: 700 .95rem/1.1 var(--f-display); color: var(--navy); white-space: nowrap;
}
@media (prefers-color-scheme: dark) {
  /* El logo es un webp con fondo blanco: se invierte y se funde con el fondo oscuro. */
  .brand__logo { filter: invert(1) hue-rotate(180deg) brightness(1.15); mix-blend-mode: screen; }
}

.yearnav { margin-left: auto; min-width: 0; }
.yearnav__list {
  list-style: none; margin: 0; padding: 0; display: flex; gap: .15rem;
  overflow-x: auto; scrollbar-width: none;
}
.yearnav__list::-webkit-scrollbar { display: none; }
.yearnav a {
  display: block; padding: .4rem .55rem; border-radius: 999px;
  font: 600 .85rem/1 var(--f-sans); color: var(--ink-3); text-decoration: none;
  font-variant-numeric: tabular-nums;
  transition: color .25s, background-color .25s;
}
.yearnav a:hover { color: var(--ink); background: color-mix(in srgb, var(--green) 14%, transparent); }
.yearnav a.is-active { color: #13202c; background: var(--green); }

.progress {
  position: absolute; left: 0; right: 0; bottom: -1px; height: 3px;
  background: var(--green); transform-origin: 0 50%;
}
@supports (animation-timeline: scroll()) {
  .progress { animation: grow linear both; animation-timeline: scroll(root); }
  @keyframes grow { from { transform: scaleX(0); } to { transform: scaleX(1); } }
}

/* ------------------------------------------------------------------ Botones */
.btn {
  display: inline-flex; align-items: center; gap: .6rem; white-space: nowrap;
  padding: .95rem 1.6rem; border-radius: 999px; text-decoration: none;
  font: 700 1rem/1 var(--f-sans);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background-color .3s;
}
.btn--primary { background: var(--green); color: #13202c; box-shadow: 0 10px 24px -10px rgb(114 192 0 / .7); }
.btn--primary::after { content: "→"; transition: transform .3s var(--ease); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 32px -12px rgb(114 192 0 / .8); }
.btn--primary:hover::after { transform: translateX(4px); }
.btn:active { transform: translateY(1px) scale(.98); }

/* ------------------------------------------------------------------ Hero */
.hero {
  max-width: 1320px; margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
  display: grid; grid-template-columns: 1fr 1.05fr; gap: 3rem; align-items: center;
}
.hero__eyebrow {
  margin: 0 0 1.25rem; font: 700 .85rem/1 var(--f-sans); letter-spacing: .18em;
  color: var(--green-ink); font-variant-numeric: tabular-nums;
}
.hero__title {
  margin: 0; font: 900 clamp(2.7rem, 5.3vw, 4.9rem)/1.04 var(--f-display);
  letter-spacing: -.02em; color: var(--navy);
}
.hero__title em { display: block; white-space: nowrap; font-style: italic; font-weight: 700; color: var(--green-ink); padding-bottom: .06em; }
.hero__sub { margin: 1.6rem 0 2.2rem; max-width: 34ch; font: 400 1.2rem/1.55 var(--f-serif); color: var(--ink-2); }

.hero__visual { position: relative; aspect-ratio: 1 / .92; }
.hero__img { position: absolute; margin: 0; }
.hero__img img {
  width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
}
.hero__img figcaption {
  margin-top: .5rem; font: 700 .8rem/1 var(--f-sans); color: var(--ink-3);
  letter-spacing: .08em; font-variant-numeric: tabular-nums;
}
.hero__img--1 { top: 0; right: 0; width: 72%; }
.hero__img--1 figcaption { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.hero__img--1 img { aspect-ratio: 4 / 3; }
.hero__img--2 { bottom: 0; left: 0; width: 50%; }
.hero__img--2 img { aspect-ratio: 1 / 1; }
.hero__img--3 { bottom: 6%; right: 4%; width: 40%; }
.hero__img--3 img { aspect-ratio: 4 / 3; }
.hero__seal {
  position: absolute; top: 34%; left: 8%; width: clamp(130px, 15vw, 200px); height: auto; aspect-ratio: 1;
  --spin: running;
  filter: drop-shadow(0 18px 30px rgb(11 58 102 / .35));
}

/* ------------------------------------------------------------------ Sponsors */
.sponsors { background: #fff; border-block: 1px solid var(--line); padding: 1.5rem 1.5rem; }
.sponsors picture { display: block; max-width: 920px; margin: 0 auto; }
.sponsors__img { display: block; width: 100%; height: auto; }

/* ------------------------------------------------------------------ Intro */
.intro { max-width: 1320px; margin: 0 auto; padding: 5rem 1.5rem 6rem; display: grid; grid-template-columns: repeat(12, 1fr); }
.intro__lead {
  grid-column: 1 / span 9; margin: 0;
  font: 400 clamp(1.45rem, 2.6vw, 2.15rem)/1.4 var(--f-serif); color: var(--ink);
}
.intro__lead strong { font-weight: 700; color: var(--green-ink); }
.intro__body { grid-column: 4 / span 7; margin: 2rem 0 0; font-size: 1.1rem; color: var(--ink-2); max-width: 60ch; }
.stats {
  grid-column: 4 / -1; margin: 3.5rem 0 0; display: grid; grid-template-columns: repeat(3, auto); justify-content: start; gap: 1rem 4rem;
}
.stats__item { display: flex; flex-direction: column-reverse; }
.stats dd { margin: 0; font: 900 clamp(3rem, 6vw, 4.8rem)/1 var(--f-display); color: var(--navy); font-variant-numeric: lining-nums tabular-nums; }
.stats dt { margin-top: .4rem; font-weight: 600; color: var(--ink-3); }

/* ------------------------------------------------------------------ Timeline */
.timeline { position: relative; max-width: 1240px; margin: 0 auto; padding: 0 1.5rem 4rem; --gutter: 3.25rem; }
.year { position: relative; padding: 3rem 0 5rem; }
.year::before, .year::after {
  content: ""; position: absolute; top: 0; bottom: 0; left: 50%; width: 2px; margin-left: -1px;
}
.year::before { background: var(--line); }
.year::after { background: var(--green); transform-origin: 50% 0; transform: scaleY(1); }
@supports (animation-timeline: view()) {
  .year::after {
    animation: line-fill linear both;
    animation-timeline: view();
    animation-range: entry 10% exit 40%;
  }
  @keyframes line-fill { from { transform: scaleY(0); } to { transform: scaleY(1); } }
}

.year__head { position: relative; z-index: 1; display: flex; justify-content: center; margin-bottom: 3.5rem; }
.year__num {
  position: relative; margin: 0; padding: .2rem 1.5rem; background: var(--bg);
  font: 900 clamp(4rem, 11vw, 8.5rem)/1 var(--f-display); letter-spacing: -.03em;
  color: var(--navy); font-variant-numeric: lining-nums;
}
.year__num::after {
  content: ""; display: block; width: 14px; height: 14px; margin: 1.1rem auto 0; border-radius: 50%;
  background: var(--green); box-shadow: 0 0 0 6px var(--bg), 0 0 0 7px var(--green);
}
.year__grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr; column-gap: calc(2 * var(--gutter)); align-items: start;
}
.year__col { list-style: none; margin: 0; padding: 0; display: grid; gap: 3rem; }
.year__col--r { padding-top: 11rem; }

.card { position: relative; }
.card::before {
  content: ""; position: absolute; top: 2.25rem; width: 12px; height: 12px; border-radius: 50%;
  background: var(--bg); border: 3px solid var(--green);
}
.card::after {
  content: ""; position: absolute; top: calc(2.25rem + 5px); height: 2px; width: calc(var(--gutter) - 12px); background: var(--line);
}
.card--l::before { right: calc(-1 * var(--gutter) - 6px); }
.card--l::after { right: calc(-1 * var(--gutter) + 6px); }
.card--r::before { left: calc(-1 * var(--gutter) - 6px); }
.card--r::after { left: calc(-1 * var(--gutter) + 6px); }

.card__link {
  display: block; text-decoration: none; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .5s var(--ease), box-shadow .5s var(--ease), border-color .3s;
}
.card__link:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: color-mix(in srgb, var(--green) 55%, var(--line)); }
.card__link:focus-visible { outline-offset: 4px; border-radius: var(--radius); }
.card__media { margin: 0; aspect-ratio: 16 / 9; overflow: hidden; background: color-mix(in srgb, var(--navy) 10%, var(--surface)); }
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease); }
.card__link:hover .card__media img { transform: scale(1.05); }
.card__placeholder {
  display: grid; place-items: center; height: 100%;
  background: #0b3a66; color: #72c000; font: 900 4rem/1 var(--f-display);
}
.card__body { padding: 1.4rem 1.5rem 1.3rem; }
.card__client { margin: 0 0 .55rem; font: 700 .78rem/1.2 var(--f-sans); letter-spacing: .1em; text-transform: uppercase; color: var(--green-ink); }
.card__title { margin: 0; font: 700 1.3rem/1.3 var(--f-serif); color: var(--ink); text-wrap: balance; }
.card__excerpt {
  margin: .7rem 0 0; color: var(--ink-2); font-size: .95rem; line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.card__meta {
  margin: 1.1rem 0 0; padding-top: .9rem; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  font-size: .85rem; color: var(--ink-3);
}
.card__cta { font-weight: 700; color: var(--green-ink); white-space: nowrap; }
.card__cta::after { content: "→"; margin-left: .35em; display: inline-block; transition: transform .3s var(--ease); }
.card__link:hover .card__cta::after { transform: translateX(4px); }

/* ------------------------------------------------------------------ Cierre */
.closing { max-width: 820px; margin: 0 auto; padding: 5rem 1.5rem 7rem; text-align: center; }
.closing__seal { width: 150px; height: 150px; margin: 0 auto 2rem; display: block; --spin: running; }
.closing__title { margin: 0; font: 900 clamp(2.4rem, 5vw, 4rem)/1.08 var(--f-display); color: var(--navy); letter-spacing: -.02em; }
.closing__text { margin: 1.2rem auto 2.4rem; max-width: 46ch; font: 400 1.2rem/1.55 var(--f-serif); color: var(--ink-2); }

/* ------------------------------------------------------------------ Footer (oscuro, como merca2.es) */
.site-footer { background: #0c1217; color: #9aa6b1; border-top: 4px solid #72c000; }
.site-footer__inner {
  max-width: 1320px; margin: 0 auto; padding: 2.5rem 1.5rem;
  display: flex; flex-wrap: wrap; align-items: center; gap: 1.5rem 3rem;
}
.site-footer__brand img { height: 35px; width: auto; }
.network { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 1.25rem 2rem; }
.network img { height: 26px; width: auto; opacity: .7; transition: opacity .25s; }
.network a:hover img { opacity: 1; }
.site-footer__copy { margin: 0 0 0 auto; font-size: .85rem; }

/* ------------------------------------------------------------------ Animaciones de entrada (solo con JS y sin reduced-motion) */
@media (prefers-reduced-motion: no-preference) {
  .js .reveal, .js .card { opacity: 0; transform: translateY(36px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
  .js .card { transition-delay: calc(min(var(--i, 0), 1) * 90ms); }
  .js .reveal.is-in, .js .card.is-in { opacity: 1; transform: none; }

  .js .year__num { opacity: 0; transform: scale(.92); transition: opacity 1s var(--ease), transform 1s var(--ease); }
  .js .year.is-in .year__num { opacity: 1; transform: none; }

  .hero__text > * { animation: rise 1s var(--ease) both; }
  .hero__text > :nth-child(2) { animation-delay: .1s; }
  .hero__text > :nth-child(3) { animation-delay: .2s; }
  .hero__text > :nth-child(4) { animation-delay: .3s; }
  .hero__img { animation: rise 1.2s var(--ease) both; }
  .hero__img--1 { animation-delay: .15s; }
  .hero__img--2 { animation-delay: .3s; }
  .hero__img--3 { animation-delay: .45s; }
  .hero__seal { animation: seal-in 1.4s .6s var(--ease) both; }
  .brand__seal { animation: seal-in 1.2s .2s var(--ease) both; }
  @keyframes rise { from { opacity: 0; transform: translateY(40px); } }
  @keyframes seal-in { from { opacity: 0; transform: scale(.4) rotate(-120deg); } }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .seal__ring { animation: none; }
  .card__link, .card__media img, .btn { transition: none; }
}

/* ------------------------------------------------------------------ Responsive */
@media (max-width: 1100px) {
  .brand__label { display: none; }
}
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 3rem; min-height: auto; gap: 3.5rem; }
  .hero__visual { max-width: 560px; width: 100%; justify-self: center; }
  .intro__lead, .intro__body, .stats { grid-column: 1 / -1; }
}
.menu-toggle { display: none; }

@media (max-width: 767px) {
  :root { --header-h: 64px; }
  .site-header__inner { padding: 0 1rem; gap: .75rem; }
  .brand { gap: .7rem; }
  .brand__logo { height: 28px; }
  .brand__seal { width: 42px; height: 42px; }
  .brand__divider { height: 26px; }

  /* Menú hamburguesa de años */
  .menu-toggle {
    display: inline-flex; align-items: center; gap: .6rem; margin-left: auto;
    padding: .5rem .6rem .5rem .9rem; border: 1px solid var(--line); border-radius: 999px;
    background: var(--surface); color: var(--ink); cursor: pointer;
    font: 700 .9rem/1 var(--f-sans); font-variant-numeric: tabular-nums;
  }
  .menu-toggle:active { transform: scale(.97); }
  .menu-toggle__icon { position: relative; width: 26px; height: 26px; border-radius: 50%; background: var(--green); }
  .menu-toggle__icon span, .menu-toggle__icon::before, .menu-toggle__icon::after {
    content: ""; position: absolute; left: 7px; right: 7px; height: 2px; border-radius: 2px; background: #13202c;
    transition: transform .35s var(--ease), opacity .2s;
  }
  .menu-toggle__icon::before { top: 8px; }
  .menu-toggle__icon span { top: 12px; }
  .menu-toggle__icon::after { top: 16px; }
  .menu-toggle[aria-expanded="true"] .menu-toggle__icon::before { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] .menu-toggle__icon span { opacity: 0; }
  .menu-toggle[aria-expanded="true"] .menu-toggle__icon::after { transform: translateY(-4px) rotate(-45deg); }

  .yearnav {
    position: absolute; top: 100%; left: 0; right: 0; margin: 0;
    background: var(--surface); border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px -24px rgb(11 58 102 / .35);
    padding: 1rem 1rem 1.25rem;
    visibility: hidden; opacity: 0; transform: translateY(-8px);
    transition: opacity .3s var(--ease), transform .3s var(--ease), visibility 0s .3s;
  }
  .yearnav.is-open { visibility: visible; opacity: 1; transform: none; transition-delay: 0s; }
  .yearnav__list { display: grid; grid-template-columns: repeat(4, 1fr); gap: .5rem; overflow: visible; }
  .yearnav a { text-align: center; padding: .85rem 0; font-size: 1rem; border: 1px solid var(--line); }
  .yearnav a.is-active { border-color: var(--green); }
  .hero { padding: 2rem 1rem 2.5rem; }
  .sponsors { padding: 1rem; }
  .sponsors picture { max-width: 500px; }
  .hero__sub { font-size: 1.1rem; }
  .intro { padding: 3rem 1rem 4rem; }
  .stats { grid-template-columns: repeat(3, 1fr); gap: 1rem; }
  .stats dt { font-size: .85rem; line-height: 1.3; }

  .timeline { padding: 0 1rem 3rem; --gutter: 2.25rem; }
  .year { padding: 2rem 0 3rem; }
  .year::before, .year::after { left: 7px; }
  .year__head { justify-content: flex-start; margin-bottom: 2rem; }
  .year__num { padding: .2rem 0 .2rem 1.75rem; background: none; }
  .year__num::after { position: absolute; left: 0; top: 50%; margin: -7px 0 0; }
  /* Una sola columna en el orden original del año. */
  .year__grid { display: flex; flex-direction: column; gap: 1.5rem; margin-left: var(--gutter); }
  .year__col { display: contents; }
  .year__col--r { padding-top: 0; }
  .card { order: var(--i); }
  .card--l::before, .card--r::before { left: calc(-1 * var(--gutter) + 2px); right: auto; }
  .card--l::after, .card--r::after { left: calc(-1 * var(--gutter) + 14px); right: auto; width: calc(var(--gutter) - 14px); }
  .card__body { padding: 1.2rem 1.2rem 1.1rem; }
  .card__title { font-size: 1.15rem; }

  .site-footer__copy { margin-left: 0; }
}