:root {
  --primary: #003eb1;
  --primary-dark: #001d5a;
  --secondary: #fedf02;
  --white: #ffffff;
  --ink: #06143a;
}

* { box-sizing: border-box; }

html { min-height: 100%; background: var(--primary-dark); }

body {
  min-width: 320px;
  min-height: 100%;
  margin: 0;
  color: var(--white);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.background {
  position: fixed;
  z-index: -3;
  inset: -14px;
  background: url("fondo-corredores.jpg") center 42% / cover no-repeat;
  filter: blur(3px) saturate(.82);
  transform: scale(1.03);
}

.overlay {
  position: fixed;
  z-index: -2;
  inset: 0;
  background:
    radial-gradient(circle at 50% 34%, rgba(0, 62, 177, .15) 0 25%, rgba(0, 29, 90, .7) 75%),
    linear-gradient(180deg, rgba(0, 25, 76, .52), rgba(0, 16, 55, .86));
}

.landing {
  width: min(1180px, calc(100% - 36px));
  min-height: 100svh;
  margin: 0 auto;
  padding: clamp(26px, 5vh, 58px) 0 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: clamp(28px, 5vh, 54px);
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.event-date {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  padding: 8px 14px;
  color: rgba(255,255,255,.9);
  background: rgba(0, 20, 67, .46);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 999px;
  backdrop-filter: blur(10px);
  font-size: clamp(.76rem, 1.8vw, .9rem);
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.event-date span { color: var(--secondary); font-size: .7rem; }

.logo-panel {
  width: min(660px, 86vw);
  padding: clamp(15px, 2.4vw, 24px);
  background: rgba(255,255,255,.96);
  border: 1px solid rgba(255,255,255,.65);
  border-radius: clamp(18px, 3vw, 30px);
  box-shadow: 0 28px 80px rgba(0, 12, 48, .42);
  backdrop-filter: blur(16px);
}

.logo-panel img { display: block; width: 100%; height: auto; }

.countdown-label {
  margin: clamp(22px, 4vh, 38px) 0 10px;
  color: var(--secondary);
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .23em;
  text-transform: uppercase;
}

.countdown {
  display: grid;
  grid-template-columns: repeat(4, minmax(80px, 118px));
  gap: clamp(8px, 1.5vw, 14px);
}

.time-card {
  min-width: 0;
  padding: clamp(12px, 2vw, 18px) 10px 11px;
  background: rgba(0, 21, 70, .58);
  border: 1px solid rgba(255,255,255,.21);
  border-radius: 16px;
  box-shadow: 0 12px 35px rgba(0, 9, 38, .2);
  backdrop-filter: blur(14px);
}

.time-card strong {
  display: block;
  font-variant-numeric: tabular-nums;
  font-size: clamp(2rem, 5vw, 3.7rem);
  line-height: .9;
  letter-spacing: -.06em;
}

.time-card span {
  display: block;
  margin-top: 9px;
  color: rgba(255,255,255,.68);
  font-size: clamp(.62rem, 1.8vw, .76rem);
  font-weight: 750;
  letter-spacing: .11em;
  text-transform: uppercase;
}

.countdown-finished { margin: 18px 0 0; font-size: 1.2rem; font-weight: 850; }

.register-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 56px;
  margin-top: clamp(20px, 3.5vh, 32px);
  padding: 13px 28px;
  color: var(--primary-dark);
  background: var(--secondary);
  border: 2px solid rgba(255,255,255,.28);
  border-radius: 14px;
  box-shadow: 0 16px 36px rgba(0, 12, 48, .3);
  font-size: 1rem;
  font-weight: 900;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: .055em;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}

.register-button:hover,
.register-button:focus-visible {
  transform: translateY(-3px);
  background: #ffe93e;
  box-shadow: 0 21px 45px rgba(0, 12, 48, .42);
}

.register-button:focus-visible { outline: 3px solid white; outline-offset: 4px; }

.quick-links {
  width: min(650px, 100%);
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.quick-card {
  aspect-ratio: 1;
  min-width: 0;
  padding: 13px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  background: rgba(0, 30, 94, .7);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 9, 38, .2);
  backdrop-filter: blur(12px);
  cursor: pointer;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}

.quick-card:hover,
.quick-card:focus-visible { transform: translateY(-3px); background: rgba(0, 62, 177, .92); border-color: var(--secondary); }
.quick-card:focus-visible { outline: 3px solid white; outline-offset: 3px; }
.quick-card span { color: var(--secondary); font-size: .62rem; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
.quick-card strong { margin-top: 5px; font-size: clamp(1.12rem, 2.5vw, 1.65rem); line-height: 1; letter-spacing: -.04em; }
.quick-card small { margin-top: 8px; color: rgba(255,255,255,.68); font-size: .68rem; }
.quick-bases { color: var(--primary-dark); background: rgba(254, 223, 2, .94); }
.quick-bases span, .quick-bases small { color: rgba(0, 29, 90, .72); }
.quick-bases:hover, .quick-bases:focus-visible { color: var(--primary-dark); background: var(--secondary); }

.sponsors {
  width: 100%;
  padding: 18px 0 0;
}

.sponsors-heading {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 15px;
  width: min(580px, 100%);
  margin: 0 auto 14px;
}

.sponsors-heading span { height: 1px; background: linear-gradient(90deg, transparent, rgba(255,255,255,.5)); }
.sponsors-heading span:last-child { background: linear-gradient(90deg, rgba(255,255,255,.5), transparent); }
.sponsors-heading h2 { margin: 0; font-size: .72rem; letter-spacing: .22em; text-transform: uppercase; }

.sponsor-viewport {
  overflow: hidden;
  padding: 4px 0;
  mask-image: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent);
}

.sponsor-track {
  --slide-duration: calc(16s + (var(--sponsor-count) * 3s));
  display: flex;
  width: max-content;
  animation: sponsor-slide var(--slide-duration) linear infinite;
}

.sponsor-track:hover { animation-play-state: paused; }
.sponsor-track.is-static { width: 100%; animation: none; }

.sponsor-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding-right: 18px;
}

.sponsor-track.is-static .sponsor-group { width: 100%; padding: 0; }

.sponsor-card {
  display: grid;
  place-items: center;
  width: clamp(150px, 17vw, 220px);
  height: 100px;
  margin: 0;
  padding: 13px 20px;
  background: rgba(255,255,255,.95);
  border: 1px solid rgba(255,255,255,.7);
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 14, 51, .2);
}

.sponsor-card img { display: block; max-width: 100%; max-height: 100%; object-fit: contain; }

.sponsor-empty {
  width: min(420px, 100%);
  margin: 0 auto;
  padding: 13px 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  color: rgba(255,255,255,.7);
  background: rgba(0, 20, 67, .42);
  border: 1px dashed rgba(255,255,255,.28);
  border-radius: 13px;
  backdrop-filter: blur(10px);
  font-size: .82rem;
}

.sponsor-empty strong { color: var(--secondary); }

.modal {
  width: min(900px, calc(100% - 28px));
  max-width: none;
  max-height: calc(100dvh - 28px);
  margin: auto;
  padding: 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  overflow: visible;
}

.modal::backdrop { background: rgba(0, 12, 48, .78); backdrop-filter: blur(8px); }

.modal-card {
  max-height: calc(100dvh - 28px);
  display: flex;
  flex-direction: column;
  background: white;
  border: 1px solid rgba(255,255,255,.75);
  border-radius: 22px;
  box-shadow: 0 30px 100px rgba(0, 8, 35, .5);
  overflow: hidden;
}

.modal-header {
  flex: none;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: white;
  background: var(--primary);
}

.modal-header span { color: var(--secondary); font-size: .65rem; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
.modal-header h2 { margin: 2px 0 0; font-size: clamp(1.35rem, 3vw, 2rem); letter-spacing: -.035em; }

.modal-close {
  flex: none;
  width: 42px;
  height: 42px;
  padding: 0 0 4px;
  color: white;
  background: rgba(255,255,255,.13);
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 50%;
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
}

.modal-close:hover, .modal-close:focus-visible { color: var(--primary-dark); background: var(--secondary); }
.modal-close:focus-visible { outline: 3px solid white; outline-offset: 2px; }

.modal-body { min-height: 0; padding: 24px; overflow: auto; overscroll-behavior: contain; }
.map-body { padding: 12px; background: #eef3f8; }
.map-body img { display: block; width: min(100%, 780px); height: auto; margin: 0 auto; border-radius: 13px; }

.bases-content h3 { margin: 24px 0 10px; color: var(--primary); }
.bases-highlight { padding: 16px 18px; display: flex; justify-content: space-between; gap: 12px; color: var(--primary-dark); background: #fff9c7; border-left: 5px solid var(--secondary); border-radius: 10px; }
.bases-highlight span { color: #526078; }
.bases-list { margin: 0; padding: 0; display: grid; gap: 8px; list-style: none; }
.bases-list li { padding: 12px 14px; display: grid; gap: 2px; background: #f4f7fc; border-radius: 9px; }
.bases-list span { color: #667085; font-size: .88rem; }
.bases-note { margin: 18px 0; color: #667085; font-size: .9rem; }
.modal-action { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 10px 18px; color: white; background: var(--primary); border-radius: 10px; font-weight: 850; text-decoration: none; }

html.modal-open { overflow: hidden; }

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

@keyframes sponsor-slide {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@media (max-width: 600px) {
  .landing { width: min(100% - 24px, 1180px); padding-top: 20px; gap: 28px; }
  .event-date { margin-bottom: 16px; letter-spacing: .04em; }
  .logo-panel { width: 100%; padding: 12px; border-radius: 17px; }
  .countdown { width: 100%; grid-template-columns: repeat(4, 1fr); gap: 6px; }
  .time-card { padding: 12px 4px 9px; border-radius: 11px; }
  .time-card strong { font-size: clamp(1.7rem, 10vw, 2.5rem); }
  .time-card span { letter-spacing: .04em; }
  .register-button { width: min(100%, 320px); }
  .quick-links { grid-template-columns: repeat(2, minmax(0, 1fr)); width: min(340px, 100%); gap: 8px; }
  .quick-card { border-radius: 13px; }
  .sponsor-card { width: 145px; height: 76px; padding: 11px 15px; }
  .sponsor-empty { flex-direction: column; }
  .modal { width: calc(100% - 16px); max-height: calc(100dvh - 16px); }
  .modal-card { max-height: calc(100dvh - 16px); border-radius: 16px; }
  .modal-header { padding: 14px 15px; }
  .modal-close { width: 38px; height: 38px; }
  .modal-body { padding: 16px; }
  .map-body { padding: 7px; }
  .map-body img { border-radius: 10px; }
  .bases-highlight { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
  .sponsor-track { width: 100%; animation: none; overflow-x: auto; }
  .sponsor-group[aria-hidden="true"] { display: none; }
  .sponsor-group { justify-content: flex-start; }
  .register-button { transition: none; }
}