:root {
  --indigo: #3f51b5;
  --indigo-deep: #1e2a78;
  --gold: #e8b93b;
  --ink: #1b1d2a;
  --muted: #5a5f73;
  --surface: #ffffff;
  --bg: #f7f8fc;
  --border: #e3e5ef;
  --radius: 14px;
  --max-width: 1040px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

p {
  margin: 0;
}

a {
  color: var(--indigo);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Los enlaces de correo solo reciben href cuando mail.js se ejecuta. Sin
   JavaScript se quedan sin él: que no parezcan pulsables en vez de roto. */
a:not([href]) {
  color: var(--muted);
  cursor: default;
}

a:not([href]):hover {
  text-decoration: none;
}

/* Cabecera */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
}

.brand:hover {
  text-decoration: none;
}

.brand img {
  border-radius: 9px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.95rem;
}

.site-nav > a:not(.btn) {
  color: var(--muted);
  font-weight: 500;
}

/* Botones */

.btn {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 12px;
  background: var(--indigo);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:hover {
  background: #354499;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-small {
  padding: 8px 16px;
  font-size: 0.9rem;
  border-radius: 10px;
}

.btn-hero {
  background: #fff;
  color: var(--indigo);
  box-shadow: 0 12px 30px rgba(9, 15, 60, 0.28);
}

.btn-hero:hover {
  background: #fff;
  color: var(--indigo-deep);
  box-shadow: 0 16px 36px rgba(9, 15, 60, 0.34);
}

.btn-outline {
  background: transparent;
  color: var(--indigo);
  border: 1.5px solid var(--indigo);
}

.btn-outline:hover {
  background: var(--indigo);
  color: #fff;
}

/* Portada */

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 18px;
  padding: 72px 24px 88px;
  background:
    radial-gradient(circle at 50% 0%, rgba(232, 185, 59, 0.22), transparent 55%),
    linear-gradient(170deg, var(--indigo) 0%, var(--indigo-deep) 100%);
  color: #fff;
}

.hero-icon {
  width: 140px;
  height: 140px;
  border-radius: 30px;
  box-shadow: 0 18px 44px rgba(9, 15, 60, 0.4);
}

.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.1rem);
  font-weight: 700;
}

.hero-slogan {
  max-width: 30ch;
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  color: rgba(255, 255, 255, 0.9);
}

.hero .btn-hero {
  margin-top: 10px;
}

.hero-note {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.72);
}

/* Secciones */

.features,
.download {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 72px 24px;
}

.features h2,
.download h2 {
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  text-align: center;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
}

/* Columnas explícitas para que las 4 tarjetas nunca dejen una fila huérfana */
@media (min-width: 620px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .feature-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature {
  padding: 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.feature h3 {
  margin-bottom: 8px;
  font-size: 1.1rem;
  color: var(--indigo-deep);
}

.feature p {
  color: var(--muted);
  font-size: 0.95rem;
}

/* Descarga */

.download {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
  border-top: 1px solid var(--border);
}

.download-intro {
  max-width: 52ch;
  color: var(--muted);
}

.store-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.store-button {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 190px;
  padding: 16px 28px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  cursor: default;
}

.store-name {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
}

.store-status {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--gold);
}

/* Pie */

.site-footer {
  padding: 36px 24px 48px;
  text-align: center;
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  font-size: 0.95rem;
}

.footer-links span {
  color: var(--border);
}

.footer-legal {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Páginas de texto (términos, 404) */

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 24px 72px;
}

.page h1 {
  font-size: clamp(1.8rem, 5vw, 2.4rem);
}

.page h2 {
  margin-top: 36px;
  font-size: 1.2rem;
  color: var(--indigo-deep);
}

.page p,
.page li {
  margin-top: 12px;
  color: #33364a;
}

.page ul {
  padding-left: 22px;
}

.page .updated {
  margin-top: 12px;
  font-size: 0.9rem;
  color: var(--muted);
}

.page-centered {
  text-align: center;
  padding-top: 96px;
}

.page-centered .btn {
  margin-top: 28px;
}

@media (max-width: 480px) {
  .site-header {
    padding: 10px 16px;
  }

  .site-nav {
    gap: 12px;
  }

  .site-nav > a:not(.btn) {
    display: none;
  }

  .hero {
    padding: 52px 20px 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn:hover {
    transform: none;
  }
}