/* ============================================================
   Dominó Online — landing (pantalla de menú convertida en página real)
   Header, hero, tarjetas de dificultad, secciones de contenido SEO
   (cómo jugar / reglas / FAQ) y pie de página. Usa las variables de
   style.css (--gold, --surface, --text, etc.).
   ============================================================ */

.skip-link {
  position: fixed;
  top: -60px;
  left: 12px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--gold);
  color: #1a1305;
  font-weight: 700;
  text-decoration: none;
  transition: top 0.15s;
}

.skip-link:focus {
  top: 12px;
}

/* ---- estructura general de la landing ---- */

.screen--menu main {
  display: block;
}

.screen--menu section {
  max-width: 1040px;
  margin: 0 auto;
  padding: 56px 20px;
}

/* ---- header ---- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  background: rgba(7, 17, 13, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 16px;
}

.brand__mark {
  display: block;
  border-radius: 8px;
  flex: 0 0 auto;
}

.brand__name em {
  font-style: normal;
  color: var(--gold);
}

.site-nav {
  display: flex;
  gap: 22px;
  margin-left: auto;
  margin-right: 8px;
}

.site-nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s;
}

.site-nav a:hover {
  color: var(--text);
}

.btn--nav {
  flex: 0 0 auto;
  padding: 8px 18px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  color: #123321;
  background: linear-gradient(180deg, var(--gold-light), var(--gold-dim));
  box-shadow: 0 4px 12px rgba(242, 201, 119, 0.25);
}

.btn--nav:hover {
  filter: brightness(1.06);
}

/* ---- hero ---- */

.hero {
  padding-top: 56px !important;
  padding-bottom: 40px !important;
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 600;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(34px, 5.4vw, 54px);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(180deg, #fff, var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__sub {
  margin: 0 auto;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.5;
  color: var(--text-dim);
}

/* Panel de configuración + las dos acciones principales, juntas en el hero
   para que "jugar contra la IA" y "jugar con amigos" se vean sin hacer
   scroll (una sola decisión, visible de entrada). */
.hero__setup {
  width: min(600px, 100%);
  margin: 32px auto 0;
  text-align: left;
}

.hero__ctas {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.hero__ctas .btn {
  flex: 1 1 220px;
}

.btn--lg {
  padding: 16px 22px;
}

.btn--lg strong {
  font-size: 17px;
}

/* ---- secciones "feature" (contexto de Juega contra la IA / con amigos) ---- */
/* Las acciones en sí viven en el hero; estas secciones solo dan contexto
   y aportan la estructura de encabezados que pide el SEO. */

.feature {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.feature h2 {
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.feature p {
  margin: 0;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.6;
}

.feature--alt {
  border-top: 1px solid var(--hairline);
}

/* ---- tarjetas de dificultad ---- */

.diffcards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.diffcards button {
  font: inherit;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  text-align: left;
  padding: 12px 12px 13px;
  border-radius: 14px;
  border: 1px solid var(--hairline);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.15s;
}

.diffcards button:hover {
  border-color: rgba(242, 201, 119, 0.4);
  transform: translateY(-1px);
}

.diffcards button.is-active {
  border-color: var(--gold);
  background: rgba(242, 201, 119, 0.1);
  box-shadow: inset 0 0 0 1px rgba(242, 201, 119, 0.35);
}

.diffcards__dots {
  display: flex;
  gap: 3px;
}

.diffcards__dots i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
}

.diffcards__dots i.on {
  background: var(--gold);
}

.diffcards__name {
  font-size: 14.5px;
  font-weight: 700;
}

.diffcards__tag {
  font-size: 11.5px;
  color: var(--gold-light);
  font-weight: 600;
}

.diffcards__desc {
  font-size: 11.5px;
  color: var(--text-dim);
  line-height: 1.3;
}

/* ---- secciones de contenido (cómo jugar / reglas / FAQ) ---- */

.content {
  border-top: 1px solid var(--hairline);
}

.content h2 {
  margin: 0 0 28px;
  font-size: 24px;
  font-weight: 800;
  text-align: center;
}

.content__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.content__grid article {
  padding: 18px 20px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--hairline);
}

.content__grid h3 {
  margin: 0 0 6px;
  font-size: 15px;
  color: var(--gold-light);
}

.content__grid p {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-dim);
}

.rules-list {
  max-width: 720px;
  margin: 0 auto;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 14.5px;
  line-height: 1.55;
  color: #d5e2dc;
}

.rules-list b {
  color: var(--gold);
  font-weight: 700;
}

/* ---- FAQ ---- */

.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.faq-list details {
  border: 1px solid var(--hairline);
  border-radius: 12px;
  background: var(--surface);
  padding: 4px 18px;
}

.faq-list details[open] {
  background: var(--surface-2);
}

.faq-list summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 26px 14px 0;
  font-weight: 600;
  font-size: 15px;
  position: relative;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--gold);
  transition: transform 0.15s;
}

.faq-list details[open] summary::after {
  content: '−';
}

.faq-list p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---- footer ---- */

.site-footer {
  padding: 32px 20px 40px;
  border-top: 1px solid var(--hairline);
}

.site-footer__row {
  width: min(1040px, 100%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}

.brand--footer {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-dim);
}

.brand--footer .brand__mark {
  border-radius: 6px;
}

.site-footer nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.site-footer nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13.5px;
}

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

.site-footer__legal {
  width: min(1040px, 100%);
  margin: 14px auto 0;
  font-size: 12px;
  color: rgba(159, 179, 171, 0.6);
}

/* ---- responsive ---- */

@media (max-width: 860px) {
  .content__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .site-nav {
    display: none;
  }
  .screen--menu section {
    padding: 40px 0;
  }
  .hero {
    padding-top: 40px !important;
  }
  .diffcards {
    grid-template-columns: 1fr;
  }
  .site-footer__row {
    flex-direction: column;
    align-items: flex-start;
  }
}