/* Web de «¿Cuántos Granos Hay?». Sin fuentes ni scripts de terceros. */

:root {
  --sand-50: #fffaf2;
  --sand-100: #fdf1e0;
  --sand-200: #f8dfb4;
  --sand-300: #f0c77e;
  --sand-400: #e3ad5a;
  --brown-900: #3d2c1e;
  --brown-700: #5c4630;
  --brown-500: #7a5a10;
  --gold: #ffd54f;
  --sea-700: #1f6f8b;
  --sea-500: #2e9cc0;
  --sea-300: #7fcbe0;
  --foam: #ffffff;

  --bg: var(--sand-50);
  --bg-alt: var(--sand-100);
  --card: #ffffff;
  --text: var(--brown-900);
  --muted: var(--brown-700);
  --accent: var(--brown-500);
  --accent-text: #ffffff;
  --border: rgba(61, 44, 30, 0.12);
  --shadow: 0 10px 30px rgba(61, 44, 30, 0.12);

  --radius: 20px;
  --max: 1120px;
  --font-title: "Ubuntu", "Nunito", "Segoe UI", system-ui, -apple-system,
    sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Ubuntu",
    sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d1712;
    --bg-alt: #261e17;
    --card: #2e241c;
    --text: #f6eadb;
    --muted: #d4c2ac;
    --accent: #f0c77e;
    --accent-text: #2b1f14;
    --border: rgba(246, 234, 219, 0.14);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--sea-700);
}

@media (prefers-color-scheme: dark) {
  a {
    color: var(--sea-300);
  }
}

h1,
h2,
h3 {
  font-family: var(--font-title);
  line-height: 1.15;
  margin: 0 0 0.5em;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

h3 {
  font-size: 1.2rem;
}

.wrap {
  width: min(100% - 32px, var(--max));
  margin-inline: auto;
}

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  left: 16px;
  top: 16px;
  z-index: 10;
  background: var(--card);
  padding: 8px 12px;
  border-radius: 8px;
}

/* ------------------------------------------------------------ Cabecera */

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-title);
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

.nav {
  display: flex;
  gap: 20px;
  margin-left: auto;
  align-items: center;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
}

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

.lang {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 0.9rem;
}

@media (max-width: 760px) {
  .nav .hide-sm {
    display: none;
  }

  .brand span {
    font-size: 0.95rem;
  }
}

/* ------------------------------------------------------------ Portada */

.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(
    180deg,
    #fde7b8 0%,
    #fbd58e 46%,
    var(--sea-500) 46%,
    var(--sea-500) 58%,
    var(--sand-300) 58%,
    var(--sand-400) 100%
  );
  color: var(--brown-900);
}

.hero::before {
  /* el sol */
  content: "";
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: #fff4d2;
  top: 40px;
  right: 8%;
  opacity: 0.85;
}

.hero .wrap {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 32px;
  align-items: center;
  padding: 64px 0 72px;
}

.hero-text {
  background: rgba(255, 250, 242, 0.92);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  margin-bottom: 0.25em;
}

.hero .tagline {
  font-size: 1.25rem;
  color: var(--brown-700);
  margin: 0 0 1.5em;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--brown-500);
  color: #fff;
}

.btn-primary[aria-disabled="true"] {
  cursor: default;
}

.btn-ghost {
  border-color: var(--brown-500);
  color: var(--brown-500);
  background: transparent;
}

.btn small {
  display: block;
  font-weight: 500;
  font-size: 0.75rem;
  opacity: 0.85;
  line-height: 1.1;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.badges li {
  background: var(--sand-100);
  border: 1px solid rgba(61, 44, 30, 0.12);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 0.9rem;
  color: var(--brown-700);
}

.phone {
  width: min(300px, 100%);
  margin-inline: auto;
  border-radius: 36px;
  padding: 10px;
  background: #2b2119;
  box-shadow: 0 30px 60px rgba(61, 44, 30, 0.35);
}

.phone img {
  border-radius: 28px;
  aspect-ratio: 9 / 16;
  width: 100%;
  height: auto;
}

@media (max-width: 860px) {
  .hero {
    background: linear-gradient(
      180deg,
      #fde7b8 0%,
      #fbd58e 55%,
      var(--sand-300) 55%,
      var(--sand-400) 100%
    );
  }

  .hero .wrap {
    grid-template-columns: 1fr;
    padding: 32px 0 48px;
  }

  .hero-text {
    padding: 24px;
  }

  .hero::before {
    width: 70px;
    height: 70px;
    top: 16px;
  }
}

/* Ola entre secciones */
.wave {
  display: block;
  width: 100%;
  height: 40px;
  color: var(--bg);
  margin-top: -39px;
  position: relative;
}

/* ------------------------------------------------------------ Cifras */

.stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin: 48px auto 0;
  padding: 0;
  list-style: none;
  text-align: center;
}

.stats li {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 8px;
}

.stats strong {
  display: block;
  font-family: var(--font-title);
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--accent);
}

.stats span {
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 760px) {
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats li:last-child {
    grid-column: span 2;
  }
}

/* ------------------------------------------------------------ Secciones */

section {
  padding: 72px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.lead {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 46em;
  margin: 0 0 32px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.card .emoji {
  font-size: 2rem;
  line-height: 1;
  display: block;
  margin-bottom: 12px;
}

.card p {
  margin: 0;
  color: var(--muted);
}

/* Pasos */
.steps {
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 0;
  list-style: none;
}

.steps li {
  counter-increment: step;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}

.steps li::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-text);
  font-family: var(--font-title);
  font-weight: 700;
  margin-bottom: 12px;
}

.steps p {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 760px) {
  .steps {
    grid-template-columns: 1fr;
  }
}

/* ------------------------------------------------------------ Capturas */

.gallery {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 240px;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 8px 4px 24px;
  margin: 0;
  list-style: none;
}

.gallery li {
  scroll-snap-align: start;
}

.gallery figure {
  margin: 0;
}

.gallery img {
  border-radius: 24px;
  border: 6px solid #2b2119;
  box-shadow: var(--shadow);
  aspect-ratio: 9 / 16;
  width: 100%;
  height: auto;
  background: var(--sand-100);
}

.gallery figcaption {
  margin-top: 12px;
  font-size: 0.95rem;
  color: var(--muted);
}

.gallery figcaption strong {
  display: block;
  color: var(--text);
}

.hint {
  font-size: 0.9rem;
  color: var(--muted);
}

/* ------------------------------------------------------------ Promesa */

.promise {
  background: var(--sea-700);
  color: #fff;
  text-align: center;
}

.promise h2 {
  color: #fff;
}

.promise ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  padding: 0;
  margin: 24px 0;
  list-style: none;
}

.promise li {
  background: rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  padding: 8px 18px;
  font-weight: 600;
}

.promise a {
  color: #fff;
  font-weight: 700;
}

/* ------------------------------------------------------------ Preguntas */

.faq details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px 20px;
  margin-bottom: 12px;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
}

.faq details p {
  margin: 12px 0 0;
  color: var(--muted);
}

/* ------------------------------------------------------------ Pie */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0 48px;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  justify-content: space-between;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ------------------------------------------------------------ Textos legales */

.legal {
  padding: 48px 0 72px;
}

.legal .wrap {
  max-width: 760px;
}

.legal h1 {
  font-size: clamp(2rem, 5vw, 2.8rem);
}

.legal h2 {
  font-size: 1.4rem;
  margin-top: 2em;
}

.legal .updated {
  color: var(--muted);
}

.legal .summary {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 24px 0;
}

.legal .summary ul {
  margin: 0;
  padding-left: 1.2em;
}

/* Datos que faltan por rellenar antes de publicar */
.todo {
  background: #ffe08a;
  color: #3d2c1e;
  border-radius: 6px;
  padding: 0 6px;
  font-weight: 700;
}

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