/* whyads.app (ADR-0027). Mismos tokens y estilo que la app (design-system/whyads/MASTER.md, ADR-0019):
   profundidad y brillo, Poppins + Open Sans, CTA en degradado. Sin JavaScript. */

:root {
  --brand-orange: #e85d2b;
  --primary: #0e3b7d;
  --cta-text: #ffffff;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-hover: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --success: #15803d;
  --logo-wordmark: #0e3b7d;
  --surface-glass: rgba(255, 255, 255, 0.86);
  --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.04), 0 10px 28px -14px rgba(15, 23, 42, 0.16);
  --shadow-float: 0 24px 48px -16px rgba(15, 23, 42, 0.3);
  --highlight: inset 0 1px 0 rgba(255, 255, 255, 0.8);
  --glow-orange: rgba(232, 93, 43, 0.22);
  --glow-navy: rgba(14, 59, 125, 0.16);
  --grid-dot: rgba(14, 59, 125, 0.1);
  --cta-gradient: linear-gradient(180deg, #c94a1c, #a93f18);
  --cta-gradient-hover: linear-gradient(180deg, #b8461d, #96360f);
  --cta-glow: 0 10px 26px -8px rgba(201, 74, 28, 0.6);
  --accent-gradient: linear-gradient(135deg, #e85d2b, #0e3b7d);
  --tint: rgba(14, 59, 125, 0.04);
  --radius: 10px;
  --radius-lg: 14px;
  --transition: 180ms ease;
  --font-heading: "Poppins", system-ui, sans-serif;
  --font-body: "Open Sans", system-ui, sans-serif;
  --container: 1120px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #7fa8e8;
    --cta-text: #0b1220;
    --bg: #0b1220;
    --surface: #111a2e;
    --surface-hover: #18233b;
    --text: #f0f4fa;
    --muted: #94a3b8;
    --border: #24304a;
    --border-strong: #33415f;
    --success: #4ade80;
    --logo-wordmark: #f0f4fa;
    --surface-glass: rgba(17, 26, 46, 0.8);
    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 14px 34px -16px rgba(0, 0, 0, 0.7);
    --shadow-float: 0 24px 48px -12px rgba(0, 0, 0, 0.65);
    --highlight: inset 0 1px 0 rgba(255, 255, 255, 0.06);
    --glow-orange: rgba(255, 122, 69, 0.22);
    --glow-navy: rgba(59, 110, 210, 0.28);
    --grid-dot: rgba(148, 163, 184, 0.09);
    /* texto oscuro ≥ 6,57:1 en todo el degradado */
    --cta-gradient: linear-gradient(180deg, #ff8a57, #ff6a35);
    --cta-gradient-hover: linear-gradient(180deg, #ff9466, #ff7a45);
    --cta-glow: 0 10px 30px -6px rgba(255, 122, 69, 0.55);
    --accent-gradient: linear-gradient(135deg, #ff7a45, #7fa8e8);
    --tint: rgba(127, 168, 232, 0.05);
    color-scheme: dark;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Fondo con brillo ambiente y trama de puntos, como la app */
body::before,
body::after {
  content: "";
  position: fixed;
  z-index: -1;
  pointer-events: none;
}

body::before {
  inset: -10%;
  background:
    radial-gradient(44rem 34rem at 92% 6%, var(--glow-orange), transparent 70%),
    radial-gradient(44rem 38rem at 6% 96%, var(--glow-navy), transparent 70%);
  animation: ambient 28s ease-in-out infinite alternate;
}

body::after {
  inset: 0;
  background-image: radial-gradient(var(--grid-dot) 1px, transparent 1.5px);
  background-size: 22px 22px;
  mask-image: linear-gradient(180deg, #000, transparent 55%);
}

@keyframes ambient {
  to {
    transform: translate3d(-3%, 4%, 0) scale(1.06);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  body::before {
    animation: none;
  }
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  line-height: 1.2;
  margin: 0;
}

p {
  margin: 0;
}

a {
  color: var(--primary);
  text-underline-offset: 3px;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--primary) 55%, transparent);
  outline-offset: 2px;
  border-radius: 6px;
}

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

.narrow {
  width: min(760px, 100% - 32px);
}

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

.skip {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 50;
  padding: 10px 16px;
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-float);
}

.skip:focus {
  top: 12px;
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font: 600 1rem/1 var(--font-body);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
}

.btn-sm {
  min-height: 44px;
  padding: 10px 16px;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--cta-gradient);
  color: var(--cta-text);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 4px 12px -6px rgba(201, 74, 28, 0.6);
}

.btn-primary:hover {
  background: var(--cta-gradient-hover);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.2),
    var(--cta-glow);
}

.btn-secondary {
  background: var(--surface-glass);
  color: var(--primary);
  border-color: var(--border-strong);
  box-shadow: var(--highlight);
}

.btn-secondary:hover {
  background: var(--surface-hover);
}

/* ---------- Cabecera ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--surface-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  color: var(--logo-wordmark);
}

/* El SVG del logo trae aire alrededor: con 56px el símbolo queda de ~36px, como en la app */
.logo-svg {
  display: block;
  width: auto;
  height: 56px;
  margin-block: -6px;
}

.header-nav {
  display: flex;
  gap: 4px;
  margin-inline: auto;
}

.header-nav a,
.link-login {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  border-radius: var(--radius);
  color: var(--text);
  font-weight: 500;
  text-decoration: none;
  transition: background-color var(--transition), color var(--transition);
}

.header-nav a:hover,
.link-login:hover {
  background: var(--surface-hover);
  color: var(--primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Selector de idioma (sin JavaScript: <details>) */
.lang-menu {
  position: relative;
}

.lang-menu summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 0 10px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-glass);
  color: var(--text);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--transition), border-color var(--transition);
}

.lang-menu summary::-webkit-details-marker {
  display: none;
}

.lang-menu summary:hover {
  background: var(--surface-hover);
  border-color: var(--border-strong);
}

.lang-menu summary svg:last-child {
  color: var(--muted);
  transition: transform var(--transition);
}

.lang-menu[open] summary svg:last-child {
  transform: rotate(180deg);
}

.lang-menu ul {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  z-index: 30;
  min-width: 200px;
  margin: 0;
  padding: 6px;
  list-style: none;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-float);
}

.lang-menu li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 44px;
  padding: 0 12px;
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
}

.lang-menu li a:hover {
  background: var(--surface-hover);
  color: var(--primary);
}

.lang-menu li a[aria-current] {
  font-weight: 600;
  color: var(--primary);
}

@media (max-width: 900px) {
  .header-nav {
    display: none;
  }
  .header-actions {
    margin-left: auto;
  }
}

/* En móvil no caben todos: "Iniciar sesión" se va (el CTA lleva a la app, que también tiene ingreso) */
@media (max-width: 520px) {
  .link-login {
    display: none;
  }
}

.brand-mark {
  display: none;
}

@media (max-width: 420px) {
  .logo-svg {
    height: 46px;
  }
  .header-inner {
    gap: 12px;
  }
}

/* Teléfonos muy angostos: solo el símbolo del logo, y el selector sin la flecha */
@media (max-width: 380px) {
  .site-header .logo-svg {
    display: none;
  }
  .site-header .brand-mark {
    display: block;
  }
  .lang-menu summary svg:last-child {
    display: none;
  }
  .header-actions {
    gap: 6px;
  }
  .header-actions .btn-sm {
    padding: 10px 12px;
  }
}

/* ---------- Hero ---------- */
.hero {
  padding: 72px 0 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--brand-orange) 30%, var(--border));
  background: color-mix(in srgb, var(--brand-orange) 8%, var(--surface));
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
}

.eyebrow svg {
  color: var(--brand-orange);
}

.hero h1 {
  margin-top: 20px;
  font-size: clamp(2.2rem, 4.6vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.accent {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  margin-top: 20px;
  max-width: 56ch;
  color: var(--muted);
  font-size: 1.125rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.9rem;
}

.note svg {
  color: var(--success);
}

@media (max-width: 960px) {
  .hero {
    padding-top: 48px;
  }
  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
  }
}

/* ---------- Vista ilustrativa del producto ---------- */
.mock {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface-glass);
  box-shadow: var(--highlight), var(--shadow-float);
  overflow: hidden;
}

.mock-bar {
  display: flex;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.mock-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-strong);
}

.mock-body {
  display: grid;
  gap: 16px;
  padding: 20px;
}

.mock-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mock-row div,
.mock-campaign div {
  display: grid;
  min-width: 0;
}

.mock small {
  color: var(--muted);
  font-size: 0.8rem;
}

.mock-logo {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: none;
  border-radius: 12px;
  background: #9a3412;
  color: #fff7ed;
  font: 700 1.2rem var(--font-heading);
}

.swatches {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

.swatches i {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.sw-1 {
  background: #9a3412;
}
.sw-2 {
  background: #fbbf24;
}
.sw-3 {
  background: #1f2937;
}
.sw-4 {
  background: #fff7ed;
}

.mock-label {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.ads {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

/* Piezas de ejemplo de una panadería ficticia: degradados, sin fotos ni marcas reales */
.ad {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 8px;
  aspect-ratio: 4 / 5;
  padding: 12px;
  border-radius: 10px;
  color: #fff7ed;
  overflow: hidden;
}

.ad strong {
  font: 700 0.85rem/1.2 var(--font-heading);
}

.ad-1 {
  background: radial-gradient(circle at 70% 25%, #fbbf24 0 18%, transparent 19%), linear-gradient(160deg, #b45309, #7c2d12);
}

.ad-2 {
  background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.35)), linear-gradient(135deg, #9a3412, #1f2937);
}

.ad-3 {
  background: repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.06) 0 10px, transparent 10px 20px), linear-gradient(160deg, #1f2937, #0f172a);
}

.ad-mark {
  position: absolute;
  top: 10px;
  left: 10px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff7ed;
}

.ad-cta {
  align-self: flex-start;
  padding: 4px 10px;
  border-radius: 999px;
  background: #fbbf24;
  color: #1f2937;
  font-size: 0.7rem;
  font-weight: 700;
}

.mock-campaign {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}

.mock-approve {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: none;
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--cta-gradient);
  color: var(--cta-text);
  font-size: 0.85rem;
  font-weight: 600;
}

/* ---------- Secciones ---------- */
.section {
  padding: 72px 0;
}

.section-tint {
  background: var(--tint);
  border-block: 1px solid var(--border);
}

.section-head {
  display: grid;
  gap: 12px;
  max-width: 680px;
  margin-bottom: 40px;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section-head p {
  color: var(--muted);
  font-size: 1.1rem;
}

.card {
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface-glass);
  box-shadow: var(--highlight), var(--shadow-card);
}

.card h3 {
  margin-top: 16px;
  font-size: 1.15rem;
  font-weight: 600;
}

.card p {
  margin-top: 8px;
  color: var(--muted);
}

.card-icon {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  color: var(--primary);
}

.steps,
.grid-3,
.grid-2 {
  display: grid;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (max-width: 1000px) {
  .steps,
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .section {
    padding: 56px 0;
  }
  .steps,
  .grid-3,
  .grid-2 {
    grid-template-columns: minmax(0, 1fr);
  }
}

.step {
  position: relative;
}

.step-num {
  position: absolute;
  top: 20px;
  right: 20px;
  color: var(--muted);
  font: 700 0.9rem var(--font-heading);
}

/* ---------- Preguntas ---------- */
.faq {
  display: grid;
  gap: 12px;
}

.faq details {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface-glass);
  box-shadow: var(--highlight);
}

.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 56px;
  padding: 14px 20px;
  font: 600 1.05rem var(--font-heading);
  cursor: pointer;
  list-style: none;
}

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

.faq summary svg {
  flex: none;
  color: var(--muted);
  transition: transform var(--transition);
}

.faq details[open] summary svg {
  transform: rotate(180deg);
}

.faq details p {
  padding: 0 20px 18px;
  color: var(--muted);
}

/* ---------- Cierre ---------- */
.final {
  display: grid;
  justify-items: center;
  gap: 12px;
  padding: 56px 24px;
  text-align: center;
  border-image: none;
  background:
    radial-gradient(30rem 16rem at 50% 0%, var(--glow-orange), transparent 70%),
    var(--surface-glass);
}

.final h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
}

.final p {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

/* ---------- Páginas legales ---------- */
.legal {
  padding: 56px 0 72px;
}

.legal article {
  max-width: 72ch;
  margin-inline: auto;
}

.legal-head {
  display: grid;
  gap: 8px;
  margin-bottom: 28px;
}

.legal h1 {
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 700;
}

.legal h2 {
  margin: 40px 0 12px;
  font-size: 1.35rem;
  font-weight: 600;
}

.legal p,
.legal li {
  color: var(--text);
}

.legal p + p {
  margin-top: 14px;
}

.legal ul,
.legal ol {
  display: grid;
  gap: 8px;
  margin: 14px 0;
  padding-left: 24px;
}

.toc {
  margin-top: 28px;
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface-glass);
}

.toc h2 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.toc ol {
  margin: 0;
  gap: 4px;
}

/* ---------- 404 ---------- */
.not-found {
  display: grid;
  justify-items: start;
  gap: 16px;
  padding: 96px 0;
}

/* ---------- Pie ---------- */
.site-footer {
  margin-top: 24px;
  padding: 48px 0 32px;
  border-top: 1px solid var(--border);
  background: var(--surface-glass);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr));
  gap: 32px;
}

.footer-brand p {
  margin-top: 12px;
  max-width: 32ch;
  color: var(--muted);
}

.site-footer h2 {
  margin-bottom: 12px;
  color: var(--muted);
  font: 600 0.8rem var(--font-body);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-footer ul {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer li a,
.site-footer li span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  color: var(--text);
  text-decoration: none;
}

.site-footer li a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.site-footer li span[aria-current] {
  color: var(--muted);
}

.footer-legal {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.875rem;
}

@media (max-width: 800px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 420px) {
  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}