/* ============================================================
   DSAYN Apps Hub — escaparate público
   Paleta canónica DSAYN. Antracita = identidad; azul acción = CTA;
   gradiente data (#0066ff→#00d2ff) SOLO en narrativa de datos.
   ============================================================ */

:root {
  /* Antracita — identidad, hero, nav, footer */
  --brand-anthracite:      #1F2937;
  --brand-anthracite-deep: #111827;
  --brand-anthracite-soft: #374151;

  /* Azul acción — CTAs, links, focus */
  --action-blue:       #2563eb;
  --action-blue-hover: #1d4fd8;

  /* Azul/cyan data — SOLO narrativa de datos */
  --data-blue:    #0066ff;
  --data-cyan:    #00d2ff;
  --data-gradient:      linear-gradient(135deg, #0066ff 0%, #00d2ff 100%);
  --data-gradient-dark: linear-gradient(135deg, #001a4d 0%, #0044cc 100%);

  /* Neutros */
  --color-ink:        #06070A;
  --color-text:       #1d1d1f;
  --color-text-soft:  #424245;
  --color-muted:      #6e6e73;
  --color-line:       #d2d2d7;
  --color-line-soft:  #e8e8ed;
  --color-bg:         #ffffff;
  --color-bg-soft:    #fbfbfd;
  --color-bg-cream:   #f5f5f7;

  /* Tipografía */
  --font-display: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
  --font-body:    "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;

  --fs-xs:  0.8125rem;
  --fs-sm:  0.9375rem;
  --fs-base:1.0625rem;
  --fs-md:  1.25rem;
  --fs-lg:  1.5rem;
  --fs-xl:  clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --fs-2xl: clamp(2rem, 1.5rem + 2.5vw, 3.25rem);
  --fs-3xl: clamp(2.5rem, 1.8rem + 3.5vw, 4.25rem);
  --fs-4xl: clamp(2.75rem, 1.9rem + 4.2vw, 5rem);

  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  --radius-sm: 8px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 12px 32px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 32px 64px rgba(15, 23, 42, 0.12);
  --shadow-blue: 0 24px 48px rgba(37, 99, 235, 0.22);

  --container: 920px;
  --container-narrow: 920px;
  --transition: 320ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ============= Reset ============= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  overflow-wrap: break-word;
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: var(--action-blue); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--action-blue-hover); }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.025em; line-height: 1.1; }
:focus-visible { outline: 3px solid var(--action-blue); outline-offset: 3px; border-radius: 4px; }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 20px; }
.container-narrow { max-width: var(--container-narrow); }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--action-blue); color: #fff; padding: var(--space-3) var(--space-5);
  border-radius: 0 0 var(--radius-sm) 0; font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ============= Botones ============= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-family: var(--font-display); font-weight: 600; font-size: var(--fs-sm);
  padding: 0.85em 1.6em; border-radius: var(--radius-pill); border: 1.5px solid transparent;
  cursor: pointer; transition: transform var(--transition), background var(--transition), box-shadow var(--transition), color var(--transition);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--action-blue); color: #fff; box-shadow: var(--shadow-blue); }
.btn-primary:hover { background: var(--action-blue-hover); color: #fff; }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,0.35); }
.btn-ghost:hover { background: rgba(255,255,255,0.1); color: #fff; }
.btn-dark { background: var(--brand-anthracite); color: #fff; }
.btn-dark:hover { background: var(--brand-anthracite-deep); color: #fff; }
.btn-outline { background: transparent; color: var(--brand-anthracite); border-color: var(--color-line); }
.btn-outline:hover { border-color: var(--action-blue); color: var(--action-blue); }

/* ============= Hero ============= */
.hero {
  position: relative; color: #fff; overflow: hidden;
  background: radial-gradient(120% 120% at 80% 0%, #24324a 0%, var(--brand-anthracite) 45%, var(--brand-anthracite-deep) 100%);
  padding: clamp(2rem, 4vw, 3.25rem) 0 clamp(2.25rem, 4vw, 3.5rem);
}
/* Cabecera armonizada con DSAYN Calculadora: brandlink + acento + etiqueta */
.hero-brand { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.brandlink { color: inherit; text-decoration: none; cursor: pointer; }
.brandlink:hover { opacity: 0.9; }
.hero-wordmark { font-family: var(--font-display); font-size: 22px; font-weight: 800; letter-spacing: -0.01em; color: #fff; }
.hero-logo { height: 30px; width: auto; opacity: 0.95; flex: 0 0 auto; }
.hero-accent { height: 4px; width: 72px; background: var(--data-gradient); border-radius: 2px; margin-bottom: 24px; }
.hero-label { font-size: 11px; font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase; color: var(--data-cyan); margin-bottom: 14px; }
.hero h1 .accent { background: var(--data-gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-claim a { color: inherit; text-decoration: none; }
.hero-claim a:hover { text-decoration: underline; text-underline-offset: 3px; }
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(60% 60% at 15% 100%, rgba(0,102,255,0.22) 0%, transparent 60%);
}
.hero .container { position: relative; z-index: 2; }
.hero h1 {
  font-size: var(--fs-3xl); max-width: 100%; margin-bottom: var(--space-4); text-wrap: balance;
  background: linear-gradient(180deg, #fff 60%, #c7d2e6 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-claim { font-style: italic; color: var(--data-cyan); font-weight: 600; }
.hero-sub { font-size: var(--fs-md); color: #c7d2e6; max-width: 60ch; margin-bottom: var(--space-6); text-wrap: pretty; }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-4); }

/* ============= Secciones ============= */
.section { padding: clamp(3.5rem, 6vw, 6.5rem) 0; }
.section-soft { background: var(--color-bg-soft); }
.section-cream { background: var(--color-bg-cream); }
.section-dark { background: var(--brand-anthracite-deep); color: #fff; }
.section-head { max-width: 62ch; margin-bottom: var(--space-8); }
.eyebrow {
  display: inline-block; font-size: var(--fs-xs); font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--action-blue); margin-bottom: var(--space-3);
}
.section-dark .eyebrow { color: var(--data-cyan); }
.section-head h2 { font-size: var(--fs-2xl); margin-bottom: var(--space-4); }
.section-head p { font-size: var(--fs-md); color: var(--color-muted); text-wrap: pretty; }
.section-dark .section-head p { color: #b9c4d6; }

/* ============= Apps grid ============= */
.apps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
@media (max-width: 720px) { .apps-grid { grid-template-columns: 1fr; } }
.app-card {
  position: relative; cursor: pointer;
  display: flex; flex-direction: column; background: var(--color-bg); border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.app-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--color-line); }

/* Toda la tarjeta clicable (stretched link): el enlace de "Abrir" cubre la card
   entera —bloque visual de arriba y CTA incluidos—. Un solo foco accesible. */
.app-card .app-card-cta a::after { content: ""; position: absolute; inset: 0; z-index: 3; }
.app-card .app-card-visual, .app-card .app-card-body { position: relative; z-index: 0; }
.app-card .app-card-cta a { position: relative; z-index: 3; }

/* Entrada con más movimiento y escalonada (sobre la base .reveal-up) */
.app-card.reveal-up {
  transform: translateY(40px) scale(0.95);
  transition: opacity 0.7s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.app-card:hover .app-card-visual .glyph { transform: scale(1.08) rotate(-4deg); transition: transform var(--transition); }
.app-card-visual {
  position: relative; aspect-ratio: 16 / 9; display: flex; align-items: center; justify-content: center;
  background: var(--data-gradient-dark, linear-gradient(135deg, #001a4d 0%, #0044cc 100%));
  color: #fff; overflow: hidden;
}
.app-card-visual .glyph { font-size: 3.4rem; filter: drop-shadow(0 6px 18px rgba(0,0,0,0.35)); }
.app-card-visual .tag {
  position: absolute; top: var(--space-4); left: var(--space-4);
  font-size: var(--fs-xs); font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase;
  background: rgba(255,255,255,0.14); border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-pill); padding: 0.3em 0.9em; backdrop-filter: blur(4px);
}
.app-card-body { display: flex; flex-direction: column; flex: 1; padding: var(--space-6); }
.app-card-body h3 { font-size: var(--fs-lg); margin-bottom: var(--space-3); }
.app-problem { color: var(--color-text-soft); font-size: var(--fs-sm); margin-bottom: var(--space-5); text-wrap: pretty; }
.app-meta { margin-bottom: var(--space-5); }
.app-meta dt {
  font-size: var(--fs-xs); font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--color-muted); margin-bottom: var(--space-2);
}
.app-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.app-tech span {
  font-size: var(--fs-xs); font-weight: 500; color: var(--brand-anthracite-soft);
  background: var(--color-bg-cream); border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-sm); padding: 0.25em 0.7em;
}
.app-made {
  display: inline-flex; align-items: center; gap: 0.4rem; font-size: var(--fs-xs); font-weight: 600;
  color: var(--action-blue); margin-bottom: var(--space-5);
}
.app-made::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--data-cyan); box-shadow: 0 0 0 3px rgba(0,210,255,0.2); }
.app-card-cta { margin-top: auto; }
.app-card-cta .btn { width: 100%; }

/* Acentos de color por app en la cabecera visual */
.app-card--meteo .app-card-visual { background: linear-gradient(135deg, #0a3d91 0%, #00a6d6 100%); }
.app-card--calc  .app-card-visual { background: linear-gradient(135deg, #063a2f 0%, #0e9e6e 100%); }
.app-card--tesla .app-card-visual { background: linear-gradient(135deg, #3a0d0d 0%, #b3261e 100%); }

/* ============= Brochure (destacado) ============= */
.brochure-feature {
  position: relative; cursor: pointer;
  display: grid; grid-template-columns: 0.85fr 1.15fr; gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
/* Todo el bloque del brochure clicable (stretched link → descarga del PDF) */
/* Enlace-overlay real: cubre todo el bloque (la imagen lleva transform y crea
   su propio contexto de apilado, por eso el ::after no bastaba). El botón queda
   por encima (z-index mayor) para conservar su hover y foco propios. */
.brochure-stretch { position: absolute; inset: 0; z-index: 1; }
.brochure-copy .btn { position: relative; z-index: 2; }
.brochure-preview { display: flex; justify-content: center; }
.brochure-preview img {
  width: 100%; max-width: 340px; border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg); border: 1px solid var(--color-line-soft);
  transform: rotate(-2deg); transition: transform var(--transition);
}
.brochure-feature:hover .brochure-preview img { transform: rotate(0) translateY(-4px); }
.brochure-copy h2 { font-size: var(--fs-2xl); margin-bottom: var(--space-4); }
.brochure-copy p { font-size: var(--fs-md); color: var(--color-muted); margin-bottom: var(--space-6); text-wrap: pretty; }

/* ============= Formulario / CTA ============= */
.cta-wrap { display: grid; grid-template-columns: 1fr 1.1fr; gap: var(--space-8); align-items: start; }
.cta-copy h2 { font-size: var(--fs-2xl); margin-bottom: var(--space-4); }
.cta-copy p { color: #b9c4d6; font-size: var(--fs-md); margin-bottom: var(--space-5); text-wrap: pretty; }
.cta-ways { list-style: none; display: flex; flex-direction: column; gap: var(--space-4); margin-top: var(--space-6); }
.cta-ways li { display: flex; gap: var(--space-4); align-items: flex-start; font-size: var(--fs-sm); color: #d6deec; }
.cta-ways .k { color: var(--data-cyan); font-weight: 700; }
.emph-no { color: #ff6b6b; font-weight: 800; }

.contact-form { background: var(--color-bg); border-radius: var(--radius-lg); padding: clamp(1.75rem, 3vw, 2.75rem); box-shadow: var(--shadow-lg); }
.field { margin-bottom: var(--space-5); }
.field label { display: block; font-size: var(--fs-xs); font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--brand-anthracite-soft); margin-bottom: var(--space-2); }
.field input, .field select, .field textarea {
  width: 100%; font-family: var(--font-body); font-size: var(--fs-base); color: var(--color-text);
  background: var(--color-bg-soft); border: 1.5px solid var(--color-line); border-radius: var(--radius-sm);
  padding: 0.75em 0.9em; transition: border-color var(--transition), background var(--transition);
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--action-blue); background: #fff; outline: none; }
.field textarea { min-height: 120px; resize: vertical; }
.field-check { display: flex; gap: var(--space-3); align-items: flex-start; }
.field-check input { width: auto; margin-top: 4px; }
.field-check label { text-transform: none; letter-spacing: normal; font-weight: 400; color: var(--color-muted); font-size: var(--fs-xs); margin-bottom: 0; }
.form-note { font-size: var(--fs-xs); color: var(--color-muted); margin-top: var(--space-4); }

/* ============= Footer (armonizado con dsayn.com) ============= */
.site-footer { background: var(--brand-anthracite-deep); color: rgba(245,245,247,0.7); padding-block: var(--space-8) var(--space-5); }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-6); margin-bottom: var(--space-7); }
@media (min-width: 720px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-7); } }
.footer-brand img { height: 48px; width: auto; margin-bottom: var(--space-5); }
.footer-brand p { font-size: var(--fs-sm); max-width: 36ch; }
.site-footer h4 { color: #fff; font-size: var(--fs-xs); font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: var(--space-4); }
.footer-list { list-style: none; }
.footer-list li { margin-bottom: var(--space-2); }
.footer-list a { color: rgba(245,245,247,0.7); font-size: var(--fs-sm); }
.footer-list a:hover { color: var(--data-cyan); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08); padding-top: var(--space-5);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-4);
  font-size: var(--fs-xs); color: rgba(245,245,247,0.5);
}
.footer-bottom a { color: rgba(245,245,247,0.5); }
.footer-bottom a:hover { color: var(--data-cyan); }

/* ============= Animaciones ============= */
.reveal-up { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal-up.is-visible { opacity: 1; transform: none; }
[data-delay="1"] { transition-delay: 0.08s; }
[data-delay="2"] { transition-delay: 0.16s; }
[data-delay="3"] { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal-up { opacity: 1; transform: none; transition: none; }
  .btn:hover, .app-card:hover { transform: none; }
  .brochure-feature:hover .brochure-preview img { transform: rotate(-2deg); }
}

/* ============= Responsive ============= */
@media (max-width: 820px) {
  .brochure-feature { grid-template-columns: 1fr; gap: var(--space-6); text-align: center; }
  .brochure-preview img { max-width: 260px; transform: none; }
  .brochure-copy .btn { width: 100%; }
}
@media (max-width: 900px) {
  .cta-wrap { grid-template-columns: 1fr; gap: var(--space-7); }
}
@media (max-width: 520px) {
  .hero-actions .btn { width: 100%; }
}