/* =========================================================
   Filamento Software — Landing page
   Orden: variables, base, tipografía, utilidades, header,
   secciones, componentes, WhatsApp, footer, accesibilidad,
   responsive.
   ========================================================= */

/* 1. Fuente local (variable) */
@font-face {
  font-family: "Space Grotesk";
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url("../assets/fonts/space-grotesk.woff2") format("woff2");
}

/* 2. Variables de diseño */
:root {
  --color-bg: #10110f;
  --color-surface: #191b18;
  --color-surface-raised: #1f221e;
  --color-text: #f5f5f0;
  --color-text-muted: #b3b6ad;
  --color-accent: #c4f36b;
  --color-accent-strong: #b3ea4f;
  --color-accent-contrast: #10110f;
  --color-cta: #d62489;
  --color-cta-strong: #b81e74;
  --color-cta-contrast: #ffffff;
  --color-whatsapp: #1da851;
  --color-whatsapp-strong: #178f45;
  --color-whatsapp-contrast: #ffffff;
  --color-border: #30332d;
  --color-border-strong: #454a3f;

  --font-body: "Space Grotesk", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --step--1: clamp(0.875rem, 0.84rem + 0.15vw, 0.95rem);
  --step-0: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  --step-1: clamp(1.2rem, 1.08rem + 0.6vw, 1.5rem);
  --step-2: clamp(1.6rem, 1.35rem + 1.2vw, 2.3rem);
  --step-3: clamp(2rem, 1.5rem + 2.4vw, 3.3rem);
  --step-4: clamp(2.5rem, 1.6rem + 4vw, 4.5rem);

  --content-width: 1200px;
  --content-narrow: 720px;
  --page-gutter: clamp(20px, 5vw, 48px);
  --section-space: clamp(72px, 11vw, 150px);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  --border-hairline: 1px solid var(--color-border);
  --shadow-soft: 0 24px 60px -32px rgba(0, 0, 0, 0.85);

  --transition-fast: 160ms ease;
  --transition-base: 240ms ease;

  --z-header: 100;
  --z-fab: 90;
}

/* 3. Reset y base */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100dvh;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--step-0);
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
  padding: 0;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
}

/* 4. Tipografía */
h1,
h2,
h3 {
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

h1,
h2 {
  overflow-wrap: break-word;
}

.text-accent {
  color: var(--color-accent);
}

/* 5. Utilidades de layout */
.container {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

.section {
  padding-block: var(--section-space);
  border-top: var(--border-hairline);
}

.section__head {
  max-width: 46rem;
  margin-bottom: clamp(40px, 6vw, 72px);
}

.section__head--split {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  max-width: none;
}

.section__title {
  font-size: var(--step-3);
}

.section__note {
  color: var(--color-text-muted);
  font-size: var(--step-0);
  max-width: 32rem;
}

.section__note--wide {
  max-width: 40rem;
  margin-top: 20px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  color: var(--color-accent);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--color-accent);
}

/* 6. Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: var(--step-0);
  font-weight: 500;
  letter-spacing: -0.01em;
  text-align: center;
  transition: background-color var(--transition-fast), border-color var(--transition-fast),
    color var(--transition-fast), transform var(--transition-fast);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--color-cta);
  color: var(--color-cta-contrast);
}

.btn--primary:hover {
  background: var(--color-cta-strong);
}

.btn--ghost {
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--large {
  min-height: 54px;
  padding: 15px 34px;
  font-size: var(--step-1);
}

/* 7. Encabezado y navegación */
.skip-link {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translate(-50%, -200%);
  z-index: 200;
  padding: 10px 18px;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: transform var(--transition-fast);
}

.skip-link:focus {
  transform: translate(-50%, 0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  border-bottom: var(--border-hairline);
  backdrop-filter: blur(12px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand__mark {
  width: 34px;
  height: 34px;
  flex: none;
}

.brand__name {
  display: inline-flex;
  align-items: baseline;
  color: var(--color-text);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.brand__suffix {
  color: var(--color-text-muted);
  font-weight: 400;
}

.brand__suffix::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin: 0 6px 2px;
  border-radius: 50%;
  background: var(--color-accent);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.nav-toggle__box {
  position: relative;
  display: block;
  width: 20px;
  height: 14px;
}

.nav-toggle__bar {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--color-text);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle__bar:nth-child(1) {
  top: 0;
}

.nav-toggle__bar:nth-child(2) {
  bottom: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  transform: translateY(-6px) rotate(-45deg);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav__list a {
  display: inline-block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: var(--step-0);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-nav__list a:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

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

/* 8. Hero */
.hero {
  padding-block: clamp(56px, 9vw, 120px) var(--section-space);
  overflow: hidden;
}

.hero__inner {
  display: grid;
  gap: clamp(48px, 7vw, 80px);
}

.hero__title {
  font-size: var(--step-4);
  max-width: 15ch;
}

.hero__lead {
  max-width: 46ch;
  margin-top: 26px;
  color: var(--color-text-muted);
  font-size: var(--step-1);
  line-height: 1.5;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.hero__visual {
  position: relative;
}

.hero-diagram {
  width: 100%;
  height: auto;
  border: var(--border-hairline);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
}

.hero-diagram__grid {
  opacity: 0.55;
}

.hero-diagram__flow {
  stroke-dasharray: 8 10;
  animation: flow 22s linear infinite;
}

@keyframes flow {
  to {
    stroke-dashoffset: -360;
  }
}

/* 9. Enfoque */
.enfoque__grid {
  display: grid;
  gap: clamp(32px, 5vw, 72px);
}

.enfoque__lead {
  font-size: var(--step-2);
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -0.02em;
  max-width: 30ch;
}

.principles {
  display: grid;
  gap: 28px;
}

.principles__item {
  padding-top: 22px;
  border-top: var(--border-hairline);
}

.principles__title {
  font-size: var(--step-1);
  margin-bottom: 8px;
}

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

/* 10. Paquetes */
.packages {
  display: grid;
  gap: clamp(20px, 3vw, 28px);
}

.package {
  display: flex;
  flex-direction: column;
  padding: clamp(26px, 4vw, 40px);
  border: var(--border-hairline);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.package--featured {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-soft);
}

.package__tag {
  margin-bottom: 14px;
  color: var(--color-text-muted);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.package--featured .package__tag {
  color: var(--color-accent);
}

.package__price {
  margin-bottom: 18px;
  font-size: var(--step-3);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
}

.package__price small {
  margin-left: 6px;
  color: var(--color-text-muted);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.package--featured .package__price {
  color: var(--color-accent);
}

.package__title {
  font-size: var(--step-2);
  margin-bottom: 12px;
}

.package__desc {
  color: var(--color-text-muted);
  max-width: 46ch;
}

.package__list {
  display: grid;
  gap: 12px;
  margin: 26px 0 32px;
}

.package__list li {
  position: relative;
  padding-left: 28px;
}

.package__list li::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 0.5em;
  width: 12px;
  height: 7px;
  border-left: 2px solid var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  transform: rotate(-45deg);
}

.package__cta {
  width: 100%;
  margin-top: auto;
}

/* 11. Proceso */
.process {
  display: grid;
  gap: 1px;
  border: var(--border-hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-border);
}

.process__step {
  padding: clamp(28px, 4vw, 44px);
  background: var(--color-bg);
}

.process__num {
  display: block;
  margin-bottom: 20px;
  color: var(--color-accent);
  font-size: var(--step-2);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
}

.process__title {
  font-size: var(--step-1);
  margin-bottom: 10px;
}

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

/* 12. Diferenciales */
.statements {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.statements__item {
  padding-left: clamp(24px, 4vw, 40px);
  border-left: 2px solid var(--color-border);
  transition: border-color var(--transition-base);
}

.statements__item:hover {
  border-color: var(--color-accent);
}

.statements__text {
  font-size: var(--step-2);
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: -0.02em;
  max-width: 34ch;
}

/* 13. Contacto */
.section--contacto {
  border-top: none;
}

.contact {
  padding: clamp(40px, 7vw, 88px) clamp(24px, 5vw, 68px);
  border: var(--border-hairline);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
}

.contact__title {
  font-size: var(--step-3);
  max-width: 18ch;
}

.contact__text {
  max-width: 46ch;
  margin: 24px 0 36px;
  color: var(--color-text-muted);
  font-size: var(--step-1);
  line-height: 1.5;
}

.contact__hint {
  margin-top: 18px;
  color: var(--color-text-muted);
  font-size: var(--step--1);
}

/* 14. Botón flotante de WhatsApp */
.whatsapp-fab {
  position: fixed;
  right: clamp(16px, 4vw, 32px);
  bottom: calc(clamp(16px, 4vw, 32px) + env(safe-area-inset-bottom));
  z-index: var(--z-fab);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-whatsapp);
  color: var(--color-whatsapp-contrast);
  box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.7);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.whatsapp-fab:hover {
  background: var(--color-whatsapp-strong);
  transform: translateY(-3px);
}

.whatsapp-fab svg {
  width: 30px;
  height: 30px;
  fill: currentColor;
}

/* 15. Pie de página */
.site-footer {
  padding-top: clamp(56px, 8vw, 96px);
  border-top: var(--border-hairline);
}

.site-footer__inner {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
  padding-bottom: clamp(40px, 6vw, 64px);
}

.site-footer__desc {
  max-width: 34ch;
  margin-top: 18px;
  color: var(--color-text-muted);
}

.site-footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.site-footer__nav a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.site-footer__nav a:hover {
  color: var(--color-accent);
}

.site-footer__legal {
  padding-block: 24px;
  border-top: var(--border-hairline);
}

.site-footer__legal p {
  color: var(--color-text-muted);
  font-size: var(--step--1);
}

/* 16. Responsive */
@media (min-width: 720px) {
  .hero__inner {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }

  .enfoque__grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

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

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

  .site-footer__inner {
    grid-template-columns: 1.4fr 1fr auto;
    align-items: start;
  }

  .site-footer__contact {
    justify-self: end;
  }
}

@media (min-width: 960px) {
  .process {
    grid-template-columns: repeat(4, 1fr);
  }

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

/* Navegación móvil */
@media (max-width: 819px) {
  html {
    scroll-padding-top: 84px;
  }

  .js .nav-toggle {
    display: inline-flex;
  }

  .js .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: var(--page-gutter);
    left: var(--page-gutter);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    background: var(--color-surface);
    border: var(--border-hairline);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  }

  .js .site-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__list a {
    padding: 14px 16px;
    font-size: var(--step-1);
  }

  .site-nav__cta {
    margin-top: 12px;
    width: 100%;
  }

  .no-js .site-header__inner {
    flex-wrap: wrap;
    padding-block: 12px;
  }

  .no-js .site-nav {
    flex: 1 1 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .no-js .site-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

/* 17. Página 404 */
.error-page {
  display: grid;
  place-items: center;
  min-height: calc(100dvh - 72px);
  padding-block: var(--section-space);
  text-align: center;
}

.error-page__inner {
  max-width: 42rem;
}

.error-page__code {
  display: block;
  color: var(--color-accent);
  font-size: clamp(4rem, 18vw, 9rem);
  font-weight: 600;
  line-height: 0.9;
  letter-spacing: -0.04em;
}

.error-page__title {
  margin-top: 20px;
  font-size: var(--step-3);
}

.error-page__text {
  margin-top: 16px;
  color: var(--color-text-muted);
  font-size: var(--step-1);
  line-height: 1.5;
}

.error-page__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 32px;
}

/* 18. Accesibilidad y preferencias */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .hero-diagram__flow {
    animation: none;
  }

  .btn:hover,
  .whatsapp-fab:hover {
    transform: none;
  }
}