/* ==========================================================================
   Cubopanel — hoja de estilos única
   1. Tokens · 2. Base · 3. Primitivas · 4. Componentes
   ========================================================================== */

/* 1. Tokens ---------------------------------------------------------------- */

:root {
  /* Color */
  --c-bg: #0a0a0a;
  --c-surface: #171717;
  --c-line: #171717;
  --c-line-strong: #262626;
  --c-fg: #fafafa;
  --c-fg-soft: #e5e5e5;
  --c-fg-dim: #d4d4d4;
  --c-fg-muted: #a3a3a3;
  --c-fg-subtle: #737373;

  /* Tipografía */
  --font-display: "Montserrat", system-ui, sans-serif;
  --font-sans: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;

  --fs-xs: 12px;
  --fs-sm: 13px;
  --fs-md: 15px;
  --fs-base: 17px;
  --fs-lead: clamp(18px, 1.6vw, 21px);
  --fs-h2: clamp(26px, 3.4vw, 44px);
  --fs-h3: clamp(20px, 2vw, 24px);
  --fs-h1: clamp(44px, 7.6vw, 96px);

  --lh-tight: 1.1;
  --lh-snug: 1.3;
  --lh-normal: 1.55;
  --lh-relaxed: 1.65;

  --ls-h1: -0.045em;
  --ls-h2: -0.035em;
  --ls-h3: -0.02em;
  --ls-brand: -0.01em;

  /* Espaciado */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-7: 28px;
  --sp-8: 40px;
  --sp-9: 56px;

  --gutter: clamp(20px, 5vw, 64px);
  --gutter-bar: clamp(20px, 3vw, 40px);
  --maxw-page: 1280px;
  --maxw-text: 720px;
  --maxw-title: 1100px;

  /* Formas y movimiento */
  --radius-sm: 4px;
  --radius-md: 6px;
  --shadow-pop: 0 20px 40px rgb(0 0 0 / 0.5);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --dur: 450ms;
  --dur-fast: 350ms;
}

/* 2. Base ------------------------------------------------------------------ */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--c-bg);
  color: var(--c-fg-soft);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, p { margin: 0; }

a {
  color: var(--c-fg);
  text-decoration: none;
  transition: color var(--dur-fast) ease;
}

svg { display: block; }

::selection {
  background: var(--c-fg);
  color: var(--c-bg);
}

:focus-visible {
  outline: 2px solid var(--c-fg);
  outline-offset: 3px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* 3. Primitivas ------------------------------------------------------------ */

.container {
  width: 100%;
  max-width: var(--maxw-page);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.bar {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  padding: var(--sp-5) var(--gutter-bar);
}

.stack {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.u-prose {
  max-width: var(--maxw-text);
  color: var(--c-fg-muted);
  font-weight: 300;
  line-height: var(--lh-relaxed);
  text-wrap: balance;
}

.u-link {
  font-size: var(--fs-md);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 6px;
  text-decoration-thickness: 1px;
}

.u-link:hover,
.u-link:focus-visible { color: var(--c-fg-muted); }

.u-reset-btn {
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  font: inherit;
  color: inherit;
  cursor: pointer;
}

.u-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* 4. Componentes ----------------------------------------------------------- */

/* 4.1 Cabecera y marca */

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgb(10 10 10 / 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-line);
}

.header__bar { justify-content: space-between; }

.brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.brand__name {
  font-size: var(--fs-base);
  font-weight: 500;
  letter-spacing: var(--ls-brand);
}

.brand__mark { fill: currentColor; }

/* 4.2 Menú de contacto */

.menu { position: relative; }

.menu__trigger { font-size: 14px; }

.menu__trigger:hover { color: var(--c-fg-muted); }

.menu__panel {
  position: absolute;
  right: 0;
  top: calc(100% + var(--sp-4));
  z-index: 2;
  min-width: 260px;
  display: flex;
  flex-direction: column;
  padding: var(--sp-2);
  background: var(--c-surface);
  border: 1px solid var(--c-line-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-pop);
}

.js .menu__panel[hidden],
html:not(.js) .menu__panel { display: none; }

.menu__item {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  padding: 14px var(--sp-4);
  border-radius: var(--radius-sm);
}

.menu__item:hover,
.menu__item:focus-visible { background: var(--c-line-strong); }

.menu__label {
  font-size: var(--fs-xs);
  color: var(--c-fg-subtle);
}

.menu__value { font-size: var(--fs-md); }

/* 4.3 Hero */

.hero { padding-block: clamp(96px, 16vh, 180px) clamp(80px, 12vh, 140px); }

.hero__title {
  max-width: var(--maxw-title);
  margin-top: var(--sp-8);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h1);
  line-height: 1;
  letter-spacing: var(--ls-h1);
  color: var(--c-fg);
  text-wrap: balance;
}

.hero__lead {
  margin-top: clamp(48px, 6vw, 72px);
  font-size: var(--fs-lead);
  line-height: var(--lh-normal);
}

/* 4.4 Servicios · acordeón */

.services { padding-bottom: clamp(96px, 12vw, 160px); }

.accordion { border-top: 1px solid var(--c-line-strong); }

.accordion__item { border-bottom: 1px solid var(--c-line-strong); }

.accordion__heading {
  font: inherit;
  letter-spacing: inherit;
}

.accordion__trigger {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 48px;
  align-items: center;
  gap: var(--sp-4);
  padding-block: var(--sp-8);
  color: var(--c-fg);
}

.accordion__trigger:hover { color: var(--c-fg-dim); }

.accordion__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h2);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-h2);
  text-align: left;
}

.accordion__icon {
  justify-self: end;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 300;
}

.accordion__icon::before { content: "+"; }

[aria-expanded="true"] .accordion__icon::before { content: "\2212"; }

html:not(.js) .accordion__icon { display: none; }

.accordion__panel { display: grid; }

.js .accordion__panel {
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows var(--dur) var(--ease), opacity var(--dur-fast) ease;
}

.js .accordion__panel[data-open] {
  grid-template-rows: 1fr;
  opacity: 1;
}

.accordion__clip {
  min-height: 0;
  overflow: hidden;
}

.accordion__body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--sp-6);
  padding-bottom: var(--sp-9);
}

.accordion__lede {
  max-width: var(--maxw-text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h3);
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-h3);
  color: var(--c-fg);
  text-wrap: balance;
}

.accordion__cta { margin-top: var(--sp-3); }

/* 4.5 Pie */

.footer {
  margin-top: auto;
  border-top: 1px solid var(--c-line);
  font-size: var(--fs-sm);
  color: var(--c-fg-subtle);
}

.footer__bar {
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--sp-5);
  padding-block: var(--sp-8);
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-7);
}

.footer a { color: inherit; }

.footer a:hover,
.footer a:focus-visible { color: var(--c-fg); }