/* ==========================================================================
   CASASYA — Design System / main.css
   Marca CASASYA — paleta tomada del isotipo (azul cielo / azul marca / navy)
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* Color — derivada del logo: navy #0B1440, azul marca #4475BB, celeste #93CBDE */
  --ink: #0b1440;
  --ink-soft: #3c4874;
  --paper: #f7fafc;
  --paper-dim: #e9f0f5;
  --clay: #4475bb;
  --clay-dark: #2c5490;
  --clay-light: #93cbde;
  --sand: #e1ebf2;
  --sand-line: #c5d8e3;
  --moss: #2f8f76;
  --moss-dark: #1f6b57;
  --line: rgba(11, 20, 64, 0.12);
  --line-strong: rgba(11, 20, 64, 0.22);
  --white: #ffffff;
  --shadow-color: 11 20 64;

  /* Type */
  --font-display: Georgia, "Iowan Old Style", "Palatino Linotype", "Times New Roman", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --step--1: clamp(0.8rem, 0.78rem + 0.1vw, 0.875rem);
  --step-0: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  --step-1: clamp(1.2rem, 1.1rem + 0.5vw, 1.5rem);
  --step-2: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --step-3: clamp(2rem, 1.6rem + 2vw, 2.75rem);
  --step-4: clamp(2.6rem, 2rem + 3vw, 4rem);
  --step-5: clamp(3.2rem, 2.2rem + 5vw, 5.75rem);

  /* Space (8pt-ish fluid scale) */
  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-s: 1rem;
  --space-m: 1.5rem;
  --space-l: 2.5rem;
  --space-xl: clamp(3rem, 2.4rem + 3vw, 5rem);
  --space-2xl: clamp(4.5rem, 3.4rem + 5.5vw, 8rem);
  --space-3xl: clamp(6rem, 4.5rem + 7.5vw, 11rem);

  /* Layout */
  --container-max: 1320px;
  --container-pad: clamp(1.25rem, 1rem + 2vw, 3.5rem);
  --radius-s: 4px;
  --radius-m: 10px;
  --radius-l: 22px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 180ms;
  --dur-med: 420ms;
  --dur-slow: 800ms;

  color-scheme: light;
}

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

* { margin: 0; }

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  min-height: 100svh;
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img, picture, video, canvas, svg { display: block; max-width: 100%; }
img { height: auto; }

input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }

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

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

p { text-wrap: pretty; }

::selection { background: var(--clay); color: var(--paper); }

:focus-visible {
  outline: 2px solid var(--clay-dark);
  outline-offset: 3px;
}

/* ---------- Layout Primitives ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--space-2xl);
}

.section--tight { padding-block: var(--space-xl); }

.section--ink {
  background: var(--ink);
  color: var(--paper-dim);
}

.section--sand { background: var(--sand); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--clay-dark);
}

.section--ink .eyebrow { color: var(--clay-light); }

.eyebrow::before {
  content: "";
  display: block;
  width: 28px;
  height: 1px;
  background: currentColor;
}

.heading-xl { font-size: var(--step-5); }
.heading-l { font-size: var(--step-4); }
.heading-m { font-size: var(--step-3); }
.heading-s { font-size: var(--step-2); }

.lede {
  font-size: var(--step-1);
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: 46ch;
}

.section--ink .lede { color: rgba(247, 250, 252, 0.72); }

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

/* ---------- Buttons ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  padding: 0.95em 1.7em;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform var(--dur-fast) var(--ease-out), background var(--dur-fast), color var(--dur-fast), border-color var(--dur-fast);
  white-space: nowrap;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--clay);
  color: var(--paper);
}
.btn-primary:hover { background: var(--clay-dark); }

.btn-ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--ink); background: var(--ink); color: var(--paper); }

.section--ink .btn-ghost { border-color: rgba(247,250,252,0.35); color: var(--paper); }
.section--ink .btn-ghost:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }

.btn-icon {
  width: 1.1em;
  height: 1.1em;
  flex-shrink: 0;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  padding-block: var(--space-m);
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  transition: transform var(--dur-med) var(--ease-out), background var(--dur-fast) var(--ease-out), backdrop-filter var(--dur-fast) var(--ease-out), -webkit-backdrop-filter var(--dur-fast) var(--ease-out), padding var(--dur-med), box-shadow var(--dur-fast) var(--ease-out);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-m);
}

.site-header--scrolled {
  padding-block: var(--space-xs);
  background: linear-gradient(180deg, rgba(247, 250, 252, 0.68), rgba(247, 250, 252, 0.42));
  backdrop-filter: blur(28px) saturate(2.1);
  -webkit-backdrop-filter: blur(28px) saturate(2.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.75), 0 1px 0 var(--line-strong), 0 12px 40px -16px rgba(var(--shadow-color) / 0.35);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .site-header--scrolled { background: rgba(247, 250, 252, 0.96); }
}

.site-header--hidden { transform: translateY(-100%); }

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  font-family: var(--font-display);
  font-size: var(--step-1);
  letter-spacing: 0.02em;
}

.brand img { height: 34px; width: auto; }

.nav-desktop {
  display: none;
}

@media (min-width: 900px) {
  .nav-desktop {
    display: flex;
    align-items: center;
    gap: var(--space-l);
  }
}

.nav-desktop a {
  position: relative;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding-block: var(--space-3xs);
}

.nav-desktop a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -2px;
  height: 1.5px;
  background: var(--clay);
  transition: right var(--dur-fast) var(--ease-out);
}

.nav-desktop a:hover::after,
.nav-desktop a[aria-current="page"]::after { right: 0; }

.nav-item-dropdown { position: relative; }

.dropdown-panel {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 220px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  box-shadow: 0 18px 40px -12px rgba(var(--shadow-color) / 0.28);
  padding: var(--space-2xs);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}

.nav-item-dropdown:hover .dropdown-panel,
.nav-item-dropdown:focus-within .dropdown-panel {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown-panel a {
  display: block;
  padding: var(--space-2xs) var(--space-s);
  border-radius: var(--radius-s);
  font-size: var(--step--1);
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
}

.dropdown-panel a::after { display: none; }
.dropdown-panel a:hover { background: var(--sand); color: var(--clay-dark); }

.header-cta { display: none; }
@media (min-width: 900px) { .header-cta { display: inline-flex; } }

.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--line-strong);
}
@media (min-width: 900px) { .menu-toggle { display: none; } }

.menu-toggle svg { width: 20px; height: 20px; }
.menu-toggle .icon-close { display: none; }
.menu-toggle[aria-expanded="true"] .icon-open { display: none; }
.menu-toggle[aria-expanded="true"] .icon-close { display: block; }

/* Mobile nav overlay */
.nav-mobile {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--ink);
  color: var(--paper);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-xl) var(--container-pad);
  transform: translateY(-100%);
  transition: transform var(--dur-med) var(--ease-out);
}

.nav-mobile[data-open="true"] { transform: translateY(0); }

.nav-mobile ul { display: flex; flex-direction: column; gap: var(--space-s); }

.nav-mobile a {
  font-family: var(--font-display);
  font-size: var(--step-3);
}

.nav-mobile .submenu {
  padding-left: var(--space-m);
  padding-top: var(--space-2xs);
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
}

.nav-mobile .submenu a { font-family: var(--font-body); font-size: var(--step-0); opacity: 0.75; }

.nav-mobile-footer {
  margin-top: var(--space-l);
  display: flex;
  gap: var(--space-m);
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

@media (min-width: 900px) { .nav-mobile { display: none; } }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: var(--paper-dim);
  padding-block: var(--space-2xl) var(--space-l);
}

.footer-grid {
  display: grid;
  gap: var(--space-l);
  grid-template-columns: 1fr;
}

@media (min-width: 760px) {
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: var(--space-l); }
}

.footer-brand img { height: 30px; margin-bottom: var(--space-s); filter: brightness(0) invert(1); }
.footer-brand p { color: rgba(247,250,252,0.6); max-width: 32ch; }

.footer-col h3 {
  font-family: var(--font-body);
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clay-light);
  margin-bottom: var(--space-s);
}

.footer-col ul { display: flex; flex-direction: column; gap: var(--space-2xs); }
.footer-col a, .footer-col address { color: rgba(247,250,252,0.75); font-style: normal; }
.footer-col a:hover { color: var(--paper); }

.footer-social { display: flex; gap: var(--space-s); margin-top: var(--space-s); }
.footer-social a {
  width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid rgba(247,250,252,0.25);
  border-radius: 50%;
}
.footer-social a:hover { background: var(--clay); border-color: var(--clay); }
.footer-social svg { width: 17px; height: 17px; }

.footer-bottom {
  margin-top: var(--space-2xl);
  padding-top: var(--space-m);
  border-top: 1px solid rgba(247,250,252,0.12);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-s);
  justify-content: space-between;
  font-size: var(--step--1);
  color: rgba(247,250,252,0.55);
}

.footer-bottom ul { display: flex; gap: var(--space-m); }
.footer-credit a:hover { color: var(--paper); }

/* ---------- Scroll reveal ----------
   Progressive enhancement: content is visible by default. The hidden/animated
   state only applies once .js-reveal is set on <html> (reveal.js confirms
   IntersectionObserver is available and observers are attached), so a slow,
   blocked or failed script never leaves real content invisible. */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 900ms var(--ease-out), transform 900ms var(--ease-out);
}
.js-reveal [data-reveal].is-visible { opacity: 1; transform: translateY(0); }
.js-reveal [data-reveal="fade"] { transform: none; }
[data-reveal-delay="1"] { transition-delay: 90ms; }
[data-reveal-delay="2"] { transition-delay: 180ms; }
[data-reveal-delay="3"] { transition-delay: 270ms; }
[data-reveal-delay="4"] { transition-delay: 360ms; }

@media (prefers-reduced-motion: reduce) {
  .js-reveal [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ---------- Scroll progress bar ---------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: var(--clay);
  z-index: 200;
  transition: width 80ms linear;
}

/* ---------- WhatsApp float ---------- */
.float-whatsapp {
  position: fixed;
  right: var(--space-m);
  bottom: var(--space-m);
  z-index: 90;
  width: 58px; height: 58px;
  border-radius: 50%;
  background: var(--moss);
  color: var(--white);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 12px 30px -8px rgba(11,20,64,0.4);
  transition: transform var(--dur-fast) var(--ease-out);
}
.float-whatsapp:hover { transform: scale(1.08); }
.float-whatsapp svg { width: 26px; height: 26px; }

/* ---------- Utility ---------- */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: var(--space-s);
  top: -60px;
  background: var(--ink);
  color: var(--paper);
  padding: var(--space-2xs) var(--space-s);
  border-radius: var(--radius-s);
  z-index: 300;
  transition: top var(--dur-fast);
}
.skip-link:focus { top: var(--space-s); }

.grain-overlay {
  pointer-events: none;
}