/* =============================================================
   styles.css — GB Lleida "The Green Brand"
   Design system mobile-first · WCAG AA · prefers-reduced-motion
   ============================================================= */

/* ── Custom properties ───────────────────────────────────────── */
:root {
  /* Colores de marca */
  --c-primary:   #019A7C;
  --c-primary-d: #017D65;
  --c-primary-l: #01B894;
  --c-accent:    #D4A853;   /* dorado — acento puntual */
  --c-dark:      #151B20;
  --c-dark-2:    #1E262D;
  --c-bg:        #F4F6F7;
  --c-text:      #1D2429;
  --c-muted:     #5B6770;
  --c-slate:     #8A949D;
  --c-white:     #FFFFFF;
  --c-border:    #E2E6E9;
  --wa:          #25D366;   /* SOLO botón WhatsApp */

  /* Espaciado (escala 8px) */
  --space-1:  8px;
  --space-2:  16px;
  --space-3:  24px;
  --space-4:  32px;
  --space-5:  48px;
  --space-6:  64px;
  --space-8:  96px;
  --space-10: 128px;

  /* Layout */
  --container: 1180px;
  --radius:    14px;

  /* Tipografía */
  --font-display: 'Fraunces', Georgia, serif;
  --font-body:    system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
}
body::before { content:""; position:fixed; z-index:-1; inset:0; pointer-events:none; background:radial-gradient(520px circle at var(--pointer-x,50%) var(--pointer-y,15%),rgba(1,154,124,.055),transparent 68%); }
.scroll-progress { position:fixed; top:0; left:0; right:0; height:3px; z-index:200; pointer-events:none; }
.scroll-progress span { display:block; width:100%; height:100%; transform:scaleX(0); transform-origin:left; background:linear-gradient(90deg,var(--c-primary),var(--c-primary-l),var(--c-accent)); box-shadow:0 0 14px rgba(1,184,148,.55); }
body::before { content:""; position:fixed; z-index:-1; inset:0; pointer-events:none; background:radial-gradient(520px circle at var(--pointer-x,50%) var(--pointer-y,15%),rgba(1,154,124,.055),transparent 68%); }
.scroll-progress { position:fixed; top:0; left:0; right:0; height:3px; z-index:200; pointer-events:none; }
.scroll-progress span { display:block; width:100%; height:100%; transform:scaleX(0); transform-origin:left; background:linear-gradient(90deg,var(--c-primary),var(--c-primary-l),var(--c-accent)); box-shadow:0 0 14px rgba(1,184,148,.55); }

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

a { color: var(--c-primary-d); }

/* ── Tipografía ──────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  color: var(--c-dark);
  margin: 0 0 .5em;
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.1rem; }

p { margin: 0 0 1em; }

/* ── Layout: container ───────────────────────────────────────── */
.container {
  width: min(92%, var(--container));
  margin-inline: auto;
}

@media (max-width: 640px) {
  .container { width: 86%; }
}

/* ── Grid util ───────────────────────────────────────────────── */
.grid {
  display: grid;
  gap: var(--space-4);
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }

/* ── Card ────────────────────────────────────────────────────── */
.card {
  background: var(--c-white);
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  overflow: hidden;
  transition: box-shadow .2s, transform .2s;
}
.card:hover {
  box-shadow: 0 8px 28px rgba(1, 154, 124, .12);
  transform: translateY(-3px);
}
.card__body {
  padding: var(--space-3);
}
.card__title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0 0 .4em;
  color: var(--c-dark);
}
.card__text {
  color: var(--c-muted);
  font-size: .95rem;
  margin: 0;
}

/* ── Botones ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: 48px;
  padding: .7rem 1.4rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s, background .2s, border-color .2s;
  min-width: 44px;
}

.btn--wa {
  background: var(--wa);
  color: #fff;
}
.btn--wa:hover {
  background: #1da851;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(37, 211, 102, .35);
  color: #fff;
}

.btn--primary {
  background: var(--c-primary);
  color: #fff;
}
.btn--primary:hover {
  background: var(--c-primary-d);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(1, 154, 124, .3);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  border: 2px solid var(--c-primary);
  color: var(--c-primary-d);
}
.btn--ghost:hover {
  background: var(--c-primary);
  color: #fff;
}

/* ── Focus visible (WCAG AA) ─────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ── Skip link ───────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--c-dark);
  color: #fff;
  padding: .5rem 1rem;
  border-radius: 0 0 var(--radius) var(--radius);
  font-weight: 700;
  z-index: 1000;
  text-decoration: none;
  transition: top .2s;
}
.skip-link:focus { top: 0; }

/* ── Header ──────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--c-white);
  border-bottom: 1px solid var(--c-border);
  box-shadow: 0 1px 8px rgba(21, 27, 32, .06);
}
.site-header.is-scrolled { background:rgba(255,255,255,.9); backdrop-filter:blur(18px) saturate(1.25); box-shadow:0 8px 30px rgba(21,27,32,.09); }
.site-header.is-scrolled .bar { padding-block:.45rem; }
.site-header.is-scrolled { background:rgba(255,255,255,.9); backdrop-filter:blur(18px) saturate(1.25); box-shadow:0 8px 30px rgba(21,27,32,.09); }
.site-header.is-scrolled .bar { padding-block:.45rem; }

.site-header .bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .7rem 0;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}
.logo img {
  height: 48px;
  width: auto;
  display: block;
}

/* ── Nav ─────────────────────────────────────────────────────── */
.nav {
  display: flex;
  gap: 1.2rem;
  align-items: center;
  flex-wrap: wrap;
}

.nav a:not(.btn) {
  text-decoration: none;
  color: var(--c-text);
  font-weight: 500;
  font-size: .95rem;
  padding: .25rem 0;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}
.nav a:not(.btn):hover {
  color: var(--c-primary-d);
  border-bottom-color: var(--c-primary);
}
.nav-group { position: relative; }
.nav-panel { position: absolute; top: calc(100% + .75rem); left: 50%; transform: translate(-50%, 8px); width: 310px; padding: .6rem; border: 1px solid var(--c-border); border-radius: 16px; background: #fff; box-shadow: 0 18px 50px rgba(21,27,32,.14); opacity: 0; visibility: hidden; transition: opacity .18s, transform .18s, visibility .18s; }
.nav-group:hover .nav-panel, .nav-group:focus-within .nav-panel { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.nav-panel::before { content: ""; position: absolute; inset: -.8rem 0 auto; height: .8rem; }
.nav-panel a:not(.btn) { display: block; padding: .7rem .8rem; border: 0; border-radius: 10px; }
.nav-panel a:not(.btn):hover { background: var(--c-bg); border: 0; }
.nav-panel strong, .nav-panel span { display: block; }
.nav-panel strong { color: var(--c-dark); font-size: .9rem; }
.nav-panel span { color: var(--c-muted); font-size: .78rem; font-weight: 400; margin-top: .12rem; }

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: .5rem;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
  color: var(--c-dark);
  font-size: 1.5rem;
  line-height: 1;
  border-radius: var(--radius);
  transition: background .15s;
}
.nav-toggle:hover { background: var(--c-bg); }

/* ── Mobile nav ──────────────────────────────────────────────── */
@media (max-width: 860px) {
  .nav {
    position: fixed;
    inset: 65px 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    background: var(--c-white);
    padding: var(--space-3) var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--c-border);
    box-shadow: 0 4px 24px rgba(21, 27, 32, .1);
    transform: translateY(-110%);
    transition: transform .25s ease;
    gap: .6rem;
    z-index: 49;
  }
  .nav.open {
    transform: translateY(0);
  }
  .nav a:not(.btn) {
    font-size: 1.05rem;
    width: 100%;
    padding: .4rem 0;
  }
  .nav-group { width: 100%; }
  .nav-group > a { display: block; }
  .nav-panel { position: static; width: 100%; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; border-left: 2px solid var(--c-border); border-radius: 0; padding: .1rem 0 .1rem .7rem; margin: .2rem 0 .35rem; }
  .nav-panel a:not(.btn) { padding: .35rem .6rem; }
  .nav-panel span { display: none; }
  .nav .btn {
    width: 100%;
    justify-content: center;
    margin-top: .4rem;
  }
  .nav-toggle {
    display: inline-flex;
  }
}

/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: min(80vh, 600px);
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--c-dark);
}
.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(21, 27, 32, .78) 0%,
    rgba(1, 154, 124, .35) 100%
  );
}
.hero-content {
  position: relative;
  z-index: 2;
  color: #fff;
  padding: var(--space-6) 0;
  max-width: 640px;
}
.hero-content h1 {
  color: #fff;
  margin-bottom: var(--space-2);
}
.hero-content p {
  font-size: 1.15rem;
  opacity: .9;
  margin-bottom: var(--space-4);
}

/* ── Parallax section ────────────────────────────────────────── */
.parallax-section {
  position: relative;
  padding: var(--space-8) 0;
  overflow: hidden;
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
}
@media (max-width: 767px) {
  .parallax-section {
    background-attachment: scroll;
  }
}
.parallax-overlay {
  position: absolute;
  inset: 0;
  background: rgba(21, 27, 32, .72);
}
.parallax-content {
  position: relative;
  z-index: 2;
  color: #fff;
  text-align: center;
}
.parallax-content h2 { color: #fff; }

/* ── Secciones ───────────────────────────────────────────────── */
.section { padding: var(--space-6) 0; }
.section--mist  { background: var(--c-bg); }
.section--white { background: var(--c-white); }
.section--dark  { background: var(--c-dark); color: #cfe0d4; }
.section--dark h2, .section--dark h3 { color: #fff; }
.section--teal  { background: var(--c-primary); color: #fff; }
.section--teal h2, .section--teal h3 { color: #fff; }

/* ── Footer ──────────────────────────────────────────────────── */
.site-footer {
  background: var(--c-dark);
  color: #CFE0D4;
  margin-top: var(--space-8);
  padding: var(--space-6) 0 var(--space-3);
}
.site-footer a {
  color: #CFE0D4;
  text-decoration: none;
  transition: color .15s;
}
.site-footer a:hover {
  color: var(--c-primary-l);
  text-decoration: underline;
}
.site-footer strong {
  color: #fff;
  display: block;
  margin-bottom: var(--space-1);
  font-size: .9rem;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}
.footer-grid p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
}
.footer-bottom {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid rgba(255, 255, 255, .1);
  font-size: .82rem;
  opacity: .65;
}

/* ── Animación reveal ────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .5s ease, transform .5s ease;
}
.reveal:nth-child(2n) { transition-delay:.04s; }.reveal:nth-child(3n) { transition-delay:.08s; }.reveal:nth-child(4n) { transition-delay:.12s; }
.reveal.in {
  opacity: 1;
  transform: none;
}
.reveal:nth-child(2n) { transition-delay:.04s; }.reveal:nth-child(3n) { transition-delay:.08s; }.reveal:nth-child(4n) { transition-delay:.12s; }

/* ── Botón flotante WhatsApp (mobile) ────────────────────────── */
.wa-float {
  display: none;
}

/* Volver arriba */
.back-to-top { position: fixed; right: var(--space-3); bottom: var(--space-3); z-index: 90; display: inline-flex; align-items: center; gap: .4rem; min-height: 44px; padding: .6rem .85rem; border: 1px solid rgba(255,255,255,.16); border-radius: 999px; background: var(--c-dark); color: #fff; font: 750 .78rem var(--font-body); box-shadow: 0 10px 30px rgba(21,27,32,.25); cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(12px); transition: opacity .2s, visibility .2s, transform .2s, background .2s; }
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--c-primary-d); }
@media (max-width: 860px) {
  .wa-float {
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    bottom: var(--space-3);
    right: var(--space-3);
    z-index: 100;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--wa);
    color: #fff;
    box-shadow: 0 4px 16px rgba(37, 211, 102, .45);
    text-decoration: none;
    transition: transform .2s, box-shadow .2s;
    font-size: 1.6rem;
    line-height: 1;
  }
  .wa-float:hover {
    transform: scale(1.08);
    box-shadow: 0 6px 24px rgba(37, 211, 102, .55);
    color: #fff;
  }
  .back-to-top { right: var(--space-3); bottom: 92px; width: 46px; height: 46px; padding: 0; justify-content: center; border-radius: 50%; }
  .back-to-top span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
}

/* ── Breadcrumbs ─────────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem;
  align-items: center;
  font-size: .85rem;
  color: var(--c-muted);
  padding: var(--space-2) 0;
}
.breadcrumb a { color: var(--c-muted); }
.breadcrumb a:hover { color: var(--c-primary-d); }
.breadcrumb__sep { opacity: .5; }

/* ── Accordions / FAQ ────────────────────────────────────────── */
.accordion {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.accordion + .accordion { margin-top: var(--space-1); }
.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3);
  background: var(--c-white);
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-dark);
  text-align: left;
  min-height: 44px;
  transition: background .15s;
}
.accordion__trigger:hover { background: var(--c-bg); }
.accordion__trigger[aria-expanded="true"] { color: var(--c-primary-d); }
.accordion__icon { transition: transform .25s; flex-shrink: 0; }
.accordion__trigger[aria-expanded="true"] .accordion__icon { transform: rotate(180deg); }
.accordion__body {
  padding: 0 var(--space-3) var(--space-3);
  background: var(--c-white);
}

/* ── Tabs ────────────────────────────────────────────────────── */
.tabs {
  border-bottom: 2px solid var(--c-border);
  display: flex;
  gap: .2rem;
  flex-wrap: wrap;
}
.tab-btn {
  padding: .6rem var(--space-2);
  border: none;
  background: none;
  cursor: pointer;
  font-weight: 600;
  color: var(--c-muted);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: color .15s, border-color .15s;
  min-height: 44px;
}
.tab-btn[aria-selected="true"] {
  color: var(--c-primary-d);
  border-bottom-color: var(--c-primary);
}
.tab-panel { display: none; padding: var(--space-3) 0; }
.tab-panel.active { display: block; }

/* ── Utilidades ──────────────────────────────────────────────── */
.text-center  { text-align: center; }
.text-muted   { color: var(--c-muted); }
.text-accent  { color: var(--c-accent); }
.text-primary { color: var(--c-primary); }
.text-white   { color: #fff; }
.lead         { font-size: 1.15rem; line-height: 1.65; }
.mt-auto      { margin-top: auto; }
.mb-0         { margin-bottom: 0; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── prefers-reduced-motion ─────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .parallax-section { background-attachment: scroll; }
}