/* ============================================================
   BOLETAIRES.CAT — Layout & Structure · Digital Herbarium
   ============================================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--on-surface);
  background-color: var(--surface-container-low);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a   { color: var(--primary-container); text-decoration: none; }
a:hover { color: var(--primary); }
ul, ol { list-style: none; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: var(--leading-tight);
  color: var(--on-background);
  letter-spacing: -0.01em;
}

p + p { margin-top: var(--space-4); }

/* Material Symbols baseline */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
  line-height: 1;
  font-size: 1.25em;
}

/* --- Container --- */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* --- Navigation (Glassmorphic, cream bg) --- */
.nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: var(--z-nav);
  height: var(--nav-height);
  background-color: rgba(252, 249, 240, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-nav);
  display: flex;
  align-items: center;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.nav__logo-text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  font-style: italic;
  color: var(--primary-container);
  letter-spacing: -0.02em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--on-surface-variant);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-xl);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav__link:hover {
  background-color: var(--surface-container-high);
  color: var(--primary);
}

.nav__link.active {
  color: var(--primary-container);
  border-bottom: 2px solid var(--primary-container);
  border-radius: 0;
  padding-bottom: calc(var(--space-2) - 2px);
}

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

/* Language switcher — pill track */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--surface-container-highest);
  border-radius: var(--radius-full);
  padding: 3px;
}

.lang-btn {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--on-surface-variant);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.lang-btn.active,
.lang-btn:hover {
  background: var(--surface-bright);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* Hamburger (mobile) */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: var(--space-2);
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--on-surface-variant);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* Mobile nav overlay */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(252, 249, 240, 0.97);
  backdrop-filter: blur(16px);
  z-index: calc(var(--z-nav) - 1);
  flex-direction: column;
  padding: var(--space-8) var(--space-6);
  gap: var(--space-2);
}

.nav__mobile.open { display: flex; }

.nav__mobile .nav__link {
  font-size: var(--text-lg);
  padding: var(--space-4);
}

/* --- Footer (light editorial) --- */
.footer {
  background-color: var(--surface-container);
  color: var(--on-surface-variant);
  padding: var(--space-12) 0;
  margin-top: var(--space-24);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-10);
  flex-wrap: wrap;
}

.footer__brand-name {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-style: italic;
  font-weight: 700;
  color: var(--primary-container);
  margin-bottom: var(--space-2);
}

.footer__brand-tagline {
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--outline);
  opacity: 0.7;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
}

.footer__desc {
  font-size: var(--text-sm);
  color: var(--outline);
  line-height: var(--leading-relaxed);
  max-width: 280px;
  margin-top: var(--space-3);
}

.footer__col-title {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary-container);
  margin-bottom: var(--space-5);
}

.footer__col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__col a {
  font-size: var(--text-sm);
  color: var(--outline);
  text-decoration: none;
  transition: color var(--transition-fast);
  opacity: 0.8;
}

.footer__col a:hover {
  color: var(--primary-container);
  opacity: 1;
}

.footer__bottom {
  padding-top: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer__copy {
  font-size: var(--text-xs);
  color: var(--outline);
  opacity: 0.6;
}

.footer__disclaimer {
  font-size: var(--text-xs);
  color: var(--outline);
  opacity: 0.6;
  text-align: right;
  max-width: 440px;
}

/* --- Section --- */
.section {
  padding-block: var(--section-pad);
}

.section--alt {
  background-color: var(--surface-container);
}

.section__header {
  margin-bottom: var(--space-12);
}

.section__eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--tertiary-fixed-dim);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.section__title {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--primary-container);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.section__subtitle {
  font-size: var(--text-lg);
  color: var(--on-surface-variant);
  max-width: 600px;
  line-height: var(--leading-relaxed);
}

/* --- Page header (inner pages — light editorial) --- */
.page-header {
  background-color: var(--surface-container-low);
  padding: var(--space-16) 0 var(--space-12);
  padding-top: calc(var(--nav-height) + var(--space-16));
}

.page-header__eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--tertiary-fixed-dim);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.page-header__title {
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--primary-container);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.page-header__subtitle {
  font-size: var(--text-lg);
  color: var(--on-surface-variant);
  max-width: 600px;
  margin-inline: auto;
  line-height: var(--leading-relaxed);
}

/* --- Breadcrumb --- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--on-surface-variant);
  padding-block: var(--space-4);
  padding-top: calc(var(--nav-height) + var(--space-4));
}

.breadcrumb a { color: var(--primary-container); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb__sep { color: var(--outline-variant); }

/* --- Grids --- */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-6);
}

/* --- Scroll to top --- */
.scroll-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  background: var(--primary-container);
  color: var(--on-primary);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-card);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-base);
  z-index: 50;
  font-size: var(--text-lg);
}

.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.scroll-top:hover {
  background: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}