/* ============================================================
   BASE.CSS - Estilos globales: Header & Footer
   Meridià Estudio — Diseño mínimalista, elegante y arquitectónico
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@100;200;300;400;500;600&display=swap');

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

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #8a8a8a;
  --color-border: #e0e0e0;
  --color-light-bg: #f5f5f3;
  --color-accent: #5a6b7c;
  --font-main: 'Montserrat', sans-serif;
  --header-height: 72px;
  --max-width: 1280px;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

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

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

ul {
  list-style: none;
}

/* ---- HEADER ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
}

/* Logo */
.header-logo {
  flex: 0 0 auto;
}

.header-logo img {
  height: 44px;
  width: auto;
}

/* Nav */
.header-nav {
  display: flex;
  align-items: center;
  gap: 40px;
}

.header-nav a {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text);
  position: relative;
  padding-bottom: 3px;
}

.header-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-text);
  transition: width var(--transition);
}

.header-nav a:hover::after,
.header-nav a.active::after {
  width: 100%;
}

.header-nav a.active {
  color: var(--color-text);
}

/* Right side: RRSS + Language */
.header-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header-social {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  color: var(--color-text);
  transition: color var(--transition), transform var(--transition);
}

.header-social a:hover {
  color: var(--color-accent);
  transform: scale(1.1);
}

.header-social svg {
  width: 18px;
  height: 18px;
}

/* Language Selector */
.lang-selector {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  position: relative;
}

.lang-current {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  background: none;
  border: none;
  font-family: var(--font-main);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text);
  padding: 4px 0;
}

.lang-current:hover {
  color: var(--color-accent);
}

.lang-flag-img {
  display: block;
  border-radius: 1px;
}

.lang-arrow {
  font-size: 8px;
  margin-left: 1px;
  transition: transform var(--transition);
  display: inline-block;
}

.lang-selector.open .lang-arrow {
  transform: rotate(180deg);
}

.lang-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  background: #fff;
  border: 1px solid var(--color-border);
  min-width: 130px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  z-index: 1001;
}

.lang-selector.open .lang-dropdown {
  display: block;
}

.lang-dropdown a,
.lang-dropdown .lang-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: background var(--transition);
  color: var(--color-text);
}

.lang-dropdown a:hover,
.lang-dropdown .lang-option:hover {
  background: var(--color-light-bg);
  color: var(--color-text);
}

/* Botones de idioma: resetear estilos de button */
.lang-dropdown .lang-option {
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}

/* Hamburger Mobile */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

.hamburger span {
  display: block;
  height: 1px;
  background: var(--color-text);
  transition: all var(--transition);
}

.hamburger.open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile Nav Overlay */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background: rgba(255,255,255,0.98);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 36px;
  z-index: 999;
  animation: fadeIn 0.3s ease;
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav a {
  font-size: 14px;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text);
}

/* ---- MAIN CONTENT OFFSET ---- */
.main-content {
  margin-top: var(--header-height);
}

/* ---- FOOTER ---- */
.site-footer {
  background-color: var(--color-light-bg);
  border-top: 1px solid var(--color-border);
  padding: 60px 32px 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-col h4 {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 20px;
}

.footer-col p,
.footer-col a {
  display: block;
  font-size: 12px;
  font-weight: 300;
  color: var(--color-text);
  line-height: 2;
  letter-spacing: 0.03em;
}

.footer-col a:hover {
  color: var(--color-accent);
}

.footer-social-icons {
  display: flex;
  gap: 14px;
  margin-top: 4px;
}

.footer-social-icons a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  transition: border-color var(--transition), color var(--transition);
}

.footer-social-icons a:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}

.footer-social-icons svg {
  width: 16px;
  height: 16px;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-bottom p {
  font-size: 11px;
  font-weight: 300;
  color: var(--color-muted);
  letter-spacing: 0.05em;
}

.footer-legal {
  display: flex;
  gap: 24px;
}

.footer-legal a {
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  transition: color var(--transition);
}

.footer-legal a:hover {
  color: var(--color-text);
}

/* ---- ANIMATIONS ---- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Admin access button (footer) ---- */
.footer-admin-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  color: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  transition: color var(--transition), border-color var(--transition);
  flex-shrink: 0;
}

.footer-admin-btn:hover {
  color: var(--color-muted);
  border-color: var(--color-muted);
}

.footer-admin-btn svg {
  width: 14px;
  height: 14px;
}

/* ---- Page Header (compartido entre páginas) ---- */
.page-header {
  padding: 64px 32px 40px;
  max-width: var(--max-width);
  margin: 0 auto;
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  font-size: clamp(22px, 3vw, 38px);
  font-weight: 200;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .header-nav {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .page-header {
    padding: 48px 20px 32px;
  }
  .header-inner {
    padding: 0 20px;
  }
  .footer-inner {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  .footer-legal {
    flex-wrap: wrap;
    gap: 12px;
  }
  .site-footer {
    padding: 40px 20px 0;
  }
}