/* ==========================================================================
   Colegio Bilingüe Melanie Klein — Sitio web público
   ==========================================================================
   Paleta provisional coherente con MKS. Reemplazar variables cuando esté
   el branding oficial de Castilla.
   ========================================================================== */

:root {
  /* Colores */
  --color-primary:        #004477;
  --color-primary-dark:   #003559;
  --color-primary-soft:   #5ba3c7;
  --color-accent:         #efa441;
  --color-accent-dark:    #d68a26;
  --color-success:        #528d4d;
  --color-text:           #1c2733;
  --color-text-soft:      #4a5866;
  --color-text-muted:     #8892a0;
  --color-bg:             #ffffff;
  --color-bg-alt:         #f5f8fb;
  --color-border:         #e2e8f0;

  /* Tipografía */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  /* Layout */
  --container-max: 1200px;
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.10);
  --shadow-lg: 0 12px 32px rgba(0, 68, 119, 0.18);

  /* Transiciones */
  --transition: 0.25s ease;
}

/* ==========================================================================
   Reset y base
   ========================================================================== */
* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-primary-dark); }

h1, h2, h3, h4 {
  margin: 0 0 0.75rem;
  line-height: 1.25;
  color: var(--color-text);
  font-weight: 700;
}

h1 { font-size: clamp(2rem, 4vw + 1rem, 3.25rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 2.5vw + 0.5rem, 2.25rem); letter-spacing: -0.015em; }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1rem; color: var(--color-text-soft); }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

/* ==========================================================================
   Botones
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-ghost:hover {
  background: var(--color-primary);
  color: #ffffff;
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
}
.brand:hover { color: var(--color-text); }

.brand-logo {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
}

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-weight: 700; font-size: 1.1rem; color: var(--color-primary); }
.brand-tagline { font-size: 0.75rem; color: var(--color-text-muted); letter-spacing: 0.05em; }

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
}
.site-nav a {
  font-weight: 500;
  color: var(--color-text-soft);
  padding: 0.5rem 0;
  position: relative;
}
.site-nav a:hover { color: var(--color-primary); }
.site-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.site-nav a:hover::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0.5rem;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  padding: 5rem 0 6rem;
  background: linear-gradient(135deg, #f5f8fb 0%, #eaf2f9 100%);
  overflow: hidden;
  position: relative;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.hero-copy .lead {
  font-size: 1.15rem;
  color: var(--color-text-soft);
  margin-bottom: 2rem;
  max-width: 42ch;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  height: 360px;
}

.hero-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  opacity: 0.85;
}
.hero-shape--a {
  width: 280px; height: 280px;
  background: radial-gradient(circle at 30% 30%, var(--color-primary-soft), var(--color-primary));
  top: 20px; right: 40px;
}
.hero-shape--b {
  width: 160px; height: 160px;
  background: radial-gradient(circle at 30% 30%, var(--color-accent), var(--color-accent-dark));
  bottom: 20px; right: 220px;
}
.hero-shape--c {
  width: 90px; height: 90px;
  background: radial-gradient(circle at 30% 30%, #92bc5f, var(--color-success));
  top: 120px; right: 260px;
}

/* ==========================================================================
   Secciones
   ========================================================================== */
.section {
  padding: 5rem 0;
}
.section-alt {
  background: var(--color-bg-alt);
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3rem;
}

.grid { display: grid; gap: 2rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* ==========================================================================
   Valores
   ========================================================================== */
.values {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.value {
  padding: 1.5rem;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.value:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.value-icon { font-size: 2rem; margin-bottom: 0.5rem; }
.value h3 { font-size: 1rem; margin-bottom: 0.35rem; }
.value p { font-size: 0.9rem; margin: 0; color: var(--color-text-soft); }

/* ==========================================================================
   Cards genéricas
   ========================================================================== */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.level-card { border-top: 4px solid var(--color-primary); }
.level-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  background: rgba(0, 68, 119, 0.08);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
}

/* ==========================================================================
   CTA (Admisiones)
   ========================================================================== */
.cta-panel {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 3rem;
  align-items: center;
  padding: 3rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.cta-panel h3 { color: #ffffff; font-size: 1.5rem; }
.cta-panel p { color: rgba(255, 255, 255, 0.85); }
.cta-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 0.5rem;
}
.cta-list li {
  position: relative;
  padding-left: 1.5rem;
  color: rgba(255, 255, 255, 0.9);
}
.cta-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

.cta-actions { display: flex; flex-direction: column; gap: 0.75rem; align-items: flex-start; }
.cta-actions .btn { background: var(--color-accent); color: var(--color-primary-dark); border: none; }
.cta-actions .btn:hover { background: var(--color-accent-dark); color: #ffffff; }
.cta-hint { font-size: 0.85rem; color: rgba(255, 255, 255, 0.75); margin: 0; }

/* ==========================================================================
   Noticias
   ========================================================================== */
.news-grid { gap: 1.5rem; }
.news-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.news-cover {
  height: 180px;
  background: linear-gradient(135deg, var(--color-primary-soft), var(--color-primary));
  position: relative;
}
.news-card--placeholder .news-cover {
  background: repeating-linear-gradient(
    45deg,
    #e2e8f0,
    #e2e8f0 12px,
    #edf2f7 12px,
    #edf2f7 24px
  );
}
.news-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
.news-cat {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.news-body h3 { font-size: 1.05rem; }
.news-body p { font-size: 0.9rem; margin: 0; }

/* ==========================================================================
   Contacto
   ========================================================================== */
.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.25rem;
}
.contact-list li { display: grid; gap: 0.15rem; }
.contact-list strong {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-weight: 700;
}

.contact-form {
  display: grid;
  gap: 1rem;
  padding: 2rem;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}
.contact-form label { display: grid; gap: 0.35rem; }
.contact-form label > span {
  font-size: 0.85rem;
  color: var(--color-text-soft);
  font-weight: 500;
}
.contact-form label em {
  font-style: normal;
  color: var(--color-text-muted);
  font-weight: 400;
}
.contact-form input,
.contact-form textarea {
  font: inherit;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
  background: var(--color-bg);
  color: var(--color-text);
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 68, 119, 0.15);
}
.contact-form textarea { resize: vertical; min-height: 100px; }
.form-note {
  min-height: 1.25rem;
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.form-note.success { color: var(--color-success); }
.form-note.error { color: #dc2626; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.85);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 2rem;
  align-items: center;
}
.footer-brand { display: flex; align-items: center; gap: 0.75rem; }
.footer-logo { border-radius: var(--radius-sm); background: #ffffff; padding: 4px; }
.footer-name { margin: 0; font-weight: 700; color: #ffffff; }
.footer-tagline { margin: 0; font-size: 0.8rem; color: rgba(255, 255, 255, 0.7); }

.footer-nav {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}
.footer-nav a {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9rem;
}
.footer-nav a:hover { color: var(--color-accent); }

.footer-copy {
  margin: 0;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.65);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .values { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .cta-panel { grid-template-columns: 1fr; padding: 2rem; }
  .footer-inner { grid-template-columns: 1fr; text-align: center; }
  .footer-brand, .footer-nav { justify-content: center; }
}

@media (max-width: 640px) {
  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.25rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }
  .site-nav.is-open { max-height: 500px; }
  .site-nav ul { flex-direction: column; gap: 0.5rem; }
  .site-nav a { padding: 0.75rem 0; display: block; }
  .values { grid-template-columns: 1fr; }
  .section { padding: 3rem 0; }
  .hero { padding: 3rem 0 4rem; }
}