/* ==========================================================================
   Potabilis Initiative — Landing page de donación única
   ========================================================================== */

/* --- Fuentes de marca (auto-alojadas, sin CDN) --- */
@font-face {
  font-family: 'Montserrat';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('assets/fonts/montserrat-600.woff2') format('woff2');
}
@font-face {
  font-family: 'Montserrat';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('assets/fonts/montserrat-700.woff2') format('woff2');
}
@font-face {
  font-family: 'Montserrat';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url('assets/fonts/montserrat-800.woff2') format('woff2');
}
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('assets/fonts/opensans-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('assets/fonts/opensans-600.woff2') format('woff2');
}
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('assets/fonts/opensans-700.woff2') format('woff2');
}

/* --- Variables de marca (brand-source/tokens/design-tokens.json) --- */
:root {
  --color-primary: #0070B8;        /* Ocean Blue — CTA exclusivo */
  --color-primary-light: #3395D4;
  --color-primary-dark: #005A93;
  --color-secondary: #009F6B;      /* Jade Green */
  --color-secondary-dark: #007A52;
  --color-accent: #E8A118;         /* Antique Gold — decorativo, nunca fondo de texto */
  --color-bg: #FFFFFF;
  --color-surface: #F8F9FC;
  --color-border: #E5E5E5;
  --color-text: #1A1A1A;
  --color-text-soft: #666666;

  --font-display: 'Montserrat', 'Trebuchet MS', Arial, sans-serif;
  --font-body: 'Open Sans', -apple-system, 'Segoe UI', Arial, sans-serif;

  --radius: 4px;
  --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.08);
  --max-width: 1200px;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.625;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.2;
  margin: 0;
  color: var(--color-text);
}

h1 { font-weight: 800; font-size: clamp(2rem, 4vw + 1rem, 3.5rem); line-height: 1.14; letter-spacing: -0.02em; }
h2 { font-weight: 700; font-size: clamp(1.75rem, 2.5vw + 1rem, 2rem); line-height: 1.25; }
h3 { font-weight: 600; font-size: clamp(1.25rem, 1.5vw + 1rem, 1.5rem); line-height: 1.33; }
h4 { font-weight: 600; font-size: 1.25rem; line-height: 1.4; }

p {
  margin: 0 0 var(--space-2);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.eyebrow {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
  display: block;
}

/* --- Foco visible (accesibilidad) --- */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* --- Botones --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 14px 28px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #FFFFFF;
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

.btn-large {
  padding: 18px 40px;
  font-size: 1rem;
}

.btn-outline-light {
  background: transparent;
  color: #FFFFFF;
  border-color: #FFFFFF;
}

.btn-outline-light:hover {
  background: #FFFFFF;
  color: var(--color-primary);
}

/* --- Franja sticky (header + aviso de emergencia) --- */
.top-stack {
  position: sticky;
  top: 0;
  z-index: 100;
}

/* --- Franja de emergencia --- */
.emergency-strip {
  background: #9B2C2C;
  color: #FFFFFF;
}

.emergency-strip .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  text-align: center;
  padding-top: 10px;
  padding-bottom: 10px;
  font-size: 0.875rem;
}

.emergency-strip .mini-cta {
  color: #FFFFFF;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: underline;
  white-space: nowrap;
}

.emergency-strip .mini-cta:hover {
  color: var(--color-accent);
}

/* --- Header --- */
.site-header {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(4px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}

.site-header .logo img {
  height: 40px;
  width: auto;
}

.site-header .logo {
  display: flex;
  align-items: center;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* --- Toggle de idioma --- */
.lang-toggle {
  display: flex;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.lang-toggle button {
  background: transparent;
  border: none;
  padding: 8px 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--color-text-soft);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.lang-toggle button[aria-pressed="true"] {
  background: var(--color-primary);
  color: #FFFFFF;
}

.lang-toggle button:not([aria-pressed="true"]):hover {
  background: var(--color-surface);
  color: var(--color-text);
}

/* --- Hero --- */
.hero {
  background: var(--color-surface);
  padding: var(--space-4) 0 var(--space-5);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: center;
}

.hero-copy p.lead {
  font-size: 1.125rem;
  color: var(--color-text-soft);
  max-width: 46ch;
}

.hero-copy h2 { font-size: clamp(2rem, 4vw + 1rem, 3.5rem); font-weight: 800; line-height: 1.14; letter-spacing: -0.02em; }

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  margin-top: var(--space-3);
}

.hero-cta-note {
  display: block;
  width: 100%;
  margin-top: var(--space-1);
  max-width: 42ch;
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--color-text-soft);
}

/* Placeholder de foto — bloque estilizado con color/logo de marca, no un hueco vacío */
.photo-placeholder {
  position: relative;
  background: linear-gradient(145deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  min-height: 280px;
  box-shadow: var(--shadow-soft);
}

.photo-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.12) 0, transparent 45%);
}

.photo-placeholder img.mark {
  width: 96px;
  height: auto;
  opacity: 0.9;
  filter: brightness(0) invert(1);
  position: relative;
}

.photo-placeholder .placeholder-label {
  position: absolute;
  bottom: var(--space-2);
  left: var(--space-2);
  right: var(--space-2);
  color: #FFFFFF;
  background: rgba(26, 26, 26, 0.55);
  font-size: 0.8125rem;
  font-family: var(--font-body);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius);
  line-height: 1.4;
}

/* Variante con foto real: mismo marco (radio, sombra, tamaño), sin degradado ni ícono */
.photo-placeholder.has-photo {
  background: none;
}

.photo-placeholder.has-photo::before {
  content: none;
}

.photo-placeholder.has-photo img.photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-photo .photo-placeholder {
  min-height: 320px;
}

/* --- Slider del hero --- */
.hero-slide {
  display: none;
}

.hero-slide.is-active {
  display: block;
  animation: heroFade 0.4s ease;
}

@keyframes heroFade {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-slide.is-active {
    animation: none;
  }
}

.hero-mission-link {
  display: inline-block;
  margin-top: var(--space-3);
  font-size: 0.875rem;
  color: var(--color-text-soft);
  text-decoration: underline;
}

.hero-mission-link:hover {
  color: var(--color-primary);
}

.hero-dots {
  display: flex;
  justify-content: center;
  gap: var(--space-1);
  margin-top: var(--space-4);
}

.hero-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  background: transparent;
  cursor: pointer;
}

.hero-dot.is-active {
  background: var(--color-primary);
}

/* --- Secciones genéricas --- */
section {
  padding: var(--space-5) 0;
}

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

.section-heading {
  max-width: 60ch;
  margin-bottom: var(--space-4);
}

.section-heading.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* --- El problema --- */
.problem-section .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  align-items: center;
}

.problem-section .photo-placeholder {
  min-height: 220px;
}

/* --- Tarjetas de solución --- */
.solutions-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.solution-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  box-shadow: var(--shadow-soft);
}

.solution-card .icon-mark {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-2);
}

.solution-card h3 {
  margin-bottom: var(--space-1);
}

/* --- #emergencia: tarjetas de acción --- */
.action-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.action-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  box-shadow: var(--shadow-soft);
}

.action-avatar {
  display: block;
  width: 88px;
  height: 88px;
  margin: 0 auto var(--space-2);
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--color-primary);
  box-shadow: var(--shadow-soft);
}

.action-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.action-card h3 {
  margin-bottom: var(--space-1);
}

.action-fact {
  margin: var(--space-2) 0 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
}

.emergency-cta-group {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-3);
}

.emergency-bridge {
  max-width: 60ch;
  margin: 0 auto;
  text-align: center;
  color: var(--color-text-soft);
  font-size: 0.9375rem;
}

/* --- Contexto del terremoto --- */
.context-body {
  max-width: 70ch;
  margin: 0 auto var(--space-4);
  text-align: center;
  color: var(--color-text-soft);
}

.context-section .impact-item .number {
  color: var(--color-primary);
}

.context-updated {
  margin-top: var(--space-3);
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-soft);
}

/* --- Quiénes somos --- */
.about-section .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  align-items: center;
}

.about-section .photo-placeholder {
  min-height: 260px;
}

.about-copy .eyebrow,
.about-copy h2 {
  margin-bottom: var(--space-2);
}

/* --- Historia concreta --- */
.story-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  align-items: stretch;
}

.story-section .photo-placeholder {
  min-height: 320px;
}

.story-tag {
  display: inline-block;
  margin-bottom: var(--space-2);
  font-size: 0.75rem;
  color: var(--color-text-soft);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 3px 10px;
  border-radius: 999px;
}

.story-copy blockquote {
  margin: 0 0 var(--space-3);
  padding-left: var(--space-3);
  border-left: 4px solid var(--color-accent);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  font-style: normal;
  color: var(--color-text);
}

.story-summary {
  margin-bottom: var(--space-2);
}

.story-copy cite {
  display: block;
  font-style: normal;
  font-size: 0.875rem;
  color: var(--color-text-soft);
}

.story-framing-wrap {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.story-framing {
  max-width: 65ch;
  margin: 0 auto var(--space-3);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--color-text);
}

.impact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  text-align: center;
}

.impact-item .number {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 3vw + 1rem, 2.75rem);
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-1);
}

.impact-item .label {
  font-size: 0.9375rem;
  color: #D4D4D4;
}

/* --- Nuestra trayectoria: bloques A/B/C con atribución explícita --- */
.track-block {
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-3);
  margin-bottom: var(--space-4);
  text-align: center;
}

.track-block:last-child {
  margin-bottom: 0;
}

.track-lead {
  max-width: 65ch;
  margin: var(--space-1) auto 0;
  font-size: 1.0625rem;
}

.track-grid .impact-item .number {
  font-size: clamp(1.5rem, 2.2vw + 1rem, 2rem);
}

.track-grid.track-grid-2 {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  text-align: center;
}

/* Bloque A — trayectoria de Fundación Potabilis (oscuro, cifras doradas) */
.track-block-foundation {
  background: var(--color-text);
  color: #FFFFFF;
  box-shadow: var(--shadow-soft);
}

.track-block-foundation .track-lead {
  color: #E5E5E5;
}

.track-attribution {
  margin-top: var(--space-3);
  font-size: 0.8125rem;
  color: #A3A3A3;
  font-style: italic;
}

/* Bloque B — la alianza en acción 2026 (claro, cifras azules) */
.track-block-alliance {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.track-block-alliance h3 {
  margin-top: var(--space-1);
}

.track-block-alliance .track-lead {
  color: var(--color-text-soft);
}

.track-block-alliance .impact-item .number {
  color: var(--color-primary);
}

.track-block-alliance .impact-item .label {
  color: var(--color-text-soft);
}

/* Bloque C — el rol de Potabilis Initiative (texto de cierre) */
.track-block-role {
  padding-bottom: 0;
}

.track-block-role h3 {
  margin-top: var(--space-1);
}

.role-body {
  max-width: 70ch;
  margin: var(--space-2) auto 0;
  color: var(--color-text-soft);
}

/* --- Cierre / CTA final --- */
.final-cta {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #FFFFFF;
  text-align: center;
}

.final-cta h2 {
  color: #FFFFFF;
  max-width: 32ch;
  margin: 0 auto var(--space-2);
}

.final-cta p.lead {
  max-width: 50ch;
  margin: 0 auto var(--space-4);
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.125rem;
}

.final-cta .btn-primary {
  background: #FFFFFF;
  color: var(--color-primary-dark);
}

.final-cta .btn-primary:hover {
  background: var(--color-surface);
}

.final-cta-note {
  margin-top: var(--space-3);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.8);
}

/* --- Footer --- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) 0;
  font-size: 0.875rem;
  color: var(--color-text-soft);
}

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

.site-footer .footer-logo img {
  height: 56px;
  margin-bottom: var(--space-2);
}

.site-footer strong {
  color: var(--color-text);
}

.site-footer a {
  color: var(--color-text-soft);
  text-decoration: underline;
}

.site-footer a:hover {
  color: var(--color-primary);
}

.site-footer .legal-status {
  margin-top: var(--space-1);
}

.footer-links-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.footer-copyright {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-soft);
}

/* --- Páginas legales (privacidad, términos, donaciones) --- */
.legal-hero {
  background: var(--color-surface);
  padding: var(--space-4) 0 var(--space-3);
}

.legal-hero .container {
  max-width: 760px;
}

.legal-back {
  display: inline-block;
  margin-bottom: var(--space-3);
  font-size: 0.875rem;
  color: var(--color-text-soft);
  text-decoration: underline;
}

.legal-back:hover {
  color: var(--color-primary);
}

.legal-updated {
  margin-top: var(--space-3);
  font-size: 0.8125rem;
  color: var(--color-text-soft);
}

.legal-content {
  padding: var(--space-4) 0;
}

.legal-content .container {
  max-width: 760px;
}

.legal-content h2 {
  margin-top: var(--space-4);
  margin-bottom: var(--space-2);
  color: var(--color-primary);
}

.legal-content > div:first-child h2 {
  margin-top: 0;
}

.legal-content p {
  color: var(--color-text);
}

.legal-content ul,
.legal-content ol {
  margin: 0 0 var(--space-2);
  padding-left: 1.25em;
}

.legal-content li {
  margin-bottom: var(--space-1);
}

.legal-content a {
  text-decoration: underline;
}

.legal-content code {
  font-family: var(--font-body);
  background: var(--color-surface);
  padding: 2px 6px;
  border-radius: var(--radius);
}

/* --------------------------------------------------------------------------
   Responsive — tablet / desktop
   -------------------------------------------------------------------------- */
@media (min-width: 720px) {
  .impact-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .solutions-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .action-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .context-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .track-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .site-footer .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .hero .container {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .about-section .container {
    grid-template-columns: 1fr 1fr;
  }

  .problem-section .container {
    grid-template-columns: 1fr 1fr;
  }

  .story-grid {
    grid-template-columns: 1fr 1fr;
  }

  .track-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .site-header .logo img {
    height: 52px;
  }
}