:root {
  --ink: #0b2430;
  --ink-soft: #345260;
  --paper: #eef7f6;
  --foam: #f7fcfb;
  --river: #0c6b7a;
  --river-deep: #074652;
  --glacier: #2aa7b8;
  --moss: #1f7a5c;
  --mist: #b7ddd8;
  --sand: #d4c4a8;
  --line: rgba(11, 36, 48, 0.12);
  --shadow: 0 24px 60px rgba(7, 70, 82, 0.12);
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Sora", system-ui, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --header-h: 4.25rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(42, 167, 184, 0.18), transparent 55%),
    radial-gradient(900px 500px at 100% 20%, rgba(31, 122, 92, 0.12), transparent 50%),
    linear-gradient(180deg, #e4f3f1 0%, var(--paper) 28%, #e8f0ee 100%);
  line-height: 1.65;
  overflow-x: hidden;
}

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

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--river-deep);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 1000;
  border-radius: 0.4rem;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background 0.35s var(--ease), backdrop-filter 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(238, 247, 246, 0.88);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line);
}

.header-inner {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--foam);
  transition: color 0.3s var(--ease);
}

.site-header.is-scrolled .logo {
  color: var(--river-deep);
}

.logo-mark {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50% 50% 45% 55%;
  background: linear-gradient(145deg, var(--glacier), var(--river-deep));
  box-shadow: 0 0 0 3px rgba(42, 167, 184, 0.25);
  animation: drip 4s ease-in-out infinite;
}

@keyframes drip {
  0%, 100% { transform: scale(1) rotate(0deg); }
  50% { transform: scale(1.08) rotate(8deg); }
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  color: rgba(247, 252, 251, 0.88);
  transition: color 0.25s var(--ease), opacity 0.25s;
}

.site-header.is-scrolled .nav a {
  color: var(--ink-soft);
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--glacier);
}

.site-header.is-scrolled .nav a:hover,
.site-header.is-scrolled .nav a:focus-visible {
  color: var(--river);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 1.35rem;
  height: 2px;
  margin: 0.3rem auto;
  background: var(--foam);
  transition: background 0.3s;
}

.site-header.is-scrolled .nav-toggle span {
  background: var(--ink);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  align-items: end;
  color: var(--foam);
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  transform: scale(1.04);
  animation: heroDrift 28s ease-in-out infinite alternate;
}

@keyframes heroDrift {
  from { transform: scale(1.04) translate3d(0, 0, 0); }
  to { transform: scale(1.1) translate3d(-1.5%, -1%, 0); }
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(7, 40, 52, 0.45) 0%, rgba(7, 70, 82, 0.35) 40%, rgba(7, 50, 58, 0.82) 100%),
    radial-gradient(ellipse at 70% 20%, rgba(42, 167, 184, 0.25), transparent 50%);
}

.hero-wave {
  position: absolute;
  left: -5%;
  right: -5%;
  bottom: -1px;
  height: 90px;
  background:
    radial-gradient(120% 100% at 50% 0%, transparent 55%, var(--paper) 56%);
  animation: waveShift 8s ease-in-out infinite alternate;
}

@keyframes waveShift {
  from { transform: translateX(-1.5%); }
  to { transform: translateX(1.5%); }
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: calc(var(--header-h) + 3rem) 0 5.5rem;
  max-width: 38rem;
  margin-left: max(1.25rem, calc((100% - 1120px) / 2 + 1.25rem));
  animation: riseIn 1.1s var(--ease) both;
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.edu-badge {
  display: inline-block;
  margin: 0 0 0.85rem;
  padding: 0.35rem 0.85rem;
  border: 1px solid rgba(247, 252, 251, 0.45);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(247, 252, 251, 0.9);
  background: rgba(7, 70, 82, 0.28);
}

.brand {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 5.4rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-body);
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  font-weight: 500;
  line-height: 1.35;
  color: rgba(247, 252, 251, 0.92);
  max-width: 22ch;
}

.lead {
  margin: 0 0 1.75rem;
  font-size: 1.02rem;
  color: rgba(247, 252, 251, 0.78);
  max-width: 36ch;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.7rem 1.35rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.25s var(--ease), background 0.25s, color 0.25s, border-color 0.25s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--foam);
  color: var(--river-deep);
}

.btn-primary:hover {
  background: #fff;
}

.btn-ghost {
  border: 1.5px solid rgba(247, 252, 251, 0.55);
  color: var(--foam);
  background: transparent;
}

.btn-ghost:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

/* Sections shared */
.section {
  padding: clamp(4rem, 9vw, 6.5rem) 0;
}

.section-head {
  max-width: 40rem;
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

.eyebrow {
  margin: 0 0 0.6rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--river);
}

.section-head h2 {
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.section-lead {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

/* Riqueza */
.origen-grid {
  display: grid;
  gap: 1.5rem 2.5rem;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 3rem;
}

.origen-block {
  padding-top: 1rem;
  border-top: 2px solid var(--river);
}

.origen-num {
  display: block;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--glacier);
  margin-bottom: 0.7rem;
}

.origen-block h3 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.origen-block p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.fuentes-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2rem;
  align-items: start;
  padding: 2rem 0 0;
  border-top: 1px solid var(--line);
}

.fuentes-copy h3 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: -0.02em;
}

.fuentes-copy p {
  margin: 0;
  color: var(--ink-soft);
}

.fuentes-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}

.fuentes-list li {
  display: grid;
  gap: 0.25rem;
  padding-left: 1rem;
  border-left: 3px solid var(--mist);
}

.fuentes-list strong {
  font-size: 1.02rem;
  color: var(--river-deep);
}

.fuentes-list span {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* Del río al hogar */
.section-camino {
  background:
    linear-gradient(180deg, rgba(7, 70, 82, 0.04), transparent 40%),
    linear-gradient(135deg, #d9efe9 0%, #e7f4f2 45%, #dceee8 100%);
  position: relative;
}

.section-camino::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(42, 167, 184, 0.12) 0 1px, transparent 1.5px),
    radial-gradient(circle at 80% 70%, rgba(31, 122, 92, 0.1) 0 1px, transparent 1.5px);
  background-size: 28px 28px, 36px 36px;
  pointer-events: none;
  opacity: 0.7;
}

.section-camino .container {
  position: relative;
}

.camino-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 2.5rem;
  align-items: start;
}

.camino-layout .section-head {
  margin-bottom: 0;
}

.proceso {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  counter-reset: paso;
}

.proceso li {
  counter-increment: paso;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.35rem 1rem;
  align-items: baseline;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.proceso li::before {
  content: counter(paso, decimal-leading-zero);
  grid-row: 1 / span 2;
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--river);
  line-height: 1;
}

.proceso strong {
  font-size: 1.05rem;
}

.proceso p {
  margin: 0;
  grid-column: 2;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.camino-note {
  margin-top: 2.5rem;
  padding: 1.5rem 0 0;
  border-top: 1px solid var(--line);
}

.camino-note p {
  margin: 0;
  max-width: 46rem;
  color: var(--ink-soft);
}

/* Ciclo */
.section-ciclo {
  background:
    linear-gradient(180deg, transparent, rgba(42, 167, 184, 0.08) 40%, transparent);
}

.ciclo-stage {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 2rem;
  align-items: center;
}

.ciclo-visual {
  display: grid;
  place-items: center;
}

.ciclo-svg {
  width: min(100%, 360px);
  height: auto;
}

.ciclo-orbit {
  animation: spinSlow 28s linear infinite;
  transform-origin: 210px 210px;
}

.ciclo-dots {
  animation: spinSlow 18s linear infinite;
  transform-origin: 210px 210px;
}

.ciclo-core {
  animation: pulseCore 3.5s ease-in-out infinite;
  transform-origin: 210px 210px;
}

@keyframes spinSlow {
  to { transform: rotate(360deg); }
}

@keyframes pulseCore {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.ciclo-steps {
  display: grid;
  gap: 0.55rem;
}

.ciclo-tab {
  text-align: left;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.45);
  border-radius: 1rem;
  padding: 1rem 1.15rem;
  cursor: pointer;
  transition: background 0.3s var(--ease), border-color 0.3s, transform 0.3s var(--ease);
  font: inherit;
  color: inherit;
}

.ciclo-tab:hover {
  background: rgba(255, 255, 255, 0.75);
}

.ciclo-tab.is-active {
  background: #fff;
  border-color: rgba(12, 107, 122, 0.25);
  box-shadow: var(--shadow);
  transform: translateX(4px);
}

.tab-label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--river-deep);
}

.tab-text {
  display: block;
  color: var(--ink-soft);
  font-size: 0.94rem;
  line-height: 1.55;
}

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

.cuidar-item h3 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: -0.02em;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--glacier);
}

.cuidar-item ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.85rem;
}

.cuidar-item li {
  position: relative;
  padding-left: 1.15rem;
  color: var(--ink-soft);
  font-size: 0.97rem;
}

.cuidar-item li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--moss);
}

.compromiso {
  margin: 3.5rem 0 0;
  padding: 0;
  border: 0;
  text-align: center;
}

.compromiso p {
  margin: 0 auto;
  max-width: 28rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--river-deep);
  font-style: italic;
}

/* Footer */
.site-footer {
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, transparent, rgba(7, 70, 82, 0.06));
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 3rem;
  justify-content: space-between;
  align-items: end;
}

.footer-brand {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--river-deep);
}

.footer-copy {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
  max-width: 32rem;
}

.footer-disclaimer {
  margin: 0.85rem 0 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
  max-width: 32rem;
  line-height: 1.5;
}

.footer-credit {
  margin: 0;
  color: var(--river-deep);
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.5;
  text-align: right;
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 960px) {
  .origen-grid,
  .cuidar-grid,
  .camino-layout,
  .ciclo-stage,
  .fuentes-panel {
    grid-template-columns: 1fr;
  }

  .ciclo-visual {
    order: -1;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
    z-index: 60;
  }

  .nav {
    position: fixed;
    inset: 0;
    background: rgba(7, 50, 58, 0.96);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s var(--ease), visibility 0.3s;
  }

  .nav.is-open {
    opacity: 1;
    visibility: visible;
  }

  .nav a {
    color: var(--foam);
    font-size: 1.2rem;
  }

  .site-header.is-scrolled .nav a {
    color: var(--foam);
  }

  .hero-content {
    margin-left: auto;
    margin-right: auto;
    padding-bottom: 4.5rem;
  }

  .brand {
    font-size: clamp(2.4rem, 12vw, 3.6rem);
  }

  .footer-credit {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-media img,
  .hero-wave,
  .logo-mark,
  .ciclo-orbit,
  .ciclo-dots,
  .ciclo-core,
  .reveal {
    animation: none !important;
    transition: none !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}