:root {
  --color-primary: #316998;
  --color-secondary: #3c626e;
  --color-graphite: #292929;
  --color-white: #fefefe;
  --color-lime: #dadf0c;
  --bg-header: rgba(49, 105, 152, 0.04);
  --bg-footer: rgba(49, 105, 152, 0.06);
  --bg-alt: #fafcfc;
  --divider: rgba(41, 41, 41, 0.11);
  --max-wide: 1050px;
  --max-narrow: 740px;
  --font-main: "Source Sans 3", sans-serif;
  --font-serif: "Libre Baskerville", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-white);
  color: var(--color-graphite);
  font-family: var(--font-main);
  font-size: 1.05rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-secondary); }
p { margin: 0 0 1.25rem; }
strong { font-weight: 600; }

h1, h2, h3 {
  margin-top: 0;
  color: var(--color-secondary);
  line-height: 1.2;
}
h1 { font-size: clamp(2.45rem, 5.5vw, 4.8rem); letter-spacing: -0.035em; }
h2 { font-size: clamp(1.75rem, 3vw, 2.35rem); }
h3 { font-size: 1.22rem; }
.font-serif, h1, h2 { font-family: var(--font-serif); font-weight: 400; }

.container { width: min(var(--max-wide), calc(100% - 3rem)); margin-inline: auto; }
.content-narrow { width: min(var(--max-narrow), calc(100% - 3rem)); margin-inline: auto; }
.section { padding: clamp(2.25rem, 4vw, 3.25rem) 0; }
.section--alt { background: var(--bg-alt); border-block: 1px solid var(--divider); }

.site-header {
  background: rgba(254, 254, 254, 0.94);
  border-bottom: 1px solid var(--divider);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
}
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: flex-end; }
nav { display: flex; align-items: center; gap: 1.5rem; }
nav a { display: inline-block; padding: 0.75rem 0.5rem; border-bottom: 2px solid transparent; color: var(--color-secondary); font-size: 1rem; font-weight: 600; }
nav a.active { border-bottom-color: var(--color-lime); color: var(--color-primary); }

.hero { padding: clamp(2.5rem, 4.5vw, 4rem) 0 clamp(2rem, 3.5vw, 2.75rem); }
.hero-grid { display: grid; grid-template-columns: 1fr; gap: clamp(2rem, 4vw, 3.25rem); }
.hero-copy { width: min(100%, 880px); margin-inline: auto; }
.hero h1 { margin-bottom: 1.4rem; }
.hero-lead { color: var(--color-secondary); font-family: var(--font-serif); font-size: clamp(1.28rem, 2.25vw, 1.65rem); line-height: 1.5; }
.hero-image { order: -1; margin: 0; border-radius: 16px; overflow: hidden; box-shadow: 0 18px 48px rgba(27, 50, 59, 0.08); }
.hero-image img { aspect-ratio: 2 / 1; width: 100%; object-fit: cover; }
.hero-intro { margin-top: 2rem; padding-top: 1.6rem; border-top: 1px solid var(--divider); }
.hero-intro h2 { position: relative; margin-bottom: 1.3rem; padding-bottom: 0.75rem; font-size: clamp(1.45rem, 2.5vw, 1.9rem); }
.hero-intro h2::after { content: ""; position: absolute; left: 0; bottom: 0; width: 42px; height: 2px; background: var(--color-lime); }
.hero-intro p:last-child { margin-bottom: 0; }
.eyebrow { margin-bottom: 0.75rem; color: var(--color-primary); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }

.btn {
  display: inline-block;
  border: 2px solid transparent;
  border-radius: 14px;
  padding: 0.7rem 1.1rem;
  font: 600 0.95rem var(--font-main);
  text-align: center;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: rgba(49, 105, 152, 0.08); border-color: rgba(49, 105, 152, 0.22); color: var(--color-primary); }
.btn--primary:hover { background: rgba(49, 105, 152, 0.15); }

.section-heading h2, .format-grid h2, .audience-grid h2, .contact-intro h2 { position: relative; padding-bottom: 0.8rem; }
.section-heading h2::after, .format-grid h2::after, .audience-grid h2::after, .contact-intro h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 42px;
  height: 2px;
  background: var(--color-lime);
}
.section-heading { max-width: 620px; margin-bottom: 2.25rem; }

#encuentro .container,
.format-grid,
.audience-grid,
.cost-grid,
.contact-layout {
  width: min(100%, 880px);
  margin-inline: auto;
}

.pillars { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--divider); border: 1px solid var(--divider); }
.pillars article { background: var(--color-white); padding: 2rem; }
.pillars p { margin-bottom: 0; font-size: 0.98rem; }
.pillar--cases { grid-column: 1 / -1; }
.pillar--cases > p { margin-bottom: 1.2rem; }
.axes-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem 2.5rem; margin: 0; padding-left: 1.4rem; }
.axes-list li { padding-left: 0.25rem; line-height: 1.45; }
.axes-list li::marker { color: var(--color-primary); font-weight: 700; }

.section--format { padding: clamp(2.25rem, 4vw, 3.25rem) 0 1.5rem; }
.format-grid { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: clamp(2.5rem, 8vw, 7rem); align-items: start; }
.format-details { display: grid; grid-template-columns: 1fr 1fr; margin: 0; border-top: 1px solid var(--divider); border-left: 1px solid var(--divider); }
.format-details div { min-height: 130px; padding: 1.35rem 1.5rem; border-right: 1px solid var(--divider); border-bottom: 1px solid var(--divider); }
.format-details dt { margin-bottom: 0.4rem; color: var(--color-primary); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; }
.format-details dd { margin: 0; color: var(--color-secondary); font-family: var(--font-serif); font-size: 1.12rem; line-height: 1.45; }
.format-details p { margin: 0.5rem 0 0; color: rgba(41, 41, 41, 0.72); font-size: 0.88rem; line-height: 1.4; }

.audience-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: clamp(2.5rem, 8vw, 7rem); align-items: start; }
.audience-copy { max-width: 620px; }
.note { border-left: 2px solid var(--color-lime); padding-left: 1rem; color: rgba(41, 41, 41, 0.78); font-size: 0.96rem; }

.section--format + .section { padding-block: 1.5rem; }

.section--cost { padding-block: 1.5rem; border-top: 1px solid var(--divider); }
.cost-grid { display: grid; grid-template-columns: 0.75fr 1.25fr; gap: clamp(2.5rem, 8vw, 7rem); align-items: center; }
.cost-grid h2 { position: relative; margin-bottom: 0; padding-bottom: 0.8rem; }
.cost-grid h2::after { content: ""; position: absolute; left: 0; bottom: 0; width: 42px; height: 2px; background: var(--color-lime); }
.cost-placeholder { padding: 1.5rem 0; border-block: 1px solid var(--divider); }
.cost-label { margin-bottom: 0.25rem; color: var(--color-primary); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; }
.cost-value { margin: 0; color: var(--color-secondary); font-family: var(--font-serif); font-size: 1.45rem; }

.section--contact { padding-top: 1.5rem; background: rgba(49, 105, 152, 0.035); border-top: 1px solid var(--divider); }
.contact-layout { display: grid; grid-template-columns: 1fr; gap: 1rem; align-items: start; }
.contact-intro { max-width: 680px; margin-inline: auto; text-align: center; }
.contact-intro h2::after { left: 50%; transform: translateX(-50%); }
.contact-form { display: grid; gap: 1.1rem; padding: clamp(1.5rem, 4vw, 2.5rem); background: var(--color-white); border: 1px solid var(--divider); border-radius: 16px; }
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field-help {
  margin: 0.15rem 0 0;
  border-left: 3px solid #a8ad00;
  border-radius: 0 6px 6px 0;
  padding: 0.5rem 0.65rem;
  background: rgba(218, 223, 12, 0.11);
  color: #656b00;
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.4;
}
label { font-size: 0.93rem; font-weight: 600; }
input, textarea {
  width: 100%;
  border: 1px solid rgba(41, 41, 41, 0.18);
  border-radius: 8px;
  padding: 0.78rem 0.9rem;
  background: var(--color-white);
  color: var(--color-graphite);
  font: inherit;
}
input:focus, textarea:focus { outline: 3px solid rgba(49, 105, 152, 0.14); border-color: var(--color-primary); }
textarea { resize: vertical; min-height: 150px; }
.hidden-field { display: none !important; }
.check-field { display: grid; grid-template-columns: 1.2rem 1fr; gap: 0.75rem; align-items: start; font-weight: 400; line-height: 1.45; }
.check-field input { width: 1.05rem; height: 1.05rem; margin-top: 0.18rem; accent-color: var(--color-primary); }
.privacy { margin: 0; color: rgba(41, 41, 41, 0.7); font-size: 0.85rem; }
.contact-form .btn { justify-self: start; }
.form-status { display: none; margin: 0; padding: 0.85rem 1rem; border-left: 2px solid var(--color-lime); background: var(--bg-alt); font-size: 0.92rem; }
.form-status.is-visible { display: block; }

footer { padding: 4rem 0 3rem; background: var(--bg-footer); border-top: 1px solid var(--divider); color: var(--color-secondary); text-align: center; font-size: 0.85rem; }
.footer-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 1.5rem; margin-bottom: 1.2rem; }
.footer-links a { color: var(--color-secondary); font-weight: 600; }
footer p { margin: 0; }

@media (max-width: 820px) {
  .header-inner { min-height: 70px; }
  nav { width: 100%; justify-content: center; gap: 1rem; }
  nav a { padding-inline: 0.15rem; }
  .hero-grid, .format-grid, .audience-grid, .cost-grid, .contact-layout { grid-template-columns: 1fr; }
  .hero-image img { aspect-ratio: 16 / 9; }
  .pillars { grid-template-columns: 1fr; }
  .pillar--cases { grid-column: auto; }
  .axes-list { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  body { font-size: 1rem; }
  .container, .content-narrow { width: min(100% - 2rem, var(--max-wide)); }
  .site-header { position: static; }
  .header-inner { padding-block: 0.45rem; }
  nav { gap: 0.55rem 0.9rem; flex-wrap: wrap; }
  nav a { padding-block: 0.35rem; font-size: 0.84rem; }
  .section { padding: 2.5rem 0; }
  .hero { padding: 1.75rem 0 2.5rem; }
  .pillars article { padding: 1.5rem; }
  .format-details { grid-template-columns: 1fr; }
  .format-details div { min-height: 0; }
  .contact-form { padding: 1.2rem; }
  .contact-form .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}