/* SEYTC — Proyecto SEP 2026
   Sistema visual: dossier técnico / sala de control.
   Paleta institucional + rojo de señal reservado para acción. */

:root {
  --ink: #0a1b33;
  --navy: #0c2a70;
  --navy-deep: #071528;
  --paper: #f4f6f9;
  --white: #ffffff;
  --muted: #5a6b84;
  --line: #dde3ec;
  --signal: #e01e37;
  --signal-ink: #b3162b;
  --signal-soft: #fdecef;
  --ok: #16794f;

  --display: "Space Grotesk", "Segoe UI", sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;

  --wrap: 1120px;
  --radius: 10px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

h1,
h2,
h3,
h4 {
  font-family: var(--display);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
}

p {
  margin: 0 0 1rem;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--signal);
  color: #fff;
  padding: 10px 16px;
  z-index: 100;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
}

/* ---------- Barra superior ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 21, 40, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.topbar__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 64px;
}
.brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  color: #fff;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand__mark {
  width: 26px;
  height: 26px;
  border: 2px solid var(--signal);
  border-radius: 6px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  padding: 3px;
  gap: 3px;
}
.brand__mark span {
  background: var(--signal);
  border-radius: 1px;
}
.brand__mark span:nth-child(2),
.brand__mark span:nth-child(3) {
  background: rgba(255, 255, 255, 0.55);
}
.nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 22px;
}
.nav a {
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
  font-size: 0.94rem;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
}
.nav a:hover {
  color: #fff;
  border-bottom-color: var(--signal);
}
.nav__cta {
  color: #fff !important;
  background: var(--signal);
  padding: 9px 16px !important;
  border-radius: 6px;
  font-weight: 600;
  border-bottom: none !important;
}
.nav__cta:hover {
  background: var(--signal-ink);
}
.nav-toggle {
  display: none;
  margin-left: auto;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
  border-radius: 6px;
  padding: 7px 10px;
  font: inherit;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: var(--navy-deep);
  color: #fff;
  overflow: hidden;
  padding: 84px 0 76px;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(120% 100% at 15% 0%, #000 35%, transparent 78%);
  pointer-events: none;
}
.hero .wrap {
  position: relative;
}
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(260px, 0.85fr);
  gap: 56px;
  align-items: end;
}
.kicker {
  font-size: 0.9rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #8fa6c8;
  margin: 0 0 18px;
}
.hero h1 {
  font-size: clamp(2.9rem, 7vw, 5.2rem);
  font-weight: 700;
  margin: 0;
}
.hero__year {
  display: inline-block;
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1rem, 2.2vw, 1.35rem);
  letter-spacing: 0.32em;
  color: var(--signal);
  margin: 14px 0 26px;
}
.hero__lead {
  font-size: clamp(1.05rem, 2.2vw, 1.28rem);
  color: #cdd9ec;
  max-width: 46ch;
  margin-bottom: 34px;
}

/* Tres frentes como elemento tipográfico principal */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  margin: 0 0 38px;
}
.pillars > div {
  padding: 20px 22px 4px 0;
  border-right: 1px solid rgba(255, 255, 255, 0.14);
}
.pillars > div:last-child {
  border-right: none;
  padding-right: 0;
}
.pillars > div + div {
  padding-left: 22px;
}
.pillars dt {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  text-transform: none;
  margin-bottom: 8px;
}
.pillars dt::before {
  content: "";
  display: inline-block;
  width: 9px;
  height: 9px;
  background: var(--signal);
  margin-right: 10px;
  vertical-align: 0.08em;
}
.pillars dd {
  margin: 0;
  font-size: 0.92rem;
  color: #a9bbd6;
  line-height: 1.5;
}

/* Tarjeta de metadatos */
.meta {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  padding: 22px 24px;
}
.meta__title {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #8fa6c8;
  margin: 0 0 14px;
}
.meta dl {
  margin: 0;
  display: grid;
  gap: 12px;
}
.meta dt {
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #7d93b6;
}
.meta dd {
  margin: 2px 0 0;
  font-size: 0.97rem;
  color: #e6edf8;
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1rem;
  padding: 14px 24px;
  border-radius: 7px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.btn svg {
  transition: transform 0.18s ease;
}
.btn:hover svg {
  transform: translateX(3px);
}
.btn--signal {
  background: var(--signal);
  color: #fff;
}
.btn--signal:hover {
  background: var(--signal-ink);
}
.btn--ghost {
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
}
.btn--ghost:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.06);
}
.btn--dark {
  background: var(--navy);
  color: #fff;
}
.btn--dark:hover {
  background: var(--ink);
}
:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- Secciones ---------- */
.section {
  padding: 78px 0;
}
.section--alt {
  background: var(--white);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section__head {
  max-width: 720px;
  margin-bottom: 46px;
}
.section__index {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.16em;
  color: var(--signal);
  margin: 0 0 10px;
}
.section h2 {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  margin: 0 0 14px;
}
.section__head p {
  color: var(--muted);
  font-size: 1.06rem;
  margin: 0;
}

.lead-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.lead-cols p {
  margin: 0;
  color: var(--muted);
}
.lead-cols strong {
  color: var(--ink);
}

/* Frentes detallados */
.frentes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.frente {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  display: flex;
  flex-direction: column;
}
.frente__tag {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: 14px;
}
.frente h3 {
  font-size: 1.45rem;
  margin: 0 0 12px;
}
.frente p {
  color: var(--muted);
  font-size: 0.96rem;
  margin: 0 0 18px;
}
.frente ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
  margin-top: auto;
}
.frente li {
  position: relative;
  padding-left: 20px;
  font-size: 0.93rem;
  color: var(--ink);
}
.frente li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 2px;
  background: var(--signal);
}

/* Plan por fases (secuencia real -> numeración) */
.phases {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}
.phase {
  display: grid;
  grid-template-columns: 96px 1fr 1.35fr;
  gap: 28px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.phase__num {
  font-family: var(--display);
  font-weight: 700;
  font-size: 2rem;
  color: var(--line);
  line-height: 1;
}
.phase__title {
  font-size: 1.2rem;
  margin: 0 0 4px;
}
.phase__when {
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--signal);
  margin: 0;
}
.phase__text {
  margin: 0;
  color: var(--muted);
  font-size: 0.97rem;
}

/* Arquitectura web / listas */
.cols2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 46px;
}
.tree {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.98rem;
}
.tree li {
  padding: 9px 0 9px 20px;
  border-bottom: 1px dashed var(--line);
  position: relative;
}
.tree li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 1.05em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--navy);
}
.tree code {
  font-family: var(--body);
  color: var(--navy);
  font-weight: 600;
}
.tree span {
  color: var(--muted);
}

.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 34px;
}
.checklist li {
  position: relative;
  padding: 7px 0 7px 30px;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--line);
}
.checklist li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 12px;
  height: 7px;
  border-left: 2px solid var(--ok);
  border-bottom: 2px solid var(--ok);
  transform: rotate(-45deg);
}

/* Listado por área */
.areas {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.area {
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--navy);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 22px 24px;
}
.area h3 {
  font-size: 1.05rem;
  margin: 0 0 10px;
}
.area ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 0.93rem;
}
.area li {
  margin-bottom: 4px;
}

/* KPIs */
.kpis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.kpi {
  background: var(--white);
  padding: 24px 26px;
}
.kpi__val {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.9rem;
  color: var(--navy);
  margin: 0 0 6px;
}
.kpi p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

/* CTA final */
.cta {
  background: var(--navy-deep);
  color: #fff;
  padding: 72px 0;
}
.cta__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  align-items: center;
  justify-content: space-between;
}
.cta h2 {
  font-size: clamp(1.6rem, 3.6vw, 2.3rem);
  margin: 0 0 8px;
}
.cta p {
  margin: 0;
  color: #a9bbd6;
  max-width: 52ch;
}

/* Footer */
.footer {
  background: var(--ink);
  color: #8fa6c8;
  padding: 44px 0;
  font-size: 0.9rem;
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: space-between;
  align-items: center;
}
.footer a {
  color: #cdd9ec;
  text-decoration: none;
}
.footer a:hover {
  color: #fff;
}
.footer__note {
  max-width: 520px;
}

/* Prototipo: banner */
.proto-banner {
  background: var(--signal-soft);
  border-bottom: 1px solid #f2c9d0;
  color: var(--signal-ink);
  font-size: 0.92rem;
  text-align: center;
  padding: 10px 16px;
}
.proto-banner a {
  color: var(--signal-ink);
  font-weight: 600;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero__grid,
  .lead-cols,
  .cols2,
  .areas {
    grid-template-columns: 1fr;
  }
  .hero__grid {
    gap: 40px;
  }
  .frentes {
    grid-template-columns: 1fr;
  }
  .kpis {
    grid-template-columns: 1fr;
  }
  .phase {
    grid-template-columns: 56px 1fr;
    gap: 16px 20px;
  }
  .phase__text {
    grid-column: 2;
  }
}

@media (max-width: 720px) {
  body {
    font-size: 16px;
  }
  .section {
    padding: 56px 0;
  }
  .nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--navy-deep);
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 14px 24px 22px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    display: none;
  }
  .nav.is-open {
    display: flex;
  }
  .nav a {
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }
  .nav__cta {
    text-align: center;
    margin-top: 8px;
  }
  .nav-toggle {
    display: block;
  }
  .pillars {
    grid-template-columns: 1fr;
  }
  .pillars > div {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
    padding: 16px 0;
  }
  .pillars > div + div {
    padding-left: 0;
  }
  .checklist {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* Única secuencia de entrada orquestada (hero) */
@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.hero__main > * {
  animation: riseIn 0.6s ease both;
}
.hero__main > *:nth-child(1) {
  animation-delay: 0.05s;
}
.hero__main > *:nth-child(2) {
  animation-delay: 0.12s;
}
.hero__main > *:nth-child(3) {
  animation-delay: 0.18s;
}
.hero__main > *:nth-child(4) {
  animation-delay: 0.24s;
}
.hero__main > *:nth-child(5) {
  animation-delay: 0.3s;
}
.hero__main > *:nth-child(6) {
  animation-delay: 0.36s;
}
.meta {
  animation: riseIn 0.6s ease 0.3s both;
}