:root {
  --color-primary: #2E6DA4;
  --color-accent-blue: #2563EB;
  --color-sky: #C9DFF2;
  --color-text: #222;
  --color-text-dark: #182430;
  --color-text-muted: #5B6B78;
  --color-white: #fff;
  --color-border: #E2E5E9;

  /* Paleta check-in: azul marino aeropuerto + acento cian */
  --color-ci-navy: #0F2A46;
  --color-ci-navy-light: #16395C;
  --color-ci-cyan: #22C3D6;
  --color-ci-cyan-dark: #159AAB;
  --color-ci-pale: #EDF6F8;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Poppins', -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: #FBFDFE;
  color: var(--color-text);
}

a { color: var(--color-ci-cyan-dark); text-decoration: none; }

.ci-mono { font-family: 'JetBrains Mono', 'Courier New', monospace; }

/* ---------- Header ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 6%;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text-dark);
}

.logo-img { width: 36px; height: 36px; border-radius: 9px; object-fit: cover; }

.logo-fallback {
  width: 36px; height: 36px; border-radius: 9px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-blue));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-navy {
  background: linear-gradient(135deg, var(--color-ci-navy-light), var(--color-ci-navy));
  color: #fff;
  box-shadow: 0 8px 20px rgba(15, 42, 70, 0.3);
}
.btn-navy:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(15, 42, 70, 0.38); }

.btn-secondary {
  background: #fff;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn-secondary:hover { background: var(--color-sky); transform: translateY(-2px); }

.btn-lg { padding: 15px 34px; font-size: 0.95rem; }

/* ---------- Hero ---------- */
.ci-hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 80px 6% 30px;
  text-align: center;
}

.ci-eyebrow {
  display: inline-block;
  background: rgba(34, 195, 214, 0.12);
  color: var(--color-ci-cyan-dark);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 7px 18px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.ci-hero h1 {
  font-size: clamp(1.9rem, 4.4vw, 2.6rem);
  font-weight: 800;
  color: var(--color-text-dark);
  line-height: 1.25;
  margin-bottom: 16px;
}

.ci-hero p {
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1.7;
}

/* ---------- Boarding pass form ---------- */
.ci-form-section {
  padding: 40px 6% 90px;
  display: flex;
  justify-content: center;
}

.boarding-pass {
  display: flex;
  max-width: 780px;
  width: 100%;
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 24px 50px rgba(15, 42, 70, 0.16);
  overflow: hidden;
}

.bp-main {
  flex: 1;
  padding: 34px 32px;
}

.bp-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 26px;
}

.bp-logo {
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--color-ci-navy);
}

.bp-header-label {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--color-ci-cyan-dark);
  background: var(--color-ci-pale);
  padding: 5px 12px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.bp-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.bp-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.bp-field label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-dark);
}

.bp-field input {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: 10px;
  color: var(--color-text-dark);
  outline: none;
  transition: border-color 0.15s ease;
}

.bp-field input:focus { border-color: var(--color-ci-cyan); }

.bp-submit { margin-top: 6px; align-self: flex-start; }

.bp-alt-note {
  margin-top: 20px;
  font-size: 0.78rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* ---------- Stub (right side, ticket look) ---------- */
.bp-stub {
  width: 210px;
  flex-shrink: 0;
  background: var(--color-ci-navy);
  color: #fff;
  padding: 30px 22px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.bp-stub::before {
  content: "";
  position: absolute;
  left: -10px;
  top: 0;
  bottom: 0;
  width: 0;
  border-left: 2px dashed rgba(255, 255, 255, 0.25);
}

.bp-stub-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 4px;
}

.bp-stub-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.bp-stub-row span {
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.bp-stub-row strong {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 1rem;
  color: #fff;
}

.bp-stub-barcode {
  margin-top: auto;
  height: 46px;
  background: repeating-linear-gradient(
    90deg,
    #fff 0px, #fff 2px,
    transparent 2px, transparent 5px
  );
  opacity: 0.85;
  border-radius: 2px;
}

/* ---------- Sections ---------- */
.ci-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 6% 80px;
}

.ci-section-alt {
  max-width: none;
  background: var(--color-ci-pale);
  padding: 70px 6%;
}

.ci-section-alt > * { max-width: 1100px; margin-left: auto; margin-right: auto; }

.section-head {
  text-align: center;
  max-width: 620px;
  margin: 0 auto 44px;
}

.section-eyebrow {
  display: inline-block;
  color: var(--color-ci-cyan-dark);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-head h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 800;
  color: var(--color-text-dark);
  line-height: 1.3;
}

/* ---------- Timing ---------- */
.ci-timing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 24px;
}

.ci-timing-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 26px 22px;
  text-align: center;
}

.ci-timing-icon { font-size: 1.7rem; display: block; margin-bottom: 12px; }

.ci-timing-card h4 {
  font-size: 0.98rem;
  color: var(--color-text-dark);
  font-weight: 700;
  margin-bottom: 8px;
}

.ci-timing-card p {
  font-size: 0.86rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.ci-timing-card strong { color: var(--color-ci-navy); }

.ci-timing-note {
  text-align: center;
  font-size: 0.8rem;
  color: #B7791F;
  background: rgba(183, 121, 31, 0.08);
  padding: 12px 18px;
  border-radius: 10px;
  max-width: 700px;
  margin: 0 auto;
}

/* ---------- Steps ---------- */
.ci-steps-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.ci-step {
  background: #fff;
  border-radius: 16px;
  padding: 26px 20px;
  text-align: center;
  box-shadow: 0 8px 20px rgba(15, 42, 70, 0.06);
}

.ci-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-ci-cyan), var(--color-ci-cyan-dark));
  color: #fff;
  font-weight: 800;
  font-size: 1rem;
  margin-bottom: 14px;
}

.ci-step h4 {
  font-size: 0.96rem;
  color: var(--color-text-dark);
  font-weight: 700;
  margin-bottom: 8px;
}

.ci-step p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ---------- Requirements ---------- */
.ci-requirements-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.ci-req-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 18px 20px;
}

.ci-req-check {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-ci-pale);
  color: var(--color-ci-cyan-dark);
  font-weight: 800;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ci-req-item p {
  font-size: 0.88rem;
  color: var(--color-text);
  line-height: 1.6;
}

/* ---------- FAQ ---------- */
.ci-faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ci-faq-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 16px 20px;
}

.ci-faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.94rem;
  color: var(--color-text-dark);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ci-faq-item summary::after {
  content: "+";
  font-size: 1.2rem;
  color: var(--color-ci-cyan-dark);
  flex-shrink: 0;
  margin-left: 12px;
}

.ci-faq-item[open] summary::after { content: "–"; }

.ci-faq-item summary::-webkit-details-marker { display: none; }

.ci-faq-item p {
  margin-top: 12px;
  font-size: 0.87rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ---------- CTA final ---------- */
.ci-cta {
  background: linear-gradient(135deg, var(--color-ci-navy-light), var(--color-ci-navy));
  padding: 60px 6%;
  text-align: center;
}

.ci-cta-inner { max-width: 520px; margin: 0 auto; }

.ci-cta h2 {
  color: #fff;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 800;
  margin-bottom: 12px;
}

.ci-cta p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.94rem;
  line-height: 1.6;
  margin-bottom: 26px;
}

.ci-cta .btn-navy {
  background: linear-gradient(135deg, var(--color-ci-cyan), var(--color-ci-cyan-dark));
  box-shadow: 0 8px 20px rgba(34, 195, 214, 0.35);
}

/* ---------- Footer ---------- */
.ci-footer {
  text-align: center;
  padding: 30px 6%;
  background: #081726;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.82rem;
}

.ci-footer-links {
  margin-top: 10px;
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.ci-footer-links a { color: rgba(255, 255, 255, 0.72); }
.ci-footer-links a:hover { color: var(--color-ci-cyan); text-decoration: underline; }
.ci-footer-links span { color: rgba(255, 255, 255, 0.28); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .boarding-pass { flex-direction: column; }
  .bp-stub {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
  }
  .bp-stub::before { display: none; }
  .bp-stub-barcode { display: none; }
  .ci-timing-grid { grid-template-columns: 1fr; }
  .ci-steps-row { grid-template-columns: repeat(2, 1fr); }
  .ci-requirements-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .navbar { padding: 12px 5%; }
  .ci-hero { padding: 60px 6% 20px; }
  .bp-main { padding: 26px 22px; }
  .ci-steps-row { grid-template-columns: 1fr; }
}

/* =============================================================================
   Responsive — refuerzo para todos los dispositivos
   (móviles muy pequeños, tablets, laptops, monitores grandes y TV)
   ============================================================================= */

/* Red de seguridad global: nunca permitir scroll horizontal ni imágenes
   que se desborden del contenedor. */
html, body {
  width: 100%;
  overflow-x: hidden;
}

img, video, iframe, svg {
  max-width: 100%;
  height: auto;
}

/* --- Tablets (641px–860px): paso intermedio de 2 columnas en la
   ventana de check-in, que antes saltaba directo de 3 a 1 --- */
@media (min-width: 641px) and (max-width: 860px) {
  .ci-timing-grid { grid-template-columns: repeat(2, 1fr); }
  .ci-timing-card:last-child { grid-column: 1 / -1; max-width: 400px; margin: 0 auto; }
}

/* --- Móviles muy pequeños (320px–374px) --- */
@media (max-width: 374px) {
  .navbar { padding: 10px 4%; gap: 10px; }
  .nav-brand { font-size: 1rem; }
  .btn { padding: 9px 16px; font-size: 0.8rem; }
  .ci-hero { padding: 56px 5% 20px; }
  .bp-main { padding: 20px 16px; }
  .bp-stub { padding: 22px 16px; }
  .ci-timing-card, .ci-step, .ci-req-item, .ci-faq-item { padding: 16px; }
}

/* --- Móviles en horizontal (poca altura) --- */
@media (max-height: 480px) and (orientation: landscape) {
  .ci-hero { padding: 32px 6% 16px; }
}

/* --- Monitores grandes y televisores (1600px en adelante) --- */
@media (min-width: 1600px) {
  html { font-size: 17px; }
  .navbar { padding: 18px 4%; }
  .ci-hero { max-width: 880px; }
  .boarding-pass { max-width: 940px; }
  .ci-section, .ci-section-alt > * { max-width: 1300px; }
}

/* --- Televisores 4K / pantallas ultra anchas (2200px en adelante) --- */
@media (min-width: 2200px) {
  html { font-size: 19px; }
  .ci-hero { max-width: 1000px; }
  .boarding-pass { max-width: 1080px; }
  .ci-section, .ci-section-alt > * { max-width: 1480px; }
}