/* De Sur a Sur — shared design tokens & components (see DESIGN.md) */
:root{
  --sur:#102A43;      /* Azul Sur — primary */
  --sur-hover:#0B1E30;
  --ruta:#24577A;     /* Azul Ruta — secondary/accent */
  --hielo:#DCE7EF;    /* Azul Hielo — soft backgrounds */
  --acero:#515D68;    /* Gris Acero, darkened from DESIGN.md's #65717C to clear WCAG AA (4.0:1 -> 6.4:1) on tinted backgrounds */
  --carbon:#151A1F;   /* Carbón — high-contrast text */
  --nieve:#F7F9FA;    /* Blanco Nieve — primary background */
  --white:#FFFFFF;

  --font-display:"Manrope","Manrope Fallback",-apple-system,sans-serif;
  --font-body:"Inter","Inter Fallback",-apple-system,sans-serif;

  --radius-sm:6px;
  --radius-md:8px;
  --radius-lg:14px;

  --space-1:8px;--space-2:16px;--space-3:24px;--space-4:32px;
  --space-5:48px;--space-6:64px;--space-7:96px;--space-8:128px;

  --shadow-sm:0 1px 2px rgba(16,17,20,.06),0 1px 1px rgba(16,17,20,.04);
  --shadow-md:0 12px 32px rgba(16,17,20,.10);

  --ease:cubic-bezier(0.16,1,0.3,1);
  --max-w:1280px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;background:var(--nieve);color:var(--carbon);
  font-family:var(--font-body);line-height:1.6;-webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  margin:0;font-family:var(--font-display);font-weight:700;color:var(--sur);
  letter-spacing:-0.01em;line-height:1.12;
}
p{margin:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}
ul{margin:0;padding:0;list-style:none}
::selection{background:var(--sur);color:var(--nieve)}
:focus-visible{outline:2px solid var(--ruta);outline-offset:3px;border-radius:2px}
::-webkit-scrollbar{width:11px;height:11px}
::-webkit-scrollbar-track{background:var(--hielo)}
::-webkit-scrollbar-thumb{background:var(--acero);border-radius:8px;border:2.5px solid var(--hielo)}
::-webkit-scrollbar-thumb:hover{background:var(--sur)}
html{scrollbar-color:var(--acero) var(--hielo)}

.wrap{max-width:var(--max-w);margin:0 auto;padding:0 24px}
@media (min-width:768px){.wrap{padding:0 40px}}
@media (min-width:1200px){.wrap{padding:0 56px}}

.label{
  font-family:var(--font-body);font-weight:600;font-size:12.5px;
  text-transform:uppercase;letter-spacing:.14em;color:var(--ruta);
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-family:var(--font-body);font-weight:500;font-size:15px;line-height:1;white-space:nowrap;
  padding:15px 26px;border-radius:var(--radius-md);border:1.5px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--sur);color:var(--nieve)}
.btn-primary:hover{background:var(--ruta)}
.btn-secondary{background:transparent;border-color:var(--sur);color:var(--sur)}
.btn-secondary:hover{background:var(--hielo)}
.btn-ghost-light{background:transparent;border-color:rgba(247,249,250,.5);color:var(--nieve)}
.btn-ghost-light:hover{background:rgba(247,249,250,.12);border-color:var(--nieve)}
.btn-lg{padding:17px 32px;font-size:16px}

/* ---------- Placeholder tag ---------- */
.ph{
  display:inline-flex;align-items:center;gap:6px;
  background:#FFF4D6;color:#8A5A00;border:1px dashed #D69E2E;
  font-family:var(--font-body);font-size:12.5px;font-weight:600;
  padding:3px 9px;border-radius:5px;white-space:nowrap;
}
.ph::before{content:"◆";font-size:9px;color:#D69E2E}

/* ---------- Header ---------- */
header.site{
  position:sticky;top:0;z-index:60;background:rgba(247,249,250,.94);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(16,42,67,.08);
}
.header-row{display:flex;align-items:center;justify-content:space-between;height:84px;gap:24px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand .logo-mark{width:40px;height:40px;flex-shrink:0}
.brand-word{display:flex;flex-direction:column;line-height:1.15}
.brand-word b{font-family:var(--font-display);font-weight:800;font-size:16.5px;color:var(--sur);letter-spacing:.01em}
.brand-word span{font-family:var(--font-body);font-size:11px;font-weight:600;letter-spacing:.12em;color:var(--acero);text-transform:uppercase}

nav.primary{display:none;align-items:center;gap:8px}
nav.primary a{
  font-family:var(--font-body);font-weight:500;font-size:14.5px;color:var(--carbon);
  padding:10px 14px;border-radius:var(--radius-sm);transition:color .15s,background .15s;
}
nav.primary a:hover{color:var(--sur);background:var(--hielo)}
nav.primary a.current{color:var(--sur);font-weight:600}
@media (min-width:980px){nav.primary{display:flex}}

.header-actions{display:flex;align-items:center;gap:14px}
.header-actions .btn{display:none}
@media (min-width:640px){.header-actions .btn{display:inline-flex}}
.menu-btn{display:flex;background:none;border:none;padding:8px;color:var(--sur)}
@media (min-width:980px){.menu-btn{display:none}}

.mobile-nav{display:none;flex-direction:column;gap:2px;background:var(--nieve);border-bottom:1px solid rgba(16,42,67,.1);padding:14px 24px 24px}
.mobile-nav.open{display:flex}
.mobile-nav a{padding:13px 10px;font-weight:600;color:var(--sur);border-radius:var(--radius-sm);font-family:var(--font-body)}
.mobile-nav a:hover{background:var(--hielo)}
.mobile-nav a.btn{margin-top:12px;color:var(--nieve)}
.mobile-nav a.btn:hover{background:var(--ruta)}
@media (min-width:980px){.mobile-nav{display:none!important}}

/* ---------- Logo (inline SVG, classes let us theme per-context) ---------- */
.logo-mark .ring-outer{fill:none;stroke:var(--sur);stroke-width:5}
.logo-mark .ring-inner{fill:none;stroke:var(--acero);stroke-width:1.5;stroke-dasharray:3 7;opacity:.6}
.logo-mark .arm-main{fill:var(--sur)}
.logo-mark .arm-accent{fill:var(--ruta)}
.logo-mark .core-s{fill:var(--nieve);font-family:var(--font-display);font-weight:800}
.logo-mark--inverted .ring-outer{stroke:var(--nieve)}
.logo-mark--inverted .ring-inner{stroke:rgba(247,249,250,.55)}
.logo-mark--inverted .arm-main{fill:var(--nieve)}
.logo-mark--inverted .arm-accent{fill:rgba(247,249,250,.72)}
.logo-mark--inverted .core-s{fill:var(--sur)}

/* ---------- Section shell ---------- */
section{padding:var(--space-6) 0}
@media (min-width:900px){section{padding:var(--space-7) 0}}
.section-head{max-width:640px;margin-bottom:var(--space-4)}
.section-head .label{margin-bottom:14px;display:block}
.section-head h2{font-size:clamp(1.7rem,3.2vw,2.5rem);margin-bottom:14px}
.section-head p{color:var(--acero);font-size:17px;line-height:1.65}
.bg-hielo{background:var(--hielo)}
.bg-sur{background:var(--sur);color:var(--nieve)}
.bg-sur h2,.bg-sur h3{color:var(--nieve)}
.bg-carbon{background:var(--carbon);color:var(--nieve)}
.bg-carbon h2,.bg-carbon h3{color:var(--nieve)}

hr.rule{border:none;border-top:1px solid rgba(16,42,67,.12);margin:0}

/* Topographic contour texture (subtle, monochrome, low-contrast per DESIGN.md §6) */
.topo{position:relative;overflow:hidden}
.topo-lines{position:absolute;inset:0;pointer-events:none;opacity:.5;z-index:0}

/* ---------- Footer ---------- */
footer.site{background:var(--carbon);color:rgba(247,249,250,.62);padding:var(--space-6) 0 var(--space-3)}
.footer-grid{display:grid;gap:40px;margin-bottom:56px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.3fr 1fr 1fr 1fr}}
.footer-brand p{font-size:14px;line-height:1.7;color:rgba(247,249,250,.45);margin-top:16px;max-width:34ch}
.footer-col p.head{font-size:11.5px;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:rgba(247,249,250,.4);margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:rgba(247,249,250,.62);transition:color .15s}
.footer-col a:hover{color:var(--nieve)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;align-items:center;
  padding-top:26px;border-top:1px solid rgba(247,249,250,.1);font-size:12.5px;color:rgba(247,249,250,.35);
}
.footer-bottom a{color:rgba(247,249,250,.35)}
.footer-bottom a:hover{color:var(--nieve)}

/* ---------- Pillars (divided stat/value strip) ---------- */
.pillars{display:grid;border-top:1px solid rgba(16,42,67,.12)}
@media (min-width:860px){.pillars{grid-template-columns:repeat(4,1fr)}}
.pillar{padding:36px 8px 36px 0;border-bottom:1px solid rgba(16,42,67,.12)}
@media (min-width:860px){.pillar{border-bottom:none;border-right:1px solid rgba(16,42,67,.12);padding:8px 32px 8px 0}}
.pillar:last-child{border-right:none}
.pillar b{display:block;font-family:var(--font-display);font-weight:700;font-size:19px;color:var(--sur);margin-bottom:8px}
.pillar p{color:var(--acero);font-size:14.5px;line-height:1.6}

/* ---------- Segment / divided list rows ---------- */
.segments{display:flex;flex-direction:column}
.segment-row{display:grid;gap:20px;padding:28px 0;border-bottom:1px solid rgba(16,42,67,.12);align-items:baseline}
@media (min-width:760px){.segment-row{grid-template-columns:2.4fr auto;align-items:center;gap:32px}}
.segment-row:first-child{border-top:1px solid rgba(16,42,67,.12)}
.segment-name{font-family:var(--font-display);font-weight:700;font-size:22px;color:var(--sur)}
.segment-desc{color:var(--acero);font-size:15px;line-height:1.6;max-width:56ch}
.segment-row a.arrow{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:14px;color:var(--ruta);justify-self:start}
@media (min-width:760px){.segment-row a.arrow{justify-self:end}}
.segment-row a.arrow svg{transition:transform .2s var(--ease)}
.segment-row a.arrow:hover svg{transform:translateX(3px)}

/* ---------- Split block: photo placeholder + copy ---------- */
.fleet-split{display:grid;gap:0;border-radius:var(--radius-lg);overflow:hidden;border:1px solid rgba(16,42,67,.14)}
@media (min-width:860px){.fleet-split{grid-template-columns:1fr 1fr}}
.fleet-split.reverse{direction:rtl}
.fleet-split.reverse > *{direction:ltr}
.photo-slot{
  background:var(--hielo);min-height:280px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:10px;border:1px dashed rgba(16,42,67,.3);color:var(--acero);text-align:center;padding:24px;
}
.photo-slot svg{opacity:.55}
.photo-slot span{font-family:var(--font-body);font-size:13px;font-weight:600;max-width:26ch}
.fleet-copy{padding:44px 40px;background:var(--nieve);display:flex;flex-direction:column;justify-content:center}
.fleet-copy h3{font-size:24px;margin-bottom:14px}
.fleet-copy p{color:var(--acero);font-size:15.5px;line-height:1.65;margin-bottom:24px}

/* ---------- CTA band ---------- */
.cta-band{text-align:center}
.cta-band h2{color:var(--nieve);font-size:clamp(1.8rem,3.6vw,2.6rem);margin-bottom:16px}
.cta-band p{color:rgba(247,249,250,.68);font-size:16.5px;margin-bottom:34px}
.cta-band .meta{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px 28px;justify-content:center;font-size:13.5px;color:rgba(247,249,250,.55)}

/* ---------- Forms ---------- */
.form-grid{display:grid;gap:20px}
@media (min-width:700px){.form-grid{grid-template-columns:1fr 1fr}}
.form-grid .full{grid-column:1 / -1}
.field label{display:block;font-family:var(--font-body);font-weight:600;font-size:13px;color:var(--sur);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;font-family:var(--font-body);font-size:15px;color:var(--carbon);
  padding:13px 14px;border:1.5px solid rgba(16,42,67,.18);border-radius:var(--radius-sm);
  background:var(--white);transition:border-color .15s;
}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--ruta);outline:none}
.field textarea{resize:vertical;min-height:120px}
.field .hint{font-size:12.5px;color:var(--acero);margin-top:6px}

/* Reveal on scroll */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:translateY(0)}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}