:root {
  --aqua: #4f9da2;
  --aqua-dark: #2e7378;
  --aqua-soft: #dff0ef;
  --sun: #ffc20e;
  --orange: #f36a21;
  --ink: #173438;
  --ink-soft: #52696c;
  --paper: #fffdf8;
  --cream: #f7f1e7;
  --white: #ffffff;
  --line: rgba(23, 52, 56, .16);
  --serif: Georgia, "Times New Roman", serif;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --shadow: 0 28px 80px rgba(23, 52, 56, .14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
img { display: block; max-width: 100%; }
.shell { width: min(100% - 48px, 1240px); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; left: 16px; top: -60px; padding: 10px 14px; background: var(--ink); color: #fff; }
.skip-link:focus { top: 16px; }

.site-header {
  position: absolute;
  z-index: 20;
  inset: 0 0 auto;
  color: #fff;
}
.nav { min-height: 96px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
.brand img { width: 136px; height: 64px; object-fit: contain; filter: brightness(0) invert(1); }
.nav-main { display: flex; align-items: center; gap: 30px; }
.nav-main > a { position: relative; font-size: .875rem; font-weight: 650; }
.nav-main > a:not(.nav-contact)::after { content: ""; position: absolute; right: 0; bottom: -7px; left: 0; height: 1px; background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform .25s ease; }
.nav-main > a:hover::after, .nav-main > a:focus-visible::after { transform: scaleX(1); transform-origin: left; }
.nav-contact { padding: 10px 16px; border: 1px solid rgba(255,255,255,.45); border-radius: 999px; }
.nav-contact:hover { background: #fff; color: var(--ink); }
.lang { display: inline-flex; align-items: center; gap: 2px; padding: 3px; border: 1px solid rgba(255,255,255,.38); border-radius: 999px; }
.lang a { display: grid; min-width: 30px; height: 28px; place-items: center; border-radius: 999px; font-size: .68rem; font-weight: 800; }
.lang a[aria-current="page"] { background: #fff; color: var(--ink); }
.menu-toggle { display: none; border: 0; background: transparent; padding: 9px; }
.menu-toggle span { display: block; width: 25px; height: 1px; margin: 6px 0; background: currentColor; }

.hero {
  min-height: 780px;
  position: relative;
  display: grid;
  align-items: end;
  overflow: hidden;
  background: #1b4d51;
  color: #fff;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10,38,42,.96) 0%, rgba(13,49,53,.86) 43%, rgba(13,49,53,.20) 72%, rgba(13,49,53,.12) 100%),
    linear-gradient(0deg, rgba(10,38,42,.55), transparent 46%),
    url('/assets/mercedes-arana.jpg') 77% 31% / min(55vw, 760px) auto no-repeat;
}
.hero::after { content: ""; position: absolute; width: 520px; height: 520px; right: -270px; top: 102px; border: 1px solid rgba(255,194,14,.56); border-radius: 50%; }
.hero-inner { position: relative; z-index: 2; width: 100%; padding: 195px 0 82px; }
.hero-copy { max-width: 790px; }
.overline { margin: 0 0 20px; color: var(--sun); font-size: .73rem; font-weight: 850; letter-spacing: .17em; text-transform: uppercase; }
.hero h1 { margin: 0; max-width: 760px; font: 400 clamp(4.4rem, 8.1vw, 7.8rem)/.86 var(--serif); letter-spacing: -.065em; }
.hero h1 span { display: block; margin-left: .75em; color: var(--aqua-soft); font-style: italic; }
.hero-lead { max-width: 590px; margin: 35px 0 30px; color: #d9e7e5; font-size: clamp(1.06rem, 1.6vw, 1.25rem); line-height: 1.55; }
.hero-actions { display: flex; align-items: center; gap: 13px; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 12px; padding: 12px 19px; border: 1px solid currentColor; border-radius: 999px; font-size: .85rem; font-weight: 800; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-light { background: #fff; color: var(--ink); border-color: #fff; }
.button-ghost { color: #fff; border-color: rgba(255,255,255,.46); }
.button-ghost:hover { background: rgba(255,255,255,.10); }
.button-dark { background: var(--ink); color: #fff; border-color: var(--ink); }
.button-dark:hover { background: var(--aqua-dark); border-color: var(--aqua-dark); }
.button-arrow { font-size: 1rem; }
.hero-marker { position: absolute; right: 0; bottom: 78px; width: 230px; padding-top: 14px; border-top: 1px solid rgba(255,255,255,.42); color: #d7e7e4; font-size: .78rem; }
.hero-marker strong { display: block; color: #fff; font-size: .93rem; }

.statement { padding: 120px 0 108px; }
.statement-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 9vw; align-items: start; }
.index { display: inline-flex; align-items: center; gap: 11px; color: var(--aqua-dark); font-size: .69rem; font-weight: 850; letter-spacing: .15em; text-transform: uppercase; }
.index::before { content: ""; width: 34px; height: 1px; background: currentColor; }
.display { margin: 20px 0 0; font: 400 clamp(2.9rem, 5.2vw, 5.4rem)/.98 var(--serif); letter-spacing: -.05em; }
.display em { color: var(--aqua-dark); font-weight: 400; }
.statement-copy { max-width: 610px; padding-top: 44px; }
.statement-copy p { margin: 0 0 22px; color: var(--ink-soft); font-size: 1.11rem; }
.statement-copy .signature { margin-top: 32px; color: var(--ink); font: italic 1.42rem/1.3 var(--serif); }
.text-link { display: inline-flex; align-items: center; gap: 10px; padding-bottom: 4px; border-bottom: 1px solid currentColor; color: var(--aqua-dark); font-size: .83rem; font-weight: 850; }

.challenges { padding: 112px 0; background: var(--ink); color: #fff; }
.section-top { display: grid; grid-template-columns: 1.3fr .7fr; gap: 60px; align-items: end; margin-bottom: 58px; }
.section-top .display { max-width: 780px; }
.section-top > p { max-width: 390px; margin: 0 0 7px; color: #bdd1cf; }
.challenges .index { color: var(--sun); }
.challenge-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid rgba(255,255,255,.22); }
.challenge { min-height: 226px; position: relative; display: grid; grid-template-columns: 58px 1fr auto; gap: 22px; align-items: start; padding: 32px 26px 33px 0; border-bottom: 1px solid rgba(255,255,255,.22); }
.challenge:nth-child(odd) { padding-right: 42px; border-right: 1px solid rgba(255,255,255,.22); }
.challenge:nth-child(even) { padding-left: 42px; }
.challenge-number { color: var(--sun); font-size: .7rem; font-weight: 800; letter-spacing: .1em; }
.challenge h3 { max-width: 395px; margin: 0 0 12px; font: 400 clamp(1.65rem, 3vw, 2.55rem)/1.04 var(--serif); letter-spacing: -.035em; }
.challenge p { max-width: 430px; margin: 0; color: #a9c1bf; font-size: .91rem; }
.challenge-arrow { display: grid; width: 38px; height: 38px; place-items: center; border: 1px solid rgba(255,255,255,.38); border-radius: 50%; transition: background .2s ease, color .2s ease, transform .2s ease; }
.challenge:hover .challenge-arrow { background: var(--sun); color: var(--ink); border-color: var(--sun); transform: translate(3px,-3px); }
.challenge-wide { grid-column: 1 / -1; padding-right: 0 !important; border-right: 0 !important; }
.challenge-wide h3 { max-width: 720px; }
.challenge-wide p { max-width: 760px; }

.method { padding: 116px 0; background: var(--cream); }
.method-grid { display: grid; grid-template-columns: .78fr 1.22fr; gap: 9vw; align-items: start; }
.method-copy { position: sticky; top: 45px; }
.method-copy p { max-width: 420px; color: var(--ink-soft); }
.steps { counter-reset: method; }
.method-step { counter-increment: method; display: grid; grid-template-columns: 66px 1fr; gap: 24px; padding: 28px 0 35px; border-top: 1px solid var(--line); }
.method-step::before { content: "0" counter(method); color: var(--orange); font-size: .75rem; font-weight: 850; letter-spacing: .11em; }
.method-step h3 { margin: 0 0 8px; font: 400 clamp(2rem, 3.8vw, 3.2rem)/1 var(--serif); letter-spacing: -.045em; }
.method-step p { max-width: 520px; margin: 0; color: var(--ink-soft); }

.guide { padding: 110px 0 118px; background: var(--aqua-soft); }
.guide-intro { max-width: 720px; margin-bottom: 45px; }
.guide-intro .display { margin-bottom: 20px; }
.guide-intro > p { max-width: 610px; color: var(--ink-soft); }
.guide-card { position: relative; overflow: hidden; padding: 48px; background: var(--white); border-radius: 2px; box-shadow: var(--shadow); }
.guide-progress { display: flex; gap: 8px; margin-bottom: 35px; }
.guide-progress span { width: 42px; height: 3px; background: #d7e3e2; }
.guide-progress span.active { background: var(--orange); }
.question { min-height: 330px; }
.question[hidden], .guide-result[hidden] { display: none; }
.question-label { margin: 0 0 10px; color: var(--orange); font-size: .72rem; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
.question h3 { max-width: 750px; margin: 0 0 28px; font: 400 clamp(2rem, 4vw, 3.55rem)/1.03 var(--serif); letter-spacing: -.045em; }
.choice-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; }
.choice { display: flex; min-height: 70px; align-items: center; justify-content: space-between; gap: 20px; padding: 15px 18px; border: 1px solid var(--line); background: #fff; text-align: left; cursor: pointer; }
.choice:hover, .choice:focus-visible { border-color: var(--aqua-dark); background: #f6fbfb; }
.choice.selected { border-color: var(--orange); box-shadow: inset 4px 0 0 var(--orange); }
.choice span:last-child { color: var(--aqua-dark); }
.question-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 30px; }
.next, .back, .restart { min-height: 45px; padding: 10px 17px; border: 0; border-radius: 999px; font-weight: 800; cursor: pointer; }
.next { background: var(--ink); color: #fff; }
.next:disabled { cursor: not-allowed; opacity: .38; }
.back, .restart { background: transparent; color: var(--aqua-dark); }
.guide-result { min-height: 330px; }
.guide-result h3 { max-width: 760px; margin: 5px 0 18px; font: 400 clamp(2.35rem, 4.5vw, 4.2rem)/.98 var(--serif); letter-spacing: -.05em; }
.guide-result p { max-width: 650px; color: var(--ink-soft); font-size: 1.04rem; }
.result-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; margin-top: 28px; }
.no-js-note { margin-top: 18px; color: var(--ink-soft); font-size: .88rem; }

.evidence { position: relative; overflow: hidden; padding: 110px 0; background: var(--aqua); color: #fff; }
.evidence::after { content: ""; position: absolute; width: 540px; height: 540px; right: -220px; bottom: -310px; border: 1px solid rgba(255,255,255,.35); border-radius: 50%; }
.evidence .index { color: var(--sun); }
.evidence-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 8vw; }
.evidence .display { max-width: 570px; }
.facts { display: grid; grid-template-columns: 1fr 1fr; align-content: start; }
.fact { min-height: 190px; padding: 24px; border-top: 1px solid rgba(255,255,255,.35); }
.fact:nth-child(odd) { border-right: 1px solid rgba(255,255,255,.35); padding-left: 0; }
.fact strong { display: block; margin-bottom: 14px; font: 400 clamp(2.9rem, 5vw, 4.6rem)/1 var(--serif); letter-spacing: -.05em; }
.fact span { color: #e3f1f0; font-size: .88rem; }

.closing { padding: 118px 0; }
.closing-box { display: grid; grid-template-columns: 1.25fr .75fr; gap: 70px; align-items: end; padding-bottom: 72px; border-bottom: 1px solid var(--line); }
.closing .display { max-width: 850px; }
.closing-copy p { margin: 0 0 23px; color: var(--ink-soft); }
.contact-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; padding: 35px 0 0; }
.contact-list small { display: block; margin-bottom: 5px; color: var(--aqua-dark); font-size: .66rem; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.contact-list a, .contact-list span { font-size: .93rem; font-weight: 700; }

.site-footer { padding: 31px 0; background: var(--ink); color: #bdd0ce; font-size: .75rem; }
.footer-inner { display: grid; grid-template-columns: 1fr auto 1fr; gap: 25px; align-items: center; }
.footer-name { color: #fff; font-weight: 800; }
.footer-legal { justify-self: end; }
.footer-legal a:hover { color: #fff; }

@media (max-width: 900px) {
  .shell { width: min(100% - 34px, 760px); }
  .menu-toggle { display: block; position: relative; z-index: 31; }
  .nav-main { position: fixed; z-index: 30; inset: 0; display: flex; flex-direction: column; justify-content: center; gap: 25px; visibility: hidden; background: var(--ink); opacity: 0; transition: opacity .2s ease, visibility .2s ease; }
  .nav-main.open { visibility: visible; opacity: 1; }
  .nav-main > a { font: 400 2rem/1 var(--serif); }
  .nav-contact { border: 0; padding: 0; }
  .lang { margin-top: 10px; }
  .hero { min-height: 760px; }
  .hero::before { background: linear-gradient(0deg, rgba(10,38,42,.96) 0%, rgba(10,38,42,.70) 57%, rgba(10,38,42,.32) 100%), url('/assets/mercedes-arana.jpg') 65% 12% / auto 75% no-repeat; }
  .hero-inner { padding: 250px 0 65px; }
  .hero h1 { font-size: clamp(4rem, 14vw, 6rem); }
  .hero h1 span { margin-left: .32em; }
  .hero-marker { display: none; }
  .statement-grid, .section-top, .method-grid, .evidence-grid, .closing-box { grid-template-columns: 1fr; gap: 42px; }
  .statement-copy { padding-top: 0; }
  .section-top > p { max-width: 610px; }
  .method-copy { position: static; }
  .closing-copy { max-width: 500px; }
}

@media (max-width: 680px) {
  .shell { width: min(100% - 28px, 560px); }
  .brand img { width: 113px; }
  .nav { min-height: 80px; }
  .hero { min-height: 700px; }
  .hero::before { background: linear-gradient(0deg, rgba(10,38,42,.98) 0%, rgba(10,38,42,.78) 61%, rgba(10,38,42,.34) 100%), url('/assets/mercedes-arana.jpg') 58% 8% / auto 68% no-repeat; }
  .hero-inner { padding: 240px 0 44px; }
  .hero h1 { font-size: clamp(3.55rem, 17vw, 5rem); }
  .hero-lead { margin: 25px 0 24px; font-size: 1rem; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .statement, .challenges, .method, .guide, .evidence, .closing { padding: 82px 0; }
  .display { font-size: clamp(2.65rem, 13vw, 4rem); }
  .challenge-grid { grid-template-columns: 1fr; }
  .challenge, .challenge:nth-child(odd), .challenge:nth-child(even), .challenge-wide { min-height: 0; grid-template-columns: 38px 1fr auto; padding: 27px 0; border-right: 0; }
  .challenge h3 { font-size: 1.75rem; }
  .guide-card { padding: 29px 21px; }
  .question { min-height: 440px; }
  .choice-grid { grid-template-columns: 1fr; }
  .choice { min-height: 60px; }
  .facts { grid-template-columns: 1fr; }
  .fact, .fact:nth-child(odd) { min-height: 0; padding: 24px 0; border-right: 0; }
  .contact-list { grid-template-columns: 1fr; gap: 19px; }
  .footer-inner { grid-template-columns: 1fr; text-align: center; }
  .footer-legal { justify-self: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}