:root {
  --paper: #F4EFE6;
  --paper-2: #E9E1D2;
  --ink: #10201E;
  --ink-soft: #46544F;
  --accent: #F2542D;
  --sea: #0B6B66;
  --line: rgba(16, 32, 30, .16);
  --line-inv: rgba(244, 239, 230, .2);
  --display: "Bricolage Grotesque", "Helvetica Neue", Arial, sans-serif;
  --body: "Instrument Sans", "Helvetica Neue", Arial, sans-serif;
  --gutter: clamp(16px, 4vw, 40px);
  --section: clamp(64px, 10vw, 128px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { width: 100%; max-width: 1160px; margin-inline: auto; padding-inline: var(--gutter); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 14px; border-radius: 6px; z-index: 20; }
.skip:focus { left: 8px; }

h1, h2, h3 { font-family: var(--display); font-weight: 700; letter-spacing: -.02em; text-wrap: balance; }
h1 { font-size: clamp(2.6rem, 8.2vw, 6.25rem); line-height: .98; letter-spacing: -.035em; }
h2 { font-size: clamp(2rem, 4.6vw, 3.5rem); line-height: 1.04; }
h3 { font-size: clamp(1.3rem, 2.2vw, 1.7rem); line-height: 1.15; }
.eyebrow {
  font-size: .8125rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase;
  color: var(--sea); margin-bottom: 18px;
}
section { padding-block: var(--section); }

/* Botones */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 52px; padding: 0 26px; border-radius: 999px;
  font: 600 1rem/1 var(--body); text-decoration: none; cursor: pointer;
  border: 2px solid transparent; transition: transform .15s ease, background-color .15s ease, color .15s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn--accent { background: var(--accent); color: var(--ink); }
.btn--accent:hover { background: #ff6a44; }
.btn--ink { background: var(--ink); color: var(--paper); }
.btn--ghost { border-color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }
.btn--sm { min-height: 42px; padding: 0 20px; font-size: .9375rem; }

/* Navegación */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav__in { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 20px; }
.logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 700 1.45rem/1 var(--display); letter-spacing: -.03em; }
.logo svg { width: 40px; height: 24px; fill: none; stroke: var(--accent); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.nav__links { display: flex; align-items: center; gap: 28px; }
.nav__links a:not(.btn) { text-decoration: none; font-weight: 500; font-size: .9688rem; }
.nav__links a:not(.btn):hover { color: var(--accent); }
.nav__toggle { display: none; }

/* Hero */
.hero { padding-block: clamp(56px, 9vw, 112px) 0; }
.hero__lead { max-width: 40ch; margin-top: 28px; font-size: clamp(1.1rem, 1.7vw, 1.35rem); line-height: 1.5; color: var(--ink-soft); }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.rope { margin-top: clamp(24px, 5vw, 56px); padding-bottom: clamp(40px, 6vw, 72px); }
.rope svg { display: block; width: 100%; height: auto; max-height: 260px; overflow: visible; }
.rope path { fill: none; stroke: var(--accent); stroke-width: 9; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.rope__labels { display: flex; justify-content: space-between; gap: 16px; font-size: .8125rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); }

/* Nudos */
.nudos { background: var(--ink); color: var(--paper); }
.nudos .eyebrow { color: var(--accent); }
.nudos__grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: clamp(32px, 5vw, 56px); border-top: 1px solid var(--line-inv); }
.nudos__grid li {
  position: relative; padding: 28px 24px 28px 34px; font-size: 1.125rem; line-height: 1.45;
  border-bottom: 1px solid var(--line-inv);
}
.nudos__grid li::before { content: ""; position: absolute; left: 0; top: 38px; width: 16px; height: 3px; border-radius: 2px; background: var(--accent); }
.nudos__cierre { margin-top: 36px; max-width: 46ch; font: 500 clamp(1.2rem, 2vw, 1.5rem)/1.35 var(--display); color: var(--paper); }

/* Servicios */
.filas { margin-top: clamp(32px, 5vw, 56px); border-top: 2px solid var(--ink); }
.fila { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 16px 40px; padding-block: 30px; border-bottom: 1px solid var(--line); }
.fila p { color: var(--ink-soft); max-width: 58ch; }
.fila:hover h3 { color: var(--accent); }
.fila h3 { transition: color .15s ease; }

/* Método */
.metodo { background: var(--paper-2); }
.pasos { counter-reset: paso; display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; margin-top: clamp(32px, 5vw, 56px); }
.pasos li { counter-increment: paso; padding-top: 22px; border-top: 2px solid var(--ink); }
.pasos li::before { content: "0" counter(paso); display: block; font: 700 .9375rem/1 var(--display); color: var(--accent); margin-bottom: 40px; }
.pasos p { margin-top: 10px; color: var(--ink-soft); }

/* Modalidades */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: clamp(32px, 5vw, 56px); }
.panel { padding: clamp(28px, 4vw, 48px); border-radius: 20px; background: var(--ink); color: var(--paper); }
.panel--sea { background: var(--sea); }
.panel h3 { font-size: clamp(1.9rem, 3.6vw, 2.75rem); }
.panel__donde { margin: 8px 0 56px; font-weight: 600; font-size: .8125rem; letter-spacing: .1em; text-transform: uppercase; opacity: .8; }
.panel p:last-child { max-width: 42ch; }
.rubros { margin-top: 40px; max-width: 62ch; font-size: 1.125rem; color: var(--ink-soft); }

/* Preguntas */
.faq { border-top: 1px solid var(--line); }
.faq__in { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 40px; }
.faq__lista { border-top: 2px solid var(--ink); }
details { border-bottom: 1px solid var(--line); }
summary {
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
  padding: 22px 0; cursor: pointer; list-style: none;
  font: 700 1.2rem/1.25 var(--display); letter-spacing: -.01em;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; flex: none; font-size: 1.6rem; font-weight: 500; color: var(--accent); transition: transform .2s ease; }
details[open] summary::after { transform: rotate(45deg); }
details p { padding-bottom: 24px; max-width: 56ch; color: var(--ink-soft); }

/* Contacto */
.contacto { background: var(--ink); color: var(--paper); }
.contacto .eyebrow { color: var(--accent); }
.contacto__in { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: start; }
.contacto__lead { margin-top: 22px; max-width: 42ch; opacity: .85; }
.contacto__datos { margin-top: 36px; border-top: 1px solid var(--line-inv); }
.contacto__datos li { display: flex; gap: 20px; padding: 16px 0; border-bottom: 1px solid var(--line-inv); }
.contacto__datos span { flex: none; width: 92px; font-size: .8125rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; opacity: .65; padding-top: 3px; }
.contacto__datos a { color: var(--paper); text-underline-offset: 4px; overflow-wrap: anywhere; }
.contacto__datos a:hover { color: var(--accent); }

.form { display: grid; gap: 18px; padding: clamp(22px, 3.5vw, 36px); border-radius: 20px; background: var(--paper); color: var(--ink); }
.form label, .form legend { display: grid; gap: 7px; font-weight: 600; font-size: .9375rem; }
.form small { font-weight: 400; color: var(--ink-soft); font-size: inherit; }
.form input[type="text"], .form input[type="email"], .form textarea {
  width: 100%; padding: 13px 14px; border: 1.5px solid var(--line); border-radius: 10px;
  background: #fff; color: var(--ink); font: 400 1rem/1.4 var(--body);
}
.form textarea { resize: vertical; min-height: 110px; }
.form input:focus, .form textarea:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 3px rgba(242, 84, 45, .3); }
.form fieldset { border: 0; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px 20px; }
.form legend { padding: 0; margin-bottom: 8px; }
.form .radio { display: inline-flex; align-items: center; gap: 8px; font-weight: 400; font-size: 1rem; }
.form .radio input { width: 18px; height: 18px; accent-color: var(--accent); margin: 0; }
.form__error { color: #B3261E; font-weight: 600; font-size: .9375rem; }
.form__error a { color: inherit; }
.form__ok { color: var(--sea); font-weight: 600; }
.form__trampa { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form button[disabled] { opacity: .6; cursor: progress; transform: none; }

/* Pie */
.pie { background: var(--ink); color: var(--paper); border-top: 1px solid var(--line-inv); padding-block: 28px; font-size: .9375rem; }
.pie__in { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 28px; }
.pie p { opacity: .7; }

/* Aparición al hacer scroll (solo con JS) */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.is-in { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .nudos__grid { grid-template-columns: 1fr 1fr; }
  .pasos { grid-template-columns: 1fr 1fr; }
  .pasos li::before { margin-bottom: 24px; }
  .faq__in, .contacto__in { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav__toggle {
    display: inline-flex; align-items: center; min-height: 42px; padding: 0 18px;
    border: 2px solid var(--ink); border-radius: 999px; background: none; color: var(--ink);
    font: 600 .9375rem/1 var(--body); cursor: pointer;
  }
  .nav__links {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px var(--gutter) 20px; background: var(--paper); border-bottom: 1px solid var(--line);
  }
  .nav__links.is-open { display: flex; }
  .nav__links a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 1.0625rem; }
  .nav__links .btn { margin-top: 16px; }
  .fila { grid-template-columns: 1fr; padding-block: 24px; }
  .duo { grid-template-columns: 1fr; }
  .panel__donde { margin-bottom: 32px; }
  .rope path { stroke-width: 6; }
  .rope__labels { font-size: .6875rem; }
}

@media (max-width: 520px) {
  .nudos__grid, .pasos { grid-template-columns: 1fr; }
  .hero__cta .btn { flex: 1 1 100%; }
  h1 br { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .js .reveal { transition: none; }
  .js .reveal { opacity: 1; transform: none; }
}