/* Perimetra · hoja de estilos única. Sin fuentes ni recursos externos. */

:root {
  --ink: #0E1A2B;
  --slate: #3B4A5E;
  --paper: #F2F4F3;
  --raised: #FFFFFF;
  --line: #CDD5D6;
  --teal: #0B6E6A;
  --amber: #F2B705;
  --focus: #0B6E6A;
  --btn-bg: #0E1A2B;
  --btn-text: #FFFFFF;
  --btn-hover-bg: #0B6E6A;
  --btn-hover-text: #FFFFFF;
  --band: #0E1A2B;
  --band-text: #E6ECF2;
  --band-mute: #9FB0C3;
  --band-link: #7FE0D6;
  --sans: "Avenir Next", "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #E8EEF4;
    --slate: #A9B6C4;
    --paper: #0A1420;
    --raised: #111F30;
    --line: #25364A;
    --teal: #4FC3BA;
    --focus: #4FC3BA;
    --btn-bg: #E8EEF4;
    --btn-text: #0A1420;
    --btn-hover-bg: #4FC3BA;
    --btn-hover-text: #0A1420;
    --band: #060D16;
  }
}

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

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

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

a { color: var(--teal); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 2px; }

.skip {
  position: absolute; left: 16px; top: -60px; z-index: 20;
  background: var(--btn-bg); color: var(--btn-text);
  padding: 10px 16px; border-radius: 6px;
}
.skip:focus { top: 12px; }

.wrap { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: var(--sans); line-height: 1.1; letter-spacing: -0.02em; margin: 0; }
h1 { font-size: clamp(2.4rem, 5.6vw, 4.25rem); font-weight: 700; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.75rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 650; letter-spacing: -0.01em; line-height: 1.25; }
p { margin: 0; }

/* ---------- Cabecera ---------- */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px 32px; flex-wrap: wrap; min-height: 68px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--ink); text-decoration: none;
  font-size: 1.3rem; font-weight: 700; letter-spacing: -0.02em;
}
.brand svg { width: 30px; height: 30px; }
.mark-outer { stroke: var(--ink); }
.mark-inner { stroke: var(--teal); }

.nav { display: flex; align-items: center; gap: 4px 24px; overflow-x: auto; }
.nav a { color: var(--ink); text-decoration: none; font-size: 0.97rem; padding: 10px 0; white-space: nowrap; }
.nav a:hover { color: var(--teal); }
.nav .nav-cta {
  background: var(--btn-bg); color: var(--btn-text);
  padding: 9px 16px; border-radius: 6px; font-weight: 600;
}
.nav .nav-cta:hover { background: var(--btn-hover-bg); color: var(--btn-hover-text); }

.lang { display: flex; align-items: center; gap: 2px; }
.lang a {
  color: var(--ink); text-decoration: none; font-size: 0.85rem; font-weight: 600;
  letter-spacing: 0.04em; padding: 6px 9px; border-radius: 6px; border: 1px solid transparent;
}
.lang a:hover { color: var(--teal); }
.lang a[aria-current="true"] { border-color: var(--ink); }

@media (max-width: 760px) {
  .site-header .wrap { padding-top: 8px; padding-bottom: 4px; }
  .brand { order: 1; }
  .lang { order: 2; margin-left: auto; }
  .nav { order: 3; width: 100%; gap: 20px; }
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 24px; border-radius: 6px;
  font: inherit; font-weight: 600; text-decoration: none; cursor: pointer;
  background: var(--btn-bg); color: var(--btn-text); border: 2px solid var(--btn-bg);
}
.btn:hover { background: var(--btn-hover-bg); border-color: var(--btn-hover-bg); color: var(--btn-hover-text); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-ghost:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.btn-amber { background: var(--amber); border-color: var(--amber); color: #0E1A2B; }
.btn-amber:hover { background: #FFD23F; border-color: #FFD23F; color: #0E1A2B; }
.btns { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- Bloques ---------- */
.block { padding: clamp(56px, 8vw, 112px) 0; }
.block-tight { padding: clamp(40px, 5vw, 64px) 0; }

/* ---------- Hero ---------- */
.hero { padding: clamp(48px, 7vw, 96px) 0 clamp(40px, 5vw, 64px); }
.hero-grid {
  display: grid; gap: 48px; align-items: center;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
}
.hero-copy { display: flex; flex-direction: column; gap: 28px; }
.hero-copy .lede { font-size: 1.2rem; color: var(--slate); max-width: 34em; }

.hero-art { width: 100%; max-width: 440px; margin-left: auto; }
.ring { fill: none; stroke-width: 2.5; stroke-linecap: round; }
.ring-1 { stroke: var(--line); }
.ring-2 { stroke: var(--teal); }
.ring-3 { stroke: var(--ink); }
.path-in { stroke: var(--ink); stroke-width: 2; stroke-dasharray: 6 6; fill: none; }
.node { fill: var(--amber); }

@media (prefers-reduced-motion: no-preference) {
  .path-in { stroke-dasharray: 220; stroke-dashoffset: 220; animation: draw 1.4s ease-out 0.5s forwards; }
  .node { transform-box: fill-box; transform-origin: center; opacity: 0; animation: arrive 0.6s ease-out 1.7s forwards; }
}
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes arrive { from { opacity: 0; transform: scale(0.2); } to { opacity: 1; transform: scale(1); } }

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-art { margin: 0 auto; max-width: 320px; order: -1; }
}

.facts {
  list-style: none; margin: 48px 0 0; padding: 20px 0 0;
  border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: 8px 40px; color: var(--slate);
}
.facts strong { color: var(--ink); font-weight: 650; }

/* ---------- Banda RADIUS ---------- */
.band { background: var(--band); color: var(--band-text); }
.band a { color: var(--band-link); }
.band a.btn-amber { color: #0E1A2B; }
.band a.btn-amber:hover { color: #0E1A2B; }
.band-grid {
  display: grid; gap: 56px; align-items: start;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
}
.band-copy { display: flex; flex-direction: column; gap: 24px; }
.band-copy h2 { color: #FFFFFF; }
.band-copy .lede { font-size: 1.15rem; color: var(--band-text); max-width: 36em; }
.band-copy p { color: var(--band-mute); max-width: 38em; }
.band-copy h3 { color: #FFFFFF; margin-top: 8px; }
.band-copy ul, .band-copy ol { margin: 0; padding-left: 1.25rem; display: flex; flex-direction: column; gap: 10px; color: var(--band-text); max-width: 38em; }
.band-copy li::marker { color: var(--amber); font-weight: 700; }

.diagram { width: 100%; max-width: 420px; margin: 0 auto; }
.dg-box { fill: #142238; stroke: #2B3F58; stroke-width: 1.5; }
.dg-hot { fill: var(--amber); }
.dg-t { fill: #E6ECF2; font-family: var(--sans); font-size: 15px; font-weight: 650; }
.dg-s { fill: #9FB0C3; font-family: var(--sans); font-size: 13px; }
.dg-t-hot { fill: #0E1A2B; font-family: var(--sans); font-size: 15px; font-weight: 700; }
.dg-s-hot { fill: #1B2A40; font-family: var(--sans); font-size: 13px; }
.dg-line { stroke: #7FE0D6; stroke-width: 2; fill: none; }

@media (max-width: 900px) {
  .band-grid { grid-template-columns: minmax(0, 1fr); gap: 40px; }
}

/* ---------- Servicios ---------- */
.section-head { display: flex; flex-direction: column; gap: 16px; max-width: 40em; margin-bottom: 40px; }
.section-head p { color: var(--slate); font-size: 1.1rem; }

.svc {
  display: grid; gap: 12px 48px; padding: 28px 0;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.7fr);
  border-top: 1px solid var(--line);
}
.svc:last-child { border-bottom: 1px solid var(--line); }
.svc-body { display: flex; flex-direction: column; gap: 10px; max-width: 40em; }
.svc-body .deliver { color: var(--slate); font-size: 0.97rem; }
@media (max-width: 760px) { .svc { grid-template-columns: minmax(0, 1fr); } }

/* ---------- Experiencia ---------- */
.exp-grid { display: grid; gap: 56px; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; }
.exp-copy { display: flex; flex-direction: column; gap: 20px; }
.exp-copy p { color: var(--slate); max-width: 36em; }
.spec { margin: 0; display: grid; gap: 0; }
.spec div { padding: 18px 0; border-top: 1px solid var(--line); display: grid; gap: 4px; }
.spec div:last-child { border-bottom: 1px solid var(--line); }
.spec dt { color: var(--slate); font-size: 0.95rem; }
.spec dd { margin: 0; font-weight: 600; }
@media (max-width: 860px) { .exp-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; } }

/* ---------- Método ---------- */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 32px; grid-template-columns: repeat(4, minmax(0, 1fr)); counter-reset: paso; }
.steps li { counter-increment: paso; display: flex; flex-direction: column; gap: 10px; padding-top: 20px; border-top: 3px solid var(--ink); }
.steps li::before { content: counter(paso); font-size: 2rem; font-weight: 700; color: var(--teal); line-height: 1; }
.steps p { color: var(--slate); }
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .steps { grid-template-columns: minmax(0, 1fr); } }

/* ---------- Preguntas ---------- */
.faq { max-width: 52em; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 20px 0; font-weight: 600; font-size: 1.1rem; }
.faq details p { padding: 0 0 22px; color: var(--slate); max-width: 44em; }

/* ---------- Contacto ---------- */
.contact-grid { display: grid; gap: 56px; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); align-items: start; }
.contact-copy { display: flex; flex-direction: column; gap: 20px; }
.contact-copy p { color: var(--slate); }
.contact-mail { font-size: 1.15rem; font-weight: 600; word-break: break-word; }
form { display: grid; gap: 18px; }
.field { display: grid; gap: 6px; }
label { font-weight: 600; font-size: 0.97rem; }
input, select, textarea {
  font: inherit; color: var(--ink); background: var(--raised);
  border: 1.5px solid var(--line); border-radius: 6px;
  padding: 12px 14px; min-height: 48px; width: 100%;
}
textarea { min-height: 150px; resize: vertical; }
input:hover, select:hover, textarea:hover { border-color: var(--slate); }
.form-note { font-size: 0.93rem; color: var(--slate); }
@media (max-width: 860px) { .contact-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; } }

/* ---------- Pie ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0 48px; color: var(--slate); font-size: 0.95rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px 40px; align-items: center; }
.site-footer nav { display: flex; gap: 8px 24px; flex-wrap: wrap; }
.site-footer a { color: var(--slate); }

/* ---------- Páginas legales y 404 ---------- */
.legal { padding: clamp(40px, 6vw, 80px) 0; }
.legal .wrap { max-width: 780px; }
.legal h1 { font-size: clamp(2rem, 4vw, 2.75rem); margin-bottom: 28px; }
.legal h2 { font-size: 1.35rem; margin: 36px 0 10px; letter-spacing: -0.01em; }
.legal p, .legal li { color: var(--slate); max-width: 44em; }
.legal ul { padding-left: 1.2rem; display: grid; gap: 6px; margin: 10px 0; }
.legal .back { display: inline-block; margin-bottom: 24px; }
.notfound { min-height: 60vh; display: grid; align-content: center; gap: 20px; padding: 64px 0; }

.exp-list { padding-left: 1.2rem; display: grid; gap: 8px; margin: 14px 0 0; color: var(--slate); max-width: 34em; }