/* ==========================================================================
   Grupo ISIT — hoja de estilos
   Paleta tomada del logotipo: petróleo (letras) + oro oliva (isotipo).
   Sin fuentes ni recursos externos: la web no realiza peticiones a terceros.
   ========================================================================== */

:root {
  --ink: #0e3b43;          /* petróleo del logotipo */
  --ink-2: #1c5560;
  --gold: #8a8450;         /* oro oliva del isotipo */
  --gold-soft: #cfc99a;
  --gold-tint: #efedde;
  --bg: #faf8f2;           /* crema */
  --surface: #ffffff;
  --text: #1c2a2d;
  --muted: #5b6a6c;
  --line: #e4e0d2;
  --ruby: #a8253f;         /* Grantum: granada */
  --ruby-tint: #f7e8eb;
  --leaf: #4f7a4a;
  --amber: #c99a2e;        /* LuZia: luz */
  --amber-tint: #faf1dc;
  --ok: #2f6b3a;
  --err: #a8253f;

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --radius: 14px;
  --radius-lg: 22px;
  --wrap: 1120px;
  --shadow: 0 1px 2px rgba(14, 59, 67, .05), 0 8px 30px rgba(14, 59, 67, .07);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--ink-2); text-underline-offset: 3px; }
a:hover { color: var(--gold); }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 4px; }

h1, h2, h3 { font-family: var(--serif); font-weight: 500; color: var(--ink); line-height: 1.15; letter-spacing: -.01em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.3rem, 5.4vw, 4rem); }
h2 { font-size: clamp(1.9rem, 3.8vw, 2.8rem); }
h3 { font-size: 1.3rem; }
p { margin: 0 0 1em; }

.wrap { width: min(var(--wrap), 100% - 32px); margin-inline: auto; }
.section { padding: clamp(72px, 10vw, 128px) 0; }
.section--alt { background: var(--surface); border-block: 1px solid var(--line); }

.eyebrow {
  display: inline-block;
  font: 600 .78rem/1 var(--sans);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 18px;
}
.lead { font-size: clamp(1.08rem, 1.6vw, 1.25rem); color: var(--muted); max-width: 62ch; }
.center { text-align: center; }
.center .lead { margin-inline: auto; }

.skip { position: absolute; left: -9999px; top: 0; background: var(--ink); color: #fff; padding: 10px 16px; z-index: 100; }
.skip:focus { left: 16px; top: 16px; color: #fff; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 24px; border-radius: 999px;
  font: 600 .98rem/1 var(--sans); text-decoration: none;
  border: 1px solid transparent; cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, transform .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--ink); color: #fff; }
.btn--primary:hover { background: var(--ink-2); color: #fff; }
.btn--ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn--ghost:hover { border-color: var(--gold); color: var(--ink); }
.btn--ruby { background: var(--ruby); color: #fff; }
.btn--ruby:hover { background: #8e1c33; color: #fff; }
.btn--amber { background: var(--ink); color: #fff; }
.btn[disabled] { opacity: .6; cursor: wait; transform: none; }

/* ---------- Cabecera ---------- */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 248, 242, .88);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.header.is-scrolled { border-bottom-color: var(--line); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand img { height: 42px; width: auto; }
.nav ul { display: flex; gap: 34px; list-style: none; margin: 0; padding: 0; align-items: center; }
.nav a { color: var(--text); text-decoration: none; font-size: .95rem; font-weight: 500; }
.nav a:hover { color: var(--gold); }
.nav .btn { padding: 10px 20px; color: #fff; }
.nav-toggle { display: none; background: none; border: 0; padding: 10px; cursor: pointer; color: var(--ink); }
.nav-toggle span { display: block; width: 24px; height: 2px; background: currentColor; margin: 5px 0; transition: transform .25s, opacity .25s; }

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav {
    position: fixed; inset: 76px 0 auto 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 8px 16px 24px;
    transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: opacity .2s, transform .2s, visibility .2s;
  }
  .nav.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .nav li a { display: block; padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .nav li:last-child a { border: 0; margin-top: 16px; justify-content: center; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .brand img { height: 34px; }
}

/* ---------- Hero ---------- */
.hero { padding: clamp(56px, 9vw, 120px) 0 clamp(64px, 9vw, 120px); position: relative; overflow: hidden; }
.hero__grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.hero h1 em { font-style: italic; color: var(--gold); }
.hero .lead { margin-bottom: 34px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; }
.hero__art { position: relative; aspect-ratio: 1; display: grid; place-items: center; }
.hero__art::before {
  content: ""; position: absolute; inset: 6%;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 45%, var(--gold-tint), transparent 68%);
}
.hero__art img { position: relative; width: 78%; animation: float 7s ease-in-out infinite; }
.hero__ring { position: absolute; inset: 0; border: 1px dashed var(--gold-soft); border-radius: 50%; animation: spin 90s linear infinite; }
@keyframes float { 50% { transform: translateY(-10px); } }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; gap: 24px; }
  .hero__art { max-width: 320px; margin: 0 auto; order: -1; }
}

/* ---------- Propósito ---------- */
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 56px; }
.principle { padding: 32px 28px; border-radius: var(--radius-lg); background: var(--bg); border: 1px solid var(--line); }
.principle__n { font: 500 .85rem/1 var(--serif); color: var(--gold); letter-spacing: .1em; display: block; margin-bottom: 22px; }
.principle p { color: var(--muted); margin: 0; }
.statement {
  margin: 64px auto 0; max-width: 820px; text-align: center;
  font: italic 400 clamp(1.3rem, 2.4vw, 1.75rem)/1.45 var(--serif); color: var(--ink);
}
.statement::before, .statement::after { content: ""; display: block; width: 40px; height: 1px; background: var(--gold); margin: 0 auto 26px; }
.statement::after { margin: 26px auto 0; }
@media (max-width: 860px) { .principles { grid-template-columns: 1fr; } }

/* ---------- Producto (Grantum / LuZia) ---------- */
.product__head { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.product__name { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.product__name h2 { margin: 0; }
.tag {
  display: inline-block; font: 600 .72rem/1 var(--sans); letter-spacing: .1em; text-transform: uppercase;
  padding: 7px 11px; border-radius: 999px;
}
.tag--ruby { background: var(--ruby-tint); color: var(--ruby); }
.tag--amber { background: var(--amber-tint); color: #8a6512; }
.tagline { font: italic 1.25rem/1.4 var(--serif); color: var(--ruby); margin-bottom: 18px; }
.tagline--amber { color: #8a6512; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 64px; }
.feature { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px; transition: border-color .2s, box-shadow .2s; }
.section--alt .feature { background: var(--bg); }
.feature:hover { border-color: var(--gold-soft); box-shadow: var(--shadow); }
.feature__icon { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; margin-bottom: 16px; }
.feature__icon svg { width: 22px; height: 22px; }
.feature--ruby .feature__icon { background: var(--ruby-tint); color: var(--ruby); }
.feature--amber .feature__icon { background: var(--amber-tint); color: #8a6512; }
.feature h3 { font-size: 1.15rem; margin-bottom: .4em; }
.feature p { color: var(--muted); font-size: .96rem; margin: 0; }

.product__foot { margin-top: 48px; display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.product__foot small { color: var(--muted); }
.product__nota { flex-basis: 100%; margin: 0; font-size: .9rem; color: var(--muted); max-width: 60ch; }

@media (max-width: 960px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 860px) { .product__head { grid-template-columns: 1fr; gap: 40px; } }
@media (max-width: 600px) { .features { grid-template-columns: 1fr; } }

/* Maqueta de teléfono (Grantum) */
.phone {
  width: min(330px, 100%); margin-inline: auto;
  background: #fff; border-radius: 40px; padding: 14px;
  border: 1px solid var(--line); box-shadow: 0 30px 60px -20px rgba(14, 59, 67, .25);
}
.phone__screen { background: #fdf8f3; border-radius: 28px; padding: 22px 18px 20px; }
.phone__top { display: flex; justify-content: space-between; align-items: center; font-size: .78rem; color: var(--muted); margin-bottom: 18px; }
.phone__streak { background: var(--ruby-tint); color: var(--ruby); padding: 4px 9px; border-radius: 999px; font-weight: 600; }
.goal { text-align: center; margin-bottom: 18px; }
.goal svg { width: 118px; margin: 0 auto 10px; }
.goal strong { font: 500 1.15rem/1.2 var(--serif); color: var(--ink); display: block; }
.goal span { font-size: .8rem; color: var(--muted); }
.progress { height: 6px; border-radius: 999px; background: #f0e1e4; overflow: hidden; margin: 10px 0 18px; }
.progress i { display: block; height: 100%; width: 62%; background: var(--ruby); border-radius: inherit; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.steps li { display: flex; gap: 10px; align-items: center; background: #fff; border: 1px solid #efe3e3; border-radius: 12px; padding: 10px 12px; font-size: .86rem; }
.steps .dot { flex: none; width: 18px; height: 18px; border-radius: 50%; border: 2px solid #dccaca; }
.steps .done .dot { background: var(--ruby); border-color: var(--ruby); box-shadow: inset 0 0 0 3px #fff; }
.steps .done { color: var(--muted); text-decoration: line-through; text-decoration-color: #cbb; }
.coach { margin-top: 14px; display: flex; gap: 10px; align-items: flex-start; background: var(--ink); color: #eaf1f1; border-radius: 14px; padding: 12px; font-size: .82rem; line-height: 1.45; }
.coach b { color: var(--gold-soft); font-weight: 600; }
.coach__av { flex: none; width: 26px; height: 26px; border-radius: 50%; background: var(--gold-soft); display: grid; place-items: center; color: var(--ink); font: 700 .7rem/1 var(--sans); }

/* Gráfico radar (LuZia) */
.radar { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px; }
.radar svg { width: 100%; max-width: 380px; margin: 0 auto; }
.radar__legend { display: flex; justify-content: center; gap: 22px; font-size: .85rem; color: var(--muted); margin-top: 10px; }
.radar__legend i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 7px; vertical-align: -1px; }

/* ---------- Contacto ---------- */
.contact { display: grid; grid-template-columns: .8fr 1.2fr; gap: 64px; align-items: start; }
.contact__info p { color: var(--muted); }
.contact__mail { font: 500 1.3rem/1.3 var(--serif); color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--gold-soft); }
.form { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: clamp(24px, 4vw, 40px); box-shadow: var(--shadow); }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: .88rem; font-weight: 600; color: var(--ink); margin-bottom: 7px; }
.field input, .field select, .field textarea {
  width: 100%; font: inherit; font-size: 1rem; color: var(--text);
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px;
  transition: border-color .2s, background .2s;
}
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--gold); background: #fff; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: .9rem; color: var(--muted); margin: 4px 0 20px; }
.check input { margin-top: 5px; accent-color: var(--ink); width: 16px; height: 16px; flex: none; }
.hp { position: absolute !important; left: -10000px !important; width: 1px; height: 1px; overflow: hidden; }
.form__status { margin-top: 16px; font-size: .95rem; min-height: 1.5em; }
.form__status.ok { color: var(--ok); }
.form__status.err { color: var(--err); }
.form__nota { margin: 12px 0 0; font-size: .82rem; color: var(--muted); }
.infolayer { margin-top: 24px; font-size: .78rem; line-height: 1.55; color: var(--muted); border-top: 1px solid var(--line); padding-top: 16px; }
.infolayer table { border-collapse: collapse; width: 100%; }
.infolayer th { text-align: left; font-weight: 600; color: var(--ink); padding: 3px 12px 3px 0; vertical-align: top; white-space: nowrap; }
.infolayer td { padding: 3px 0; }
@media (max-width: 860px) { .contact { grid-template-columns: 1fr; gap: 36px; } }
@media (max-width: 560px) { .form__row { grid-template-columns: 1fr; gap: 0; } .infolayer th { white-space: normal; } }

/* ---------- Pie ---------- */
.footer { background: var(--ink); color: #c9d6d6; padding: 56px 0 36px; font-size: .92rem; }
.footer a { color: #e8efee; text-decoration: none; }
.footer a:hover { color: var(--gold-soft); }
.footer__top { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; padding-bottom: 32px; border-bottom: 1px solid rgba(255, 255, 255, .12); }
.footer__brand { max-width: 340px; }
.footer__brand strong { display: block; font: 500 1.5rem/1.2 var(--serif); color: #fff; letter-spacing: .01em; }
.footer__brand strong b { font-weight: 500; color: var(--gold-soft); }
.footer__brand span { display: block; color: var(--gold-soft); font-family: var(--serif); margin-top: 4px; }
.footer__cols { display: flex; gap: 56px; flex-wrap: wrap; }
.footer h4 { font: 600 .74rem/1 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--gold-soft); margin: 0 0 14px; }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.footer__bottom { padding-top: 24px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: #93aaab; font-size: .84rem; }

/* ---------- Páginas legales ---------- */
.legal { padding: clamp(48px, 7vw, 88px) 0 96px; }
.legal .wrap { max-width: 780px; }
.legal h1 { font-size: clamp(2rem, 4.5vw, 3rem); }
.legal h2 { font-size: 1.45rem; margin-top: 2.2em; }
.legal h3 { font-size: 1.1rem; margin-top: 1.6em; }
.legal p, .legal li { color: #34464a; }
.legal ul { padding-left: 1.2em; }
.legal li { margin-bottom: .4em; }
.legal .updated { color: var(--muted); font-size: .9rem; }
.legal table { width: 100%; border-collapse: collapse; font-size: .95rem; margin: 1em 0 1.6em; }
.legal th, .legal td { text-align: left; border-bottom: 1px solid var(--line); padding: 10px 12px 10px 0; vertical-align: top; }
.legal th { color: var(--ink); width: 34%; font-weight: 600; }
.back { display: inline-flex; gap: 8px; align-items: center; font-size: .92rem; margin-bottom: 28px; text-decoration: none; }

/* ---------- Animación de entrada ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }