/* NATHAN OHS · portal. Colores de la marca: azul (escudo) → verde (check). */
:root {
  --navy-900: #071634;
  --navy-800: #0b1f4d;
  --navy-700: #12306e;
  --blue: #1f5fbf;
  --blue-600: #1a4fa0;
  --green: #3aa14a;
  --green-500: #45b556;
  --orange: #f07c1e;
  --red: #d9443a;
  --amber: #e5a521;

  --bg: #f5f8fc;
  --bg-alt: #eaf0f8;
  --surface: #ffffff;
  --text: #0f1d3a;
  --muted: #51607d;
  --line: #d9e2ef;
  --shadow: 0 10px 30px -12px rgba(11, 31, 77, .25);
  --radius: 16px;
  --grad: linear-gradient(100deg, var(--blue) 0%, #2c86a8 50%, var(--green) 100%);
  --font: "Inter", "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #081229;
    --bg-alt: #0b1834;
    --surface: #0f1f40;
    --text: #e8eefb;
    --muted: #a3b2cf;
    --line: #1e3260;
    --shadow: 0 10px 30px -12px rgba(0, 0, 0, .6);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
p { margin: 0 0 1em; }

.wrap { width: min(1180px, 100% - 32px); margin-inline: auto; }
.ic { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--green-500); outline-offset: 2px; border-radius: 6px; }

/* Botones */
.btn {
  display: inline-flex; align-items: center; gap: .5em;
  font: 600 1rem/1 var(--font); text-decoration: none;
  padding: .8em 1.2em; border-radius: 999px; border: 1.5px solid transparent;
  cursor: pointer; transition: transform .15s, box-shadow .15s, background .15s;
}
.btn .ic { width: 18px; height: 18px; }
.btn:hover { transform: translateY(-1px); }
.btn-sm { font-size: .9rem; padding: .6em 1em; }
.btn-lg { font-size: 1.05rem; padding: .95em 1.5em; }
.btn-primary { background: var(--orange); color: #fff; box-shadow: 0 8px 20px -8px rgba(240, 124, 30, .7); }
.btn-primary:hover { background: #e06d10; box-shadow: 0 12px 24px -8px rgba(240, 124, 30, .8); }
.btn-ghost { border-color: rgba(255, 255, 255, .45); color: #fff; }
.btn-ghost:hover { background: rgba(255, 255, 255, .1); }
.btn-light { background: #fff; color: var(--navy-800); }

/* Barra superior */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7, 22, 52, .82); backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  color: #fff; transition: background .2s;
}
.topbar.is-scrolled { background: rgba(7, 22, 52, .96); }
.topbar-in { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand img { border-radius: 8px; background: #fff; padding: 2px; }
.brand-txt { font-size: 1.2rem; display: flex; gap: 6px; }
.brand-ohs { font-weight: 800; color: var(--green-500); }
.nav { display: flex; gap: 22px; margin-left: auto; }
.nav a { text-decoration: none; font-size: .95rem; color: #cfdaf0; }
.nav a:hover { color: #fff; }
.menu-btn { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.menu-btn span { display: block; width: 22px; height: 2px; background: #fff; margin: 5px 0; border-radius: 2px; transition: .2s; }

/* Hero */
.hero { position: relative; color: #fff; overflow: hidden; padding: 72px 0 40px; background: var(--navy-900); }
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(900px 500px at 85% 10%, rgba(58, 161, 74, .35), transparent 60%),
    radial-gradient(800px 600px at 10% 90%, rgba(31, 95, 191, .45), transparent 60%),
    linear-gradient(160deg, var(--navy-900), var(--navy-700));
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, #000 30%, transparent 95%);
}
.hero-in { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.eyebrow { text-transform: uppercase; letter-spacing: .14em; font-size: .78rem; font-weight: 700; color: var(--green-500); margin-bottom: .8em; }
.hero h1 { font-size: clamp(2.3rem, 5vw, 3.8rem); font-weight: 800; }
.grad { background: linear-gradient(90deg, #6fb4ff, #6fdc7e); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: 1.12rem; color: #d3ddf1; max-width: 60ch; }
.lead strong { color: #fff; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 12px; }
.hero-note { font-size: .85rem; color: #9fb0d2; }

.hero-card {
  background: rgba(255, 255, 255, .07); border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 20px; padding: 18px; backdrop-filter: blur(6px);
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, .6);
  transform: perspective(1200px) rotateY(-6deg) rotateX(3deg);
}
.hc-head { display: flex; align-items: center; gap: 6px; margin-bottom: 14px; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.r { background: #ff6159; } .dot.y { background: #ffbd2e; } .dot.g { background: #28c941; }
.hc-title { margin-left: 8px; font-size: .82rem; color: #b9c7e3; }
.hc-kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.kpi { background: rgba(7, 22, 52, .6); border: 1px solid rgba(255,255,255,.08); border-radius: 12px; padding: 12px; display: flex; flex-direction: column; }
.kpi-n { font-size: 1.6rem; font-weight: 800; }
.kpi-n.ok { color: #6fdc7e; } .kpi-n.warn { color: #ffc35c; }
.kpi-l { font-size: .72rem; color: #9fb0d2; }
.hc-bars { display: flex; align-items: flex-end; gap: 8px; height: 90px; margin: 16px 4px; }
.hc-bars span { flex: 1; height: var(--h); border-radius: 6px 6px 2px 2px; background: linear-gradient(to top, var(--blue), var(--green-500)); opacity: .9; animation: grow 1s ease-out both; }
@keyframes grow { from { height: 0; } }
.hc-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; font-size: .85rem; color: #dbe4f5; }
.hc-list li { display: flex; align-items: center; gap: 10px; background: rgba(7,22,52,.5); border-radius: 10px; padding: 8px 10px; }
.chip { font-size: .66rem; font-weight: 700; letter-spacing: .04em; padding: 3px 8px; border-radius: 999px; border: 1px solid; white-space: nowrap; }
.chip.crit { color: #ff8a80; border-color: #ff8a80; background: rgba(217,68,58,.15); }
.chip.prog { color: #ffc35c; border-color: #ffc35c; background: rgba(229,165,33,.15); }
.chip.done { color: #6fdc7e; border-color: #6fdc7e; background: rgba(58,161,74,.15); }
.hc-foot { font-size: .7rem; color: #7f90b4; text-align: right; margin: 10px 0 0; }

.pillars { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 56px; }
.pillar { display: flex; gap: 14px; align-items: center; padding: 16px 18px; border-radius: 14px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); }
.pillar .ic { width: 34px; height: 34px; color: var(--green-500); }
.pillar strong { display: block; text-transform: uppercase; letter-spacing: .1em; font-size: .85rem; }
.pillar span { font-size: .88rem; color: #b9c7e3; }

/* Secciones */
.sec { padding: 88px 0; }
.sec-alt { background: var(--bg-alt); }
.sec-head { max-width: 760px; margin-bottom: 44px; }
.sec-head h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); font-weight: 800; }
.sec-lead { color: var(--muted); font-size: 1.06rem; }
.eyebrow { color: var(--green); }
.hero .eyebrow, .sec-dark .eyebrow { color: var(--green-500); }

/* Beneficios */
.benefits { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.benefit { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); transition: transform .2s; }
.benefit:hover { transform: translateY(-3px); }
.benefit h3 { font-size: 1.12rem; }
.benefit p { color: var(--muted); margin: 0; }
.b-ic { display: inline-grid; place-items: center; width: 48px; height: 48px; border-radius: 14px; background: var(--grad); color: #fff; margin-bottom: 16px; }

/* Módulos */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.f-btn { font: 600 .9rem var(--font); padding: .55em 1.1em; border-radius: 999px; border: 1.5px solid var(--line); background: var(--surface); color: var(--muted); cursor: pointer; }
.f-btn.is-on { background: var(--navy-800); border-color: var(--navy-800); color: #fff; }
.modules { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); gap: 16px; }
.mod { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 20px; position: relative; overflow: hidden; transition: transform .2s, border-color .2s, opacity .25s; }
.mod::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; background: var(--grad); transform: scaleX(0); transform-origin: left; transition: transform .3s; }
.mod:hover { transform: translateY(-3px); border-color: var(--blue); }
.mod:hover::before { transform: scaleX(1); }
.mod .ic { width: 30px; height: 30px; color: var(--blue); margin-bottom: 10px; }
.mod h3 { font-size: 1.02rem; margin-bottom: .35em; }
.mod p { font-size: .92rem; color: var(--muted); margin: 0; }
.mod[hidden] { display: none; }
/* Vista de ejemplo (datos de prueba) arriba de cada módulo, a sangre. */
.mod-shot { display: block; width: calc(100% + 40px); max-width: none; height: auto; aspect-ratio: 8 / 5;
  margin: -20px -20px 16px; border-bottom: 1px solid var(--line); background: #0f1525; }
.mod:hover .mod-shot { filter: brightness(1.06); }
@media (prefers-color-scheme: dark) { .mod .ic { color: #6fb4ff; } .f-btn.is-on { background: var(--blue); border-color: var(--blue); } }

/* Flujo */
.flow { list-style: none; padding: 0; margin: 0 0 48px; display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; counter-reset: s; position: relative; }
.flow::before { content: ""; position: absolute; top: 26px; left: 10%; right: 10%; height: 3px; background: var(--grad); border-radius: 3px; opacity: .5; }
.step { position: relative; text-align: center; padding: 0 6px; }
.step-n { position: relative; display: inline-grid; place-items: center; width: 54px; height: 54px; border-radius: 50%; background: var(--surface); border: 3px solid var(--blue); color: var(--blue); font-weight: 800; font-size: 1.2rem; margin-bottom: 14px; box-shadow: var(--shadow); }
.step:last-child .step-n { border-color: var(--green); color: var(--green); }
.step h3 { font-size: 1.05rem; }
.step p { font-size: .92rem; color: var(--muted); }
.roles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.role { border-left: 4px solid var(--green); background: var(--surface); padding: 16px 18px; border-radius: 0 12px 12px 0; box-shadow: var(--shadow); }
.role strong { display: block; margin-bottom: 4px; }
.role span { font-size: .9rem; color: var(--muted); }

/* Normativa */
.sec-dark { background: linear-gradient(160deg, var(--navy-900), var(--navy-800)); color: #fff; }
.sec-dark .sec-lead { color: #b9c7e3; }
.laws { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: start; }
.law { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12); border-radius: 14px; transition: background .2s; }
.law[open] { background: rgba(255,255,255,.09); border-color: rgba(111,220,126,.45); }
.law summary { list-style: none; cursor: pointer; padding: 18px 48px 18px 20px; position: relative; display: grid; grid-template-columns: auto 1fr; gap: 2px 12px; align-items: center; }
.law summary::-webkit-details-marker { display: none; }
.law summary::after { content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%); font-size: 1.5rem; color: var(--green-500); transition: transform .2s; }
.law[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.law-tag { grid-row: span 2; align-self: start; font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; padding: 4px 8px; border-radius: 6px; background: rgba(31,95,191,.4); color: #cfe2ff; }
.law-name { font-weight: 800; font-size: 1.05rem; }
.law-desc { font-size: .9rem; color: #b9c7e3; }
.law-body { padding: 0 20px 18px; color: #d3ddf1; font-size: .95rem; }
.law-ohs { display: flex; gap: 10px; background: rgba(58,161,74,.14); border: 1px solid rgba(111,220,126,.3); padding: 12px; border-radius: 10px; color: #e3f6e6; margin: 0; }
.law-ohs .ic { color: #6fdc7e; width: 20px; height: 20px; margin-top: 2px; }

/* Estándares */
.stds { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.std { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.std-code { display: inline-block; font-weight: 800; font-size: .85rem; color: #fff; background: var(--grad); padding: 5px 12px; border-radius: 999px; margin-bottom: 14px; }
.std h3 { font-size: 1.08rem; }
.std ul { margin: 0; padding-left: 1.1em; color: var(--muted); font-size: .92rem; }
.std li { margin-bottom: 4px; }
.pdca { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 40px; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.pdca-item { padding: 22px; color: #fff; }
.pdca-item strong { display: block; font-size: 1.1rem; margin-bottom: 6px; }
.pdca-item span { font-size: .9rem; opacity: .9; }
.pdca-item:nth-child(1) { background: var(--navy-700); }
.pdca-item:nth-child(2) { background: var(--blue-600); }
.pdca-item:nth-child(3) { background: #1f7f8c; }
.pdca-item:nth-child(4) { background: var(--green); }

/* CTA y pie */
.cta { background: var(--grad); color: #fff; padding: 56px 0; }
.cta-in { display: flex; align-items: center; gap: 28px; }
.cta-in img { background: #fff; border-radius: 18px; padding: 6px; }
.cta-in > div { flex: 1; }
.cta h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800; }
.cta p { margin: 0; opacity: .92; }
.foot { background: var(--navy-900); color: #b9c7e3; padding: 36px 0; font-size: .88rem; }
.foot-in { display: grid; gap: 14px; }
.foot-brand { display: flex; align-items: center; gap: 10px; color: #fff; }
.foot-brand img { background: #fff; border-radius: 6px; padding: 2px; }
.foot-note { max-width: 90ch; margin: 0; }
.foot-note a { color: #6fdc7e; }
.foot-copy { margin: 0; color: #7f90b4; }
.foot-copy a { color: #6fdc7e; }

/* Aparición al hacer scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hc-bars span { animation: none; }
  .hero-card { transform: none; }
}

/* Responsivo */
@media (max-width: 1000px) {
  .hero-in { grid-template-columns: 1fr; }
  .hero-card { transform: none; max-width: 520px; }
  .benefits, .stds { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: 1fr; gap: 20px; }
  .flow::before { top: 10px; bottom: 10px; left: 26px; right: auto; width: 3px; height: auto; }
  .step { display: grid; grid-template-columns: 54px 1fr; gap: 0 16px; text-align: left; padding: 0; }
  .step-n { grid-row: span 2; margin: 0; }
  .roles, .pdca { grid-template-columns: 1fr 1fr; }
  .laws { grid-template-columns: 1fr; }
}
@media (max-width: 820px) {
  .menu-btn { display: block; margin-left: auto; }
  .topbar .btn-sm { display: none; }
  .nav {
    position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: var(--navy-900); border-bottom: 1px solid rgba(255,255,255,.1);
    max-height: 0; overflow: hidden; transition: max-height .25s;
  }
  .nav a { padding: 14px 16px; border-top: 1px solid rgba(255,255,255,.06); }
  .nav.is-open { max-height: 320px; }
  .menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .pillars { grid-template-columns: 1fr; margin-top: 40px; }
  .cta-in { flex-direction: column; text-align: center; }
}
@media (max-width: 600px) {
  .hero { padding-top: 48px; }
  .sec { padding: 64px 0; }
  .benefits, .stds, .roles, .pdca { grid-template-columns: 1fr; }
  .hc-kpis { grid-template-columns: 1fr 1fr 1fr; }
  .kpi-n { font-size: 1.25rem; }
  .hero-cta .btn { width: 100%; justify-content: center; }
}