/* Nodo FlowGo — landing. HTML/CSS/JS puro, sin librerías. */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Outfit:wght@500;600;700;800&display=swap');

:root {
  --navy-950: #070f1c;
  --navy-900: #0a1628;
  --navy-800: #0f2038;
  --navy-700: #17304f;
  --navy-600: #24426a;
  --orange: #ff7a1a;
  --orange-dark: #e66608;
  --white: #ffffff;
  --gray-50: #f4f6f9;
  --gray-100: #e5e8ee;
  --gray-300: #b4bccb;
  --gray-500: #8a94a6;
  --gray-700: #4a5568;
  --radius: 14px;
  --max: 1160px;
  --font-title: 'Outfit', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { font-family: var(--font-body); color: var(--gray-700); background: var(--white); line-height: 1.65; -webkit-font-smoothing: antialiased; }
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-title); color: var(--navy-900); line-height: 1.15; }
.container { width: min(var(--max), 100% - 40px); margin-inline: auto; }
section { padding: 96px 0; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }

/* Botones */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 26px; border-radius: 999px; font-weight: 600; font-size: .98rem; transition: background .2s, transform .2s, border-color .2s, color .2s; }
.btn-primary { background: var(--orange); color: var(--white); }
.btn-primary:hover { background: var(--orange-dark); transform: translateY(-2px); }
.btn-ghost { border: 1.5px solid rgba(255,255,255,.35); color: var(--white); }
.btn-ghost:hover { border-color: var(--white); transform: translateY(-2px); }
.btn-dark { background: var(--navy-900); color: var(--white); }
.btn-dark:hover { background: var(--navy-700); transform: translateY(-2px); }

/* Header */
.site-header { position: fixed; inset: 0 0 auto 0; z-index: 50; transition: background .3s, border-color .3s; border-bottom: 1px solid transparent; }
.site-header.scrolled { background: var(--navy-900); border-color: rgba(255,255,255,.08); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--white); font-family: var(--font-title); font-weight: 700; font-size: 1.25rem; letter-spacing: .02em; }
.brand img { width: 36px; height: 36px; object-fit: contain; }
.brand b { color: var(--orange); font-weight: 700; }
.nav-links { display: flex; gap: 28px; margin-left: auto; margin-right: 28px; }
.nav-links a { color: var(--gray-300); font-size: .93rem; font-weight: 500; transition: color .2s; }
.nav-links a:hover { color: var(--white); }

.solutions-menu { position: relative; }
.solutions-toggle { background: var(--orange); color: var(--white); padding: 11px 22px; border-radius: 999px; font-weight: 600; display: inline-flex; align-items: center; gap: 8px; transition: background .2s; }
.solutions-toggle:hover { background: var(--orange-dark); }
.solutions-toggle svg { width: 14px; height: 14px; transition: transform .25s; }
.solutions-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }
.solutions-panel { position: absolute; right: 0; top: calc(100% + 12px); width: 340px; background: var(--white); border-radius: var(--radius); padding: 8px; border: 1px solid var(--gray-100); opacity: 0; visibility: hidden; transform: translateY(-8px); transition: opacity .2s, transform .2s, visibility .2s; }
.solutions-panel.open { opacity: 1; visibility: visible; transform: none; }
.solutions-panel a { display: flex; align-items: center; gap: 14px; padding: 14px; border-radius: 10px; transition: background .2s; }
.solutions-panel a:hover { background: var(--gray-50); }
.sol-ico { flex: none; width: 42px; height: 42px; border-radius: 10px; background: var(--navy-800); color: var(--orange); display: grid; place-items: center; }
.sol-ico svg { width: 22px; height: 22px; }
.sol-txt strong { display: block; font-family: var(--font-title); color: var(--navy-900); font-size: 1.02rem; }
.sol-txt span { font-size: .84rem; color: var(--gray-500); line-height: 1.35; display: block; }
.tag-soon { margin-left: auto; font-size: .68rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--gray-500); border: 1px solid var(--gray-100); padding: 3px 8px; border-radius: 999px; white-space: nowrap; }
.menu-btn { display: none; color: var(--white); width: 42px; height: 42px; margin-right: 8px; }
.menu-btn svg { width: 26px; height: 26px; margin: auto; }

/* Hero */
.hero { position: relative; background: var(--navy-900); color: var(--white); padding: 170px 0 110px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-block; color: var(--orange); font-weight: 600; font-size: .82rem; letter-spacing: .16em; text-transform: uppercase; margin-bottom: 18px; }
.hero h1 { color: var(--white); font-size: clamp(2.2rem, 5vw, 3.9rem); font-weight: 800; letter-spacing: -.01em; }
.hero h1 em { font-style: normal; color: var(--orange); }
.hero p.lead { margin-top: 22px; font-size: 1.15rem; color: var(--gray-300); max-width: 560px; }
.hero-cta { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 14px; }
.hero-meta { margin-top: 44px; display: flex; flex-wrap: wrap; gap: 28px; color: var(--gray-500); font-size: .88rem; }
.hero-meta span::before { content: ""; display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--orange); margin-right: 8px; }
.node-net { width: 100%; max-width: 480px; margin-inline: auto; }
.node-net .line { stroke: var(--navy-600); stroke-width: 1.5; fill: none; }
.node-net .pulse { stroke: var(--orange); stroke-width: 2; fill: none; stroke-dasharray: 8 120; animation: flow 3.2s linear infinite; }
.node-net .pulse:nth-of-type(2n) { animation-delay: -1.2s; }
.node-net .dot { fill: var(--navy-700); stroke: var(--navy-600); stroke-width: 1.5; }
.node-net .core { fill: var(--orange); }
.node-net text { fill: var(--gray-300); font-family: var(--font-title); font-size: 13px; text-anchor: middle; }
@keyframes flow { to { stroke-dashoffset: -256; } }

/* Encabezados de sección */
.section-head { max-width: 700px; margin-bottom: 52px; }
.section-head h2 { font-size: clamp(1.8rem, 3.6vw, 2.7rem); font-weight: 700; }
.section-head p { margin-top: 14px; font-size: 1.05rem; }
.section-head .eyebrow { margin-bottom: 12px; }

/* NODO */
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card { background: var(--white); border: 1px solid var(--gray-100); border-radius: var(--radius); padding: 28px; transition: transform .25s, border-color .25s; }
.card:hover { transform: translateY(-4px); border-color: var(--orange); }
.card .num { font-family: var(--font-title); font-weight: 800; font-size: .9rem; color: var(--orange); letter-spacing: .1em; }
.card h3 { margin: 10px 0; font-size: 1.3rem; }
.card p { font-size: .95rem; }

/* FlowGo */
.flowgo { background: var(--gray-50); }
.flow-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 40px; }
.flow-box { background: var(--navy-900); color: var(--gray-300); border-radius: var(--radius); padding: 36px; }
.flow-box h3 { color: var(--white); font-size: 1.6rem; margin-bottom: 10px; }
.flow-box h3 span { color: var(--orange); }
.pipelines { display: grid; gap: 16px; }
.pipeline { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; background: var(--white); border: 1px solid var(--gray-100); border-radius: var(--radius); padding: 18px 22px; }
.pipeline .step { background: var(--navy-800); color: var(--white); padding: 8px 16px; border-radius: 999px; font-size: .9rem; font-weight: 500; }
.pipeline .step.last { background: var(--orange); }
.pipeline .arrow { color: var(--orange); font-weight: 700; }

/* Filosofía */
.phil-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.phil { display: flex; gap: 20px; padding: 26px; border-left: 4px solid var(--orange); background: var(--gray-50); border-radius: 0 var(--radius) var(--radius) 0; }
.phil h3 { font-size: 1.2rem; margin-bottom: 6px; }
.phil p { font-size: .95rem; }

/* Soluciones */
.solutions { background: var(--navy-900); }
.solutions .section-head h2 { color: var(--white); }
.solutions .section-head p { color: var(--gray-300); }
.sol-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.sol-card { background: var(--navy-800); border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius); padding: 34px 30px; display: flex; flex-direction: column; color: var(--gray-300); transition: transform .25s, border-color .25s; }
.sol-card:hover { transform: translateY(-5px); border-color: var(--orange); }
.sol-card .sol-ico { width: 54px; height: 54px; background: var(--navy-700); margin-bottom: 22px; }
.sol-card .sol-ico svg { width: 28px; height: 28px; }
.sol-card h3 { color: var(--white); font-size: 1.7rem; }
.sol-card h3 b { color: var(--orange); }
.sol-card .concept { font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .1em; color: var(--gray-500); margin: 6px 0 16px; }
.sol-card .key { font-size: .88rem; border-left: 3px solid var(--orange); padding-left: 12px; margin-bottom: 14px; color: var(--gray-300); }
.sol-card p.desc { font-size: .95rem; margin-bottom: 18px; }
.sol-card .slogan { margin-top: auto; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.1); font-style: italic; color: var(--white); font-size: .95rem; }
.sol-card .btn { margin-top: 22px; justify-content: center; }

/* Conexión */
.connect-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.connect-grid p + p { margin-top: 16px; }
.layers { display: grid; gap: 12px; }
.layer { border-radius: var(--radius); padding: 22px 26px; font-family: var(--font-title); }
.layer small { display: block; font-family: var(--font-body); font-size: .85rem; opacity: .8; margin-top: 4px; }
.layer strong { font-size: 1.2rem; }
.layer.l-top { background: var(--orange); color: var(--white); }
.layer.l-mid { background: var(--navy-700); color: var(--white); margin-inline: 22px; }
.layer.l-base { background: var(--navy-900); color: var(--white); margin-inline: 44px; }

/* Contacto */
.contact { background: var(--gray-50); }
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; align-items: start; }
.form { background: var(--white); border: 1px solid var(--gray-100); border-radius: var(--radius); padding: 32px; display: grid; gap: 16px; }
.field label { display: block; font-size: .85rem; font-weight: 600; color: var(--navy-900); margin-bottom: 6px; }
.field input, .field select, .field textarea { width: 100%; padding: 12px 14px; border: 1.5px solid var(--gray-100); border-radius: 10px; font: inherit; color: var(--navy-900); background: var(--white); transition: border-color .2s; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--orange); }
.field textarea { min-height: 120px; resize: vertical; }
.captcha-row { display: flex; gap: 12px; align-items: center; }
.captcha-code { font-family: var(--font-title); font-weight: 800; font-size: 1.5rem; letter-spacing: .3em; background: var(--navy-900); color: var(--orange); padding: 8px 18px; border-radius: 10px; user-select: none; }
.captcha-refresh { color: var(--gray-500); font-size: .85rem; text-decoration: underline; }
.form-msg { font-size: .92rem; font-weight: 500; display: none; }
.form-msg.ok { display: block; color: #1a7f4b; }
.form-msg.err { display: block; color: #c0392b; }

/* Footer */
.site-footer { background: var(--navy-950); color: var(--gray-500); padding: 64px 0 28px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; padding-bottom: 36px; border-bottom: 1px solid rgba(255,255,255,.08); }
.site-footer h4 { color: var(--white); font-size: 1.05rem; margin-bottom: 12px; }
.site-footer p { font-size: .93rem; }
.site-footer a.ext { color: var(--orange); font-weight: 600; }
.site-footer a.ext:hover { text-decoration: underline; }
.foot-bottom { padding-top: 22px; font-size: .84rem; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }

/* Modal (solo oscurecimiento, sin blur) */
.modal { position: fixed; inset: 0; z-index: 100; background: rgba(5,10,20,.78); display: grid; place-items: center; padding: 20px; opacity: 0; visibility: hidden; transition: opacity .25s, visibility .25s; }
.modal.open { opacity: 1; visibility: visible; }
.modal-box { background: var(--white); border-radius: var(--radius); padding: 38px; max-width: 440px; width: 100%; text-align: center; transform: translateY(14px); transition: transform .25s; }
.modal.open .modal-box { transform: none; }
.modal-box h3 { font-size: 1.6rem; margin-bottom: 10px; }
.modal-box h3 b { color: var(--orange); }
.modal-box p { margin-bottom: 24px; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s, transform .7s; }
.reveal.in { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 1000px) {
  .cards-4 { grid-template-columns: repeat(2, 1fr); }
  .sol-grid { grid-template-columns: 1fr; }
  .hero-grid, .connect-grid, .contact-grid, .foot-grid { grid-template-columns: 1fr; }
  .node-net { max-width: 360px; }
}
@media (max-width: 820px) {
  .menu-btn { display: flex; margin-left: auto; }
  .nav-links { position: fixed; inset: 72px 0 auto 0; background: var(--navy-900); flex-direction: column; gap: 0; margin: 0; padding: 8px 20px 20px; border-bottom: 1px solid rgba(255,255,255,.08); transform: translateY(-120%); transition: transform .3s; z-index: -1; }
  .nav-links.open { transform: none; }
  .nav-links a { padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.06); }
  .solutions-menu { position: static; }
  .solutions-panel { right: 12px; left: 12px; width: auto; }
}
@media (max-width: 640px) {
  section { padding: 68px 0; }
  .hero { padding: 130px 0 70px; }
  .cards-4, .flow-grid, .phil-grid { grid-template-columns: 1fr; }
  .form { padding: 22px; }
  .solutions-toggle { padding: 10px 16px; font-size: .9rem; }
  .brand span.word { font-size: 1.05rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}