/* NexLink Hub — static landing
   Palette matches the Flutter theme and the live screenshots:
   carbon navy background, electric blue / cyan accents, Inter + Space Grotesk. */

:root {
  --bg-0: #080c14;
  --bg-1: #0d1220;
  --bg-2: #131929;
  --bg-3: #1a2235;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(148, 176, 214, 0.18);
  --text: #f0f4ff;
  --muted: #94a3c0;
  --faint: #5a6a85;
  --cyan: #22d3ee;
  --cyan-deep: #00d4ff;
  --indigo: #4f46e5;
  --blue: #3b82f6;
  --success: #10b981;
  --danger: #f87171;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --container: 1120px;
  --header: 72px;
  --radius: 16px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
  color-scheme: dark;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg-0);
  text-rendering: optimizeLegibility;
}

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

a { color: var(--cyan); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #67e8f9; }

button, input, select, textarea { font: inherit; color: inherit; }

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

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 100;
  padding: 8px 12px;
  background: var(--text);
  color: var(--bg-0);
  border-radius: 8px;
}
.skip-link:focus { top: 12px; }

.container {
  width: min(var(--container), calc(100% - 48px));
  margin-inline: auto;
}

.gradient-text {
  background-image: linear-gradient(100deg, #4f46e5 0%, #3b82f6 46%, #00d4ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(8, 12, 20, 0.78);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled { border-bottom-color: rgba(255, 255, 255, 0.06); }

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  width: min(1180px, calc(100% - 40px));
  height: var(--header);
  margin-inline: auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
}
.logo img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  box-shadow: 0 6px 18px rgba(79, 70, 229, 0.35);
}
.logo__brand {
  display: block;
  font-family: var(--display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.4px;
  line-height: 1.05;
}
.logo__sub {
  display: block;
  margin-top: 1px;
  color: var(--cyan);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.7px;
  line-height: 1;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav__links a {
  color: #c5d0e4;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
}
.nav__links a:hover { color: var(--text); }
.nav--legal { height: auto; min-height: var(--header); padding-block: 10px; flex-wrap: wrap; }
.nav--legal .nav__links a[aria-current="page"] { color: var(--cyan); }

.lang {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.4px;
}
.lang a {
  color: #8ea0bb;
  text-decoration: none;
}
.lang a[aria-current="true"] { color: var(--cyan); }
.lang a:hover { color: var(--text); }

.nav__toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  background: transparent;
  padding: 0;
  cursor: pointer;
}
.nav__toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  margin: 4px auto;
  background: var(--text);
}

.mobile-menu {
  display: none;
  border-top: 1px solid var(--border);
  background: rgba(8, 12, 20, 0.96);
  padding: 8px 20px 18px;
}
.mobile-menu a {
  display: block;
  padding: 12px 4px;
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
}
.site-header.is-open .mobile-menu { display: block; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.1px;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease;
}
.btn svg { width: 18px; height: 18px; flex: none; }
.btn--primary {
  color: #fff;
  border: 0;
  background: linear-gradient(90deg, #4f6dff 0%, #2ea7ff 58%, #22d3ee 100%);
  box-shadow: none;
}
.btn--primary:hover { color: #fff; transform: translateY(-1px); filter: brightness(1.06); }
.btn--ghost {
  color: #d5deee;
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.1);
}
.btn--ghost:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }
.btn--outline {
  color: #d5deee;
  background: transparent;
  border-color: rgba(255, 255, 255, 0.16);
  min-height: 40px;
  padding-inline: 16px;
}
.btn--outline:hover { color: var(--cyan); border-color: rgba(34, 211, 238, 0.55); }
.btn--lg { min-height: 52px; padding-inline: 22px; font-size: 16px; border-radius: 14px; }

/* Hero */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 92px 0 88px;
  text-align: center;
  background:
    radial-gradient(520px 320px at 12% 18%, rgba(79, 70, 229, 0.18), transparent 70%),
    radial-gradient(420px 280px at 92% 88%, rgba(0, 212, 255, 0.1), transparent 70%),
    var(--bg-0);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(148, 176, 214, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 176, 214, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 78%);
}
.hero__title {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2.8rem, 6.4vw, 4.75rem);
  font-weight: 700;
  letter-spacing: -2.2px;
  line-height: 0.98;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 28px 0 0;
  padding: 6px 12px 6px 10px;
  border: 1px solid rgba(34, 211, 238, 0.28);
  border-radius: 999px;
  background: rgba(8, 20, 32, 0.7);
  color: #d7e7f5;
  font-size: 13px;
  font-weight: 500;
}
.badge__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.12);
}
.hero__lead {
  margin: 36px 0 0;
  font-family: var(--display);
  font-size: clamp(2.15rem, 4.8vw, 4rem);
  font-weight: 700;
  letter-spacing: -1.8px;
  line-height: 1.08;
}
.hero__lead span { display: block; }
.hero__subtitle {
  max-width: 640px;
  min-height: 5.6em;
  margin: 28px auto 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}
.hero__subtitle strong { color: var(--text); font-weight: 650; }
.hero__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}
.stats {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 0;
  margin: 72px 0 0;
  padding: 0;
  list-style: none;
}
.stats li {
  min-width: 180px;
  padding: 0 36px;
  position: relative;
}
.stats li + li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, transparent, #4f46e5 30%, #00d4ff 70%, transparent);
}
.stats strong {
  display: block;
  font-family: var(--display);
  font-size: clamp(2.6rem, 4vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1;
}
.stats span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 15px;
}

/* Sections */
.section { padding: 96px 0; }
.section--tight { padding-top: 24px; }
.eyebrow {
  display: inline-flex;
  margin: 0 0 16px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(0, 212, 255, 0.1);
  color: var(--cyan);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}
.section h2 {
  margin: 0;
  max-width: 680px;
  font-family: var(--display);
  font-size: clamp(1.8rem, 3vw, 2.45rem);
  font-weight: 700;
  letter-spacing: -0.8px;
  line-height: 1.15;
}
.section__intro {
  max-width: 640px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 16.5px;
}
.center { text-align: center; }
.center .section__intro, .center h2 { margin-inline: auto; }

.grid-2, .grid-3, .models {
  display: grid;
  gap: 18px;
  margin-top: 48px;
}
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.models { grid-template-columns: 1fr 1fr; align-items: stretch; }

.card {
  background: linear-gradient(180deg, rgba(26, 34, 53, 0.92), rgba(16, 23, 38, 0.92));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px 26px;
  box-shadow: var(--shadow);
}
.card h3 {
  margin: 10px 0 8px;
  font-size: 18px;
  letter-spacing: -0.2px;
}
.card p { margin: 0; color: var(--muted); font-size: 14.5px; line-height: 1.65; }
.card p.eyebrow { 
    margin: -32px -30px 0 -30px !important;
    padding: 16px 30px;
    border-radius: 15px 15px 0 0;
    font-size: 16.5px; 
}
.section-sep {
  height: 1px;
  margin: 0;
  border: 0;
  background: linear-gradient(90deg, transparent, #4f46e5 20%, #00d4ff 50%, #3b82f6 80%, transparent);
}
#proceso .step__num {
  margin: 0 0 12px;
  font-family: var(--display);
  font-size: clamp(2rem, 7vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -2px;
  line-height: 0.9;
}
.card:hover {
  border-color: rgba(0, 212, 255, 0.55);
  box-shadow: 0 0 0 1px rgba(0, 180, 255, 0.18), 0 18px 48px rgba(0, 168, 255, 0.28);
}
.icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.16);
}
.icon svg { width: 20px; height: 20px; }
.note {
  margin: 18px 0 0;
  color: var(--faint);
  font-size: 13.5px;
}

/* Models */
.model {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 32px 28px;
}
.model ul {
  margin: 8px 0 24px;
  padding: 0;
  list-style: none;
  color: var(--muted);
}
.model li {
  position: relative;
  padding-left: 22px;
  margin: 10px 0;
}
.model li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
}
.model .btn { margin: auto auto; align-self: flex-start; }
.model--premium {
  border-color: rgba(34, 211, 238, 0.45);
  box-shadow: 0 0 0 1px rgba(34, 211, 238, 0.12), 0 18px 50px rgba(0, 212, 255, 0.06);
}
.tag {
  position: absolute;
  top: 15px;
  right: 18px;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.12);
  color: var(--cyan);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

/* Form */
.form-card { max-width: 760px; margin: 28px auto 0; padding: 28px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field--full { grid-column: 1 / -1; }
.field span { font-size: 13px; font-weight: 600; color: #d5deee; }
.field input, .field select, .field textarea {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: rgba(8, 12, 20, 0.55);
  padding: 12px 14px;
  min-height: 46px;
}
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid rgba(34, 211, 238, 0.7);
  outline-offset: 1px;
  border-color: transparent;
}
.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 18px; }
.form-status { min-height: 1.4em; margin: 12px 0 0; font-size: 14px; }
.form-status.is-ok { color: var(--success); }
.form-status.is-err { color: var(--danger); }
.fine {
  margin: 0;
  color: var(--faint);
  font-size: 12.5px;
}

/* CTA band */
.cta {
  position: relative;
  padding: 64px 0;
  text-align: center;
  background:
    radial-gradient(680px 280px at 50% 0%, rgba(99, 102, 241, 0.38), transparent 70%),
    linear-gradient(180deg, #141228 0%, #1c1748 48%, #12182c 100%);
  border-block: 1px solid rgba(79, 70, 229, 0.35);
}
.cta h2 { margin-inline: auto; }
.cta .section__intro { color: #c9d4ea; }
.models-hero {
  margin: 0 auto 8px;
  max-width: 760px;
  text-align: center;
}
.models-hero h2 {
  max-width: none;
  margin-inline: auto;
  font-size: clamp(2.4rem, 5vw, 3.75rem);
  letter-spacing: -1.4px;
}
.models-hero .section__intro { margin-inline: auto; }
.contact-split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
  grid-template-areas:
    "heading heading"
    "form aside";
  column-gap: 22px;
  row-gap: 16px;
  align-items: stretch;
  text-align: left;
}
.contact-heading { grid-area: heading; text-align: center; }
.contact-heading h2 { margin-inline: auto; }
.contact-form-col { grid-area: form; display: flex; min-height: 0; }
.contact-split .form-card {
  margin: 0;
  max-width: none;
  width: 100%;
  height: 100%;
  padding: 20px 20px 16px;
  display: flex;
  flex-direction: column;
}
.contact-aside {
  grid-area: aside;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 20px 20px 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  background: rgba(8, 12, 20, 0.38);
}
.contact-aside h2,
.contact-aside .section__intro { margin-inline: 0; text-align: left; }
.contact-aside .checks {
  justify-content: flex-start;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  margin-top: 16px;
}
.contact-aside .btn { margin-top: 8px; align-self: flex-start; }
.aside-mail { margin: 16px 0 0; }
.contact-split .form-actions {
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-top: 14px;
}
.form-status { margin-bottom: 0; text-align: center; }
.contact-split[hidden] { display: none !important; }
.proposal-success {
  width: min(532px, calc(100% - 40px));
  margin: 8px auto 0;
  padding: 40px 127px;
  text-align: center;
  border: 1px solid rgba(34, 211, 238, 0.35);
  border-radius: 22px;
  background:
    radial-gradient(480px 200px at 50% 0%, rgba(34, 211, 238, 0.24), transparent 72%),
    linear-gradient(165deg, rgba(79, 70, 229, 0.55), rgba(12, 16, 32, 0.82) 58%, rgba(8, 12, 20, 0.92));
  box-shadow: 0 24px 70px rgba(34, 211, 238, 0.14);
}
.proposal-success h2 {
  max-width: none;
  margin: 8px auto 12px;
  font-size: clamp(1.2rem, 2.5vw, 2.4rem);
  letter-spacing: -1.2px;
}
.proposal-success .section__intro { margin-inline: auto; color: #d5def0; }
.proposal-success[hidden] { display: none !important; }
.checks {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 28px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
  color: #d5deee;
  font-size: 14px;
}
.checks li { display: flex; align-items: center; gap: 8px; }
.checks svg { width: 16px; height: 16px; color: var(--success); }

/* Footer */
.site-footer { background: #090d16; border-top: 1px solid rgba(255, 255, 255, 0.05); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 40px;
  padding: 64px 0 36px;
}
.footer-label {
  margin: 0 0 14px;
  color: var(--faint);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
}
.site-footer p { margin: 14px 0 0; max-width: 260px; color: var(--muted); font-size: 11.5px; }
.site-footer ul { margin: 0; padding: 0; list-style: none; }
.site-footer li + li { margin-top: 10px; }
.site-footer a { color: #b7c3d8; text-decoration: none; font-size: 13px; }
.site-footer a:hover { color: var(--text); }
.ig {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  padding: 8px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
}
.legal-bar {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 28px 0 40px;
  color: #7d8ba3;
  font-size: 12px;
  line-height: 1.75;
}
.legal-bar p { margin: 0; max-width: 920px; }
.legal-bar p + p { margin-top: 14px; }
.legal-bar a {
  color: #22d3ee;
  font-size: 12px;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Cookie banner */
.cookie {
  position: fixed;
  z-index: 50;
  right: 16px;
  bottom: 16px;
  left: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: 920px;
  margin-inline: auto;
  padding: 16px 16px 16px 18px;
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  background: rgba(16, 22, 36, 0.96);
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.4);
}
.cookie[hidden] { display: none !important; }
.cookie p { margin: 0; color: var(--muted); font-size: 14px; }
.cookie__actions { display: flex; flex-wrap: wrap; gap: 8px; flex: none; }

/* Legal pages */
.legal-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(940px, calc(100% - 40px));
  margin: 28px auto 18px;
}
.legal-top .logo img { width: 34px; height: 34px; }
.legal-wrap { width: min(940px, calc(100% - 40px)); margin: 0 auto 80px; }
.legal-card {
  background: rgba(23, 31, 51, 0.88);
  border: 1px solid #2a3550;
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 18px;
}
.legal-card h1 { margin: 0 0 10px; font-family: var(--display); font-size: clamp(1.8rem, 3vw, 2.15rem); letter-spacing: -0.5px; }
.legal-card h2 { margin: 0 0 14px; color: var(--cyan); font-size: 22px; }
.legal-card h3 { margin: 0 0 8px; font-size: 17px; }
.legal-card p, .legal-card li { color: #9aabc8; }
.legal-card .meta { font-size: 13px; }
.legal-grid { display: grid; gap: 14px; }
.entity {
  border: 1px solid #2a3550;
  background: #10182a;
  border-radius: 14px;
  padding: 16px;
}
.legal-card table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.legal-card th, .legal-card td {
  border: 1px solid #2a3550;
  padding: 10px;
  text-align: left;
  vertical-align: top;
}
.legal-card th { color: var(--text); background: #10182a; font-weight: 600; }
.legal-card td { color: #9aabc8; }
.table-scroll { overflow-x: auto; }

@media (min-width: 900px) {
  .legal-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 980px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats { gap: 36px; }
}

@media (max-width: 760px) {
  .nav__links, .nav .lang, .nav .btn--outline { display: none; }
  .nav--legal .nav__links { display: flex; flex-wrap: wrap; justify-content: flex-end; }
  .nav__toggle { display: inline-block; }
  .grid-2, .grid-3, .models, .form-grid, .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 64px 0 72px; }
  .section, .cta { padding: 72px 0; }
  .stats { flex-direction: column; gap: 22px; align-items: center; }
  .stats li { min-width: 0; padding: 18px 0 0; }
  .stats li + li::before { top: 0; right: 18%; left: 18%; bottom: auto; width: auto; height: 1px; background: linear-gradient(90deg, transparent, #4f46e5, #00d4ff, transparent); }
  .contact-split {
    grid-template-columns: 1fr;
    grid-template-areas: "heading" "form" "aside";
  }
  .cookie { flex-direction: column; align-items: stretch; }
  .container { width: min(var(--container), calc(100% - 32px)); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}