/* ===== SmartProbe — landing site design tokens =====
   Paleta tomada de frontend/public/css/global.css (tema Dark de la app) */
:root {
  --color-bg: #0f1412;
  --color-bg-elevated: #131816;
  --color-surface: #1a2422;
  --color-surface-raised: #22312f;
  --color-surface-muted: #2d403d;
  --color-text: #edf7f3;
  --color-text-muted: #aebdb7;
  --color-border: #344743;
  --color-border-strong: #4a625c;
  --color-primary: #2dd4bf;
  --color-primary-hover: #5eead4;
  --color-primary-soft: rgba(45, 212, 191, 0.14);
  --color-on-primary: #0a1614;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-danger: #f43f5e;

  --font-sans: "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --container-w: 1160px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-panel: 0 24px 60px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; }
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--color-primary); color: var(--color-on-primary);
  padding: 10px 16px; border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(15, 20, 18, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 92px;
}
.brand img { height: 68px; width: auto; }
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: 8px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--color-text); border-radius: 2px; }

.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav a { color: var(--color-text); font-weight: 500; font-size: 0.95rem; white-space: nowrap; }
.site-nav a:hover { color: var(--color-primary); }

.lang-switch { display: flex; gap: 10px; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.04em; }
.lang-switch a { color: var(--color-text-muted); }
.lang-switch a:hover { color: var(--color-primary); }
.lang-current { color: var(--color-primary); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: 999px; font-weight: 700; font-size: 0.95rem;
  border: 1px solid transparent; cursor: pointer; transition: all .15s ease;
}
.btn-primary { background: var(--color-primary); color: var(--color-on-primary); }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-outline { background: transparent; color: var(--color-text); border-color: var(--color-border-strong); }
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }
.nav-cta { padding: 10px 20px; }

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 96px 0 84px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: -20% -10% auto -10%; height: 640px;
  background: radial-gradient(60% 60% at 50% 0%, var(--color-primary-soft) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--color-primary); font-weight: 700; font-size: 0.82rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  background: var(--color-primary-soft); border-radius: 999px; padding: 6px 14px;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2.1rem, 4vw, 3.4rem);
  line-height: 1.12; font-weight: 900; margin: 0 0 20px;
  letter-spacing: -0.01em;
}
.hero h1 .accent { color: var(--color-primary); }
.hero p.lead { font-size: 1.15rem; color: var(--color-text-muted); max-width: 46ch; margin: 0 0 32px; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-visual {
  position: relative; aspect-ratio: 8/5; border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--color-surface-raised), var(--color-surface));
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-panel);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.hero-visual svg { width: 78%; height: 78%; }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }

/* ===== Sections ===== */
section { padding: 80px 0; }
.section-head { max-width: 640px; margin: 0 auto 52px; text-align: center; }
.section-head .eyebrow { display: inline-block; }
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 800; margin: 0 0 14px; letter-spacing: -0.01em; }
.section-head p { color: var(--color-text-muted); font-size: 1.05rem; margin: 0; }

.section-alt { background: var(--color-bg-elevated); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }

/* problem / solution */
.split {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
}
.split h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 800; margin: 0 0 16px; }
.split p { color: var(--color-text-muted); font-size: 1.05rem; }
.split ul { list-style: none; margin: 24px 0 0; padding: 0; display: grid; gap: 14px; }
.split ul li { display: flex; gap: 12px; align-items: flex-start; color: var(--color-text); }
.split ul li svg { flex: none; width: 22px; height: 22px; color: var(--color-primary); margin-top: 2px; }

/* cards grid */
.grid { display: grid; gap: 24px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: transform .18s ease, border-color .18s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--color-border-strong); }
.card .icon {
  width: 46px; height: 46px; border-radius: var(--radius-sm);
  background: var(--color-primary-soft); color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.card .icon svg { width: 24px; height: 24px; }
.card h3 { font-size: 1.08rem; font-weight: 700; margin: 0 0 10px; }
.card p { color: var(--color-text-muted); font-size: 0.95rem; margin: 0; }

/* steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; counter-reset: step; }
.step { position: relative; padding-left: 4px; }
.step .num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--color-surface-raised); border: 1px solid var(--color-border-strong);
  color: var(--color-primary); font-weight: 800; margin-bottom: 18px;
}
.step h3 { font-size: 1.05rem; font-weight: 700; margin: 0 0 8px; }
.step p { color: var(--color-text-muted); margin: 0; font-size: 0.95rem; }

/* protocols / compatibility */
.protocol-list { display: flex; flex-wrap: wrap; gap: 12px; margin: 20px 0 0; }
.protocol-pill {
  border: 1px solid var(--color-border-strong); border-radius: 999px;
  padding: 8px 18px; font-weight: 700; font-size: 0.9rem; color: var(--color-primary);
  background: var(--color-surface);
}
.device-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 32px; }
.device-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 22px; text-align: center;
}
.device-card img, .device-card svg { width: 44px; height: 44px; margin: 0 auto 14px; }
.device-card .brand-name { font-weight: 800; font-size: 0.95rem; }
.device-card .model-name { color: var(--color-text-muted); font-size: 0.82rem; margin-top: 2px; }

/* trust band */
.trust-band {
  text-align: center; padding: 56px 0; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border);
}
.trust-band p { color: var(--color-text-muted); max-width: 720px; margin: 0 auto; font-size: 1.05rem; }

/* final CTA */
.cta-final {
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-surface-raised), var(--color-bg-elevated));
  border: 1px solid var(--color-border-strong);
  padding: 64px 48px; text-align: center;
  position: relative; overflow: hidden;
}
.cta-final::after {
  content: ""; position: absolute; inset: auto -10% -60% -10%; height: 320px;
  background: radial-gradient(50% 50% at 50% 50%, var(--color-primary-soft), transparent 70%);
}
.cta-final h2 { position: relative; font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 800; margin: 0 0 14px; }
.cta-final p { position: relative; color: var(--color-text-muted); max-width: 52ch; margin: 0 auto 30px; font-size: 1.05rem; }
.cta-final .btn { position: relative; }

/* generic page hero (features / compatibility / contact) */
.page-hero { padding: 64px 0 48px; text-align: center; }
.page-hero .eyebrow { display: inline-block; }
.page-hero h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); font-weight: 900; margin: 0 0 16px; letter-spacing: -0.01em; }
.page-hero p { color: var(--color-text-muted); font-size: 1.1rem; max-width: 620px; margin: 0 auto; }

/* contact */
.contact-card {
  max-width: 620px; margin: 0 auto; background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 44px; text-align: center;
}
.contact-methods { display: flex; flex-direction: column; gap: 16px; margin: 28px 0; }
.contact-method {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  padding: 16px; border-radius: var(--radius-sm); background: var(--color-surface-raised);
  border: 1px solid var(--color-border); font-weight: 600;
}
.contact-method svg { width: 20px; height: 20px; color: var(--color-primary); }

/* ===== Manual ===== */
.card.manual-card { display: block; text-decoration: none; }
.card.manual-card h3 { color: var(--color-text); }

.manual-layout {
  display: grid; grid-template-columns: 240px 1fr; gap: 48px;
  align-items: start; padding: 8px 0 64px;
}
.manual-sidebar {
  position: sticky; top: 96px;
  display: flex; flex-direction: column; gap: 2px;
}
.manual-toc-home {
  color: var(--color-text); font-weight: 800; font-size: 0.92rem;
  border-bottom: 1px solid var(--color-border);
  padding: 0 0 14px !important; margin-bottom: 10px;
}
.manual-sidebar nav { display: flex; flex-direction: column; gap: 2px; }
.manual-sidebar a {
  padding: 10px 14px; border-radius: var(--radius-sm);
  color: var(--color-text-muted); font-size: 0.92rem; font-weight: 600;
}
.manual-sidebar a:hover { background: var(--color-surface); color: var(--color-text); }
.manual-sidebar a.active { background: var(--color-primary-soft); color: var(--color-primary); }

.manual-content { max-width: 760px; }
.manual-content img {
  max-width: 100%; height: auto; display: block;
  border-radius: var(--radius-md); border: 1px solid var(--color-border);
  box-shadow: var(--shadow-panel); margin: 24px 0;
}
.manual-content em {
  display: block; text-align: center; color: var(--color-text-muted);
  font-size: 0.85rem; margin: -12px 0 24px;
}
.manual-content h2 { font-size: 1.5rem; font-weight: 800; margin: 48px 0 16px; }
.manual-content h2:first-child { margin-top: 0; }
.manual-content h3 { font-size: 1.15rem; font-weight: 700; margin: 32px 0 12px; }
.manual-content p { color: var(--color-text-muted); margin: 0 0 16px; font-size: 1rem; }
.manual-content ul, .manual-content ol { color: var(--color-text-muted); margin: 0 0 16px; padding-left: 22px; display: grid; gap: 8px; }
.manual-content li::marker { color: var(--color-primary); font-weight: 700; }
.manual-content strong { color: var(--color-text); }
.manual-content code {
  background: var(--color-surface-raised); border: 1px solid var(--color-border);
  border-radius: 4px; padding: 2px 6px; font-size: 0.9em; color: var(--color-primary);
}
.manual-content blockquote {
  background: var(--color-surface); border: 1px solid var(--color-border); border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-sm); padding: 16px 20px; margin: 20px 0; color: var(--color-text-muted); font-size: 0.95rem;
}
.manual-content blockquote p:last-child { margin-bottom: 0; }
.manual-content hr { border: none; border-top: 1px solid var(--color-border); margin: 40px 0; }

@media (max-width: 900px) {
  .manual-layout { grid-template-columns: 1fr; padding-top: 0; }
  .manual-sidebar { position: static; }
  .manual-sidebar nav { flex-direction: row; flex-wrap: wrap; }
  .manual-toc-home { display: none; }
}

/* ===== Footer ===== */
.site-footer { border-top: 1px solid var(--color-border); background: var(--color-bg-elevated); padding: 56px 0 0; }
.footer-inner { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand p { color: var(--color-text-muted); font-size: 0.9rem; margin-top: 14px; max-width: 32ch; }
.footer-col h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-muted); margin: 0 0 16px; }
.footer-col a { display: block; color: var(--color-text); margin-bottom: 10px; font-size: 0.92rem; }
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom {
  border-top: 1px solid var(--color-border); padding: 22px 0;
  color: var(--color-text-muted); font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; max-width: 420px; margin: 0 auto; }
  .split { grid-template-columns: 1fr; }
  .grid-4, .grid-3, .device-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute; top: 76px; left: 0; right: 0;
    background: var(--color-bg-elevated); border-bottom: 1px solid var(--color-border);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px 24px 20px;
    max-height: 0; overflow: hidden; transition: max-height .25s ease;
  }
  .site-nav.is-open { max-height: 480px; }
  .site-nav > a, .lang-switch { padding: 12px 0; border-bottom: 1px solid var(--color-border); }
  .site-nav > a.btn { border-bottom: none; }
  .nav-cta { margin-top: 12px; }
  .grid-4, .grid-3, .grid-2, .device-grid { grid-template-columns: 1fr; }
  .cta-final { padding: 44px 24px; }
}