/* Liink — liink.pro
   Dark production look mirrored from the app:
   bg #15202B → #070B10, accent #3DDC97 → #22D3EE. */

:root {
  --bg: #070B10;
  --bg-2: #15202B;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #E8EEF2;
  --muted: #8FA3B0;
  --accent: #3DDC97;
  --cyan: #22D3EE;
  --blue: #4B8CFF;
  --max: 1160px;
  --radius: 16px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.grad {
  background: linear-gradient(120deg, var(--accent), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px clamp(20px, 5vw, 48px);
  background: rgba(7, 11, 16, 0.72);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--card-border);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
}
.brand:hover { text-decoration: none; }
.site-nav { display: flex; gap: clamp(12px, 3vw, 28px); }
.site-nav a { color: var(--muted); font-size: 0.95rem; font-weight: 500; }
.site-nav a:hover { color: var(--text); text-decoration: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: radial-gradient(120% 120% at 50% 0%, var(--bg-2) 0%, var(--bg) 60%);
  padding: clamp(64px, 12vw, 140px) clamp(20px, 5vw, 48px) clamp(48px, 8vw, 96px);
}
.hero-glow {
  position: absolute;
  inset: -20% 0 auto 0;
  height: 600px;
  background: radial-gradient(50% 50% at 50% 40%, rgba(61, 220, 151, 0.18), transparent 70%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}
.hero-brand-lockup {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 2.4vw, 22px);
  margin: 0 0 clamp(24px, 3.5vw, 34px);
}
.hero-brand-lockup img {
  width: clamp(78px, 9vw, 104px);
  height: clamp(78px, 9vw, 104px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 23%;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.38), 0 0 42px rgba(61, 220, 151, 0.13);
}
.hero-brand-lockup span {
  color: var(--text);
  font-size: clamp(2.6rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 1;
}
.hero-kicker {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: clamp(0.72rem, 1.5vw, 0.82rem);
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(2.1rem, 6vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  font-weight: 800;
}
.lede {
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  color: var(--muted);
  max-width: 730px;
  margin: 0 auto 24px;
}
.hero-capabilities {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0 auto 34px;
  list-style: none;
}
.hero-capabilities li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid rgba(61, 220, 151, 0.18);
  border-radius: 999px;
  background: rgba(61, 220, 151, 0.055);
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 700;
}
.hero-capabilities li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px rgba(61, 220, 151, 0.6);
}
.cta-row {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-note { margin-top: 22px; color: var(--muted); font-size: 0.9rem; }
.platform-row {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 24px;
}
.platform-row span,
.platform-badges span,
.hardware-tags span,
.use-case-row span {
  border: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.035);
  color: var(--muted);
  border-radius: 999px;
  padding: 5px 11px;
  font-size: 0.78rem;
  font-weight: 600;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(120deg, var(--accent), var(--cyan));
  color: #04130C;
  box-shadow: 0 10px 30px rgba(61, 220, 151, 0.25);
}
.btn-ghost {
  color: var(--text);
  border: 1px solid var(--card-border);
  background: var(--card);
}

/* ---------- Strip ---------- */
.strip {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  max-width: var(--max);
  margin: -38px auto 0;
  padding: 0 clamp(20px, 5vw, 48px);
}
.strip-item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 0;
  min-height: 162px;
  overflow: hidden;
  padding: 21px;
  text-align: left;
  background:
    radial-gradient(120% 90% at 0% 0%, rgba(61, 220, 151, 0.1), transparent 58%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.025));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.25);
}
.strip-item::after {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(61, 220, 151, 0.48), transparent);
  opacity: 0.75;
}
.strip-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 12px;
  margin-bottom: 17px;
}
.strip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  color: var(--accent);
  background: rgba(61, 220, 151, 0.09);
  border: 1px solid rgba(61, 220, 151, 0.18);
  border-radius: 11px;
}
.strip-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.strip-kicker {
  color: var(--muted);
  font-size: 0.67rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.strip-item strong {
  display: block;
  color: var(--text);
  font-size: 1rem;
  font-weight: 750;
  letter-spacing: -0.015em;
  line-height: 1.3;
}
.strip-description {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.79rem;
  line-height: 1.45;
}

/* ---------- Sections ---------- */
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(64px, 10vw, 110px) clamp(20px, 5vw, 48px);
}
.section-alt { background: linear-gradient(180deg, transparent, rgba(21, 32, 43, 0.4), transparent); max-width: none; }
.section-alt > * { max-width: var(--max); margin-left: auto; margin-right: auto; }
.section-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  text-align: center;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
  font-weight: 800;
}
.section-kicker {
  margin: 0 0 10px;
  color: var(--accent);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.74rem;
  font-weight: 700;
}
.section-sub {
  text-align: center;
  color: var(--muted);
  max-width: 620px;
  margin: 0 auto 48px;
  font-size: 1.08rem;
}

/* ---------- Product split ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}
.product-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: clamp(26px, 4vw, 38px);
  border: 1px solid var(--card-border);
  border-radius: 22px;
  background:
    radial-gradient(90% 70% at 100% 0%, rgba(34, 211, 238, 0.08), transparent 60%),
    rgba(255, 255, 255, 0.035);
  overflow: hidden;
}
.product-server {
  border-color: rgba(61, 220, 151, 0.24);
  background:
    radial-gradient(90% 70% at 100% 0%, rgba(61, 220, 151, 0.14), transparent 60%),
    rgba(255, 255, 255, 0.045);
}
.product-topline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}
.product-label {
  display: inline-flex;
  width: fit-content;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(61, 220, 151, 0.12);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.product-label-free { background: rgba(34, 211, 238, 0.11); color: var(--cyan); }
.status-dot {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
}
.status-dot::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(61, 220, 151, 0.65);
}
.product-card h3 {
  margin: 0 0 8px;
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  letter-spacing: -0.025em;
}
.product-lede { color: var(--muted); margin: 0 0 24px; font-size: 1.03rem; }
.check-list {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  display: grid;
  gap: 11px;
}
.check-list li {
  position: relative;
  padding-left: 27px;
  color: var(--text);
  font-size: 0.94rem;
}
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: -1px;
  color: var(--accent);
  font-weight: 800;
}
.platform-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: auto;
}

/* ---------- Hardware routing ---------- */
.hardware-section { overflow: hidden; }
.routing-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.route-card {
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: clamp(22px, 4vw, 32px);
  background: rgba(7, 11, 16, 0.6);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.18);
}
.route-card-wide { grid-column: 1 / -1; }
.route-heading {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}
.route-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border-radius: 13px;
  background: linear-gradient(145deg, rgba(61, 220, 151, 0.18), rgba(34, 211, 238, 0.12));
  border: 1px solid rgba(61, 220, 151, 0.2);
  color: var(--accent);
  font-size: 1.2rem;
  font-weight: 800;
}
.route-type {
  margin: 0 0 2px;
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.13em;
}
.route-heading h3 { margin: 0; font-size: 1.12rem; }
.route-card > p { margin: 20px 0 0; color: var(--muted); font-size: 0.93rem; }
.route-map {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  min-height: 116px;
}
.route-map-single { min-height: 76px; }
.route-stack { display: grid; gap: 8px; }
.route-stack span {
  display: block;
  padding: 8px 10px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.035);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 650;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.route-destination span {
  border-color: rgba(61, 220, 151, 0.22);
  background: rgba(61, 220, 151, 0.07);
  color: var(--text);
}
.route-arrow {
  color: var(--accent);
  font-size: 1.35rem;
  filter: drop-shadow(0 0 8px rgba(61, 220, 151, 0.5));
}
.hardware-tags,
.use-case-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
}
.hardware-tags span { border-color: rgba(34, 211, 238, 0.16); }

/* ---------- Feature grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: rgba(61, 220, 151, 0.4); transform: translateY(-3px); }
.card-icon { font-size: 1.8rem; margin-bottom: 14px; }
.card h3 { margin: 0 0 8px; font-size: 1.2rem; }
.card p { margin: 0; color: var(--muted); }
.card-featured-output {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  align-items: center;
  gap: clamp(28px, 5vw, 64px);
  padding: clamp(28px, 5vw, 42px);
  border-color: rgba(61, 220, 151, 0.22);
  background:
    radial-gradient(70% 130% at 100% 50%, rgba(34, 211, 238, 0.12), transparent 68%),
    radial-gradient(90% 150% at 0% 0%, rgba(61, 220, 151, 0.09), transparent 62%),
    rgba(255, 255, 255, 0.04);
}
.output-feature-copy {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 18px;
}
.output-feature-copy .card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin: 0;
  border: 1px solid rgba(61, 220, 151, 0.2);
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(61, 220, 151, 0.17), rgba(34, 211, 238, 0.1));
  color: var(--accent);
  font-size: 1.35rem;
  font-weight: 800;
}
.card .card-kicker {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.card-featured-output h3 { font-size: clamp(1.3rem, 2.4vw, 1.7rem); }
.output-feature-panel {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 14px;
  background: rgba(7, 11, 16, 0.52);
}
.output-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 10px;
}
.output-node {
  display: flex;
  min-width: 0;
  min-height: 78px;
  flex-direction: column;
  justify-content: center;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.035);
}
.output-node small {
  margin-bottom: 3px;
  color: var(--muted);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.output-node strong {
  font-size: 0.82rem;
  line-height: 1.35;
}
.output-destination {
  border-color: rgba(61, 220, 151, 0.25);
  background: rgba(61, 220, 151, 0.07);
}
.output-arrow {
  color: var(--accent);
  font-size: 1.25rem;
  filter: drop-shadow(0 0 8px rgba(61, 220, 151, 0.5));
}
.output-platforms {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}
.output-platforms span {
  padding: 4px 8px;
  border: 1px solid rgba(34, 211, 238, 0.16);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.67rem;
  font-weight: 650;
}

/* ---------- Steps ---------- */
.steps {
  list-style: none;
  counter-reset: step;
  padding: 0;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.steps-four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.steps li { position: relative; padding-top: 8px; }
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  font-weight: 800;
  font-size: 1.2rem;
  color: #04130C;
  background: linear-gradient(120deg, var(--accent), var(--cyan));
  margin-bottom: 14px;
}
.steps h3 { margin: 0 0 6px; font-size: 1.2rem; }
.steps p { margin: 0; color: var(--muted); }
.how-note {
  text-align: center;
  color: var(--muted);
  max-width: 640px;
  margin: 48px auto 0;
  font-size: 0.98rem;
}

/* ---------- Use cases ---------- */
.use-cases { padding-top: clamp(56px, 8vw, 88px); padding-bottom: clamp(56px, 8vw, 88px); }
.use-case-row { margin-top: -16px; }
.use-case-row span { padding: 7px 14px; color: var(--text); }

/* ---------- FAQ ---------- */
.faq { max-width: 760px; margin: 0 auto; }
.faq details {
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: var(--card);
  padding: 4px 20px;
  margin-bottom: 12px;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  padding: 16px 0;
  list-style: none;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  color: var(--accent);
  font-size: 1.4rem;
  line-height: 1;
}
.faq details[open] summary::after { content: "–"; }
.faq p { margin: 0 0 16px; color: var(--muted); }

/* ---------- Final CTA ---------- */
.final-cta { text-align: center; }
.final-cta h2 { font-size: clamp(1.8rem, 4.5vw, 2.6rem); margin: 0 0 12px; letter-spacing: -0.02em; }
.final-cta p { color: var(--muted); margin: 0 0 28px; font-size: 1.1rem; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--card-border);
  padding: 40px clamp(20px, 5vw, 48px);
  text-align: center;
  color: var(--muted);
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
}
.footer-nav { display: flex; gap: 22px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.footer-nav a { color: var(--muted); font-size: 0.95rem; }
.footer-nav a:hover { color: var(--text); }
.copyright { font-size: 0.85rem; margin: 0; }

/* ---------- Legal pages ---------- */
.legal {
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(48px, 8vw, 90px) clamp(20px, 5vw, 48px);
}
.legal h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); letter-spacing: -0.02em; margin: 0 0 8px; }
.legal .updated { color: var(--muted); margin: 0 0 36px; font-size: 0.9rem; }
.legal h2 { font-size: 1.3rem; margin: 36px 0 10px; }
.legal h3 { font-size: 1.05rem; margin: 24px 0 8px; }
.legal p, .legal li { color: var(--muted); }
.legal a { color: var(--accent); }
.back-link { display: inline-block; margin-bottom: 28px; color: var(--muted); font-size: 0.9rem; }

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .site-nav { display: none; }
  .strip { grid-template-columns: repeat(2, 1fr); }
  .product-grid, .routing-grid { grid-template-columns: 1fr; }
  .card-featured-output { grid-template-columns: 1fr; }
  .route-card-wide { grid-column: auto; }
  .steps-four { grid-template-columns: 1fr; gap: 34px; }
}

@media (max-width: 480px) {
  .hero { padding-top: 56px; }
  .strip { gap: 10px; }
  .strip-item { min-height: 152px; padding: 16px; }
  .strip-meta { margin-bottom: 14px; }
  .strip-icon { width: 34px; height: 34px; }
  .strip-icon svg { width: 18px; height: 18px; }
  .product-card, .route-card { border-radius: 16px; }
  .route-map {
    grid-template-columns: 1fr;
    justify-items: stretch;
  }
  .route-arrow { justify-self: center; transform: rotate(90deg); }
  .product-topline { align-items: flex-start; }
  .output-feature-copy { grid-template-columns: 1fr; }
  .output-flow { grid-template-columns: 1fr; }
  .output-arrow { justify-self: center; transform: rotate(90deg); }
}

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