/* Linkano marketing site — static, no build step */

:root {
  color-scheme: light dark;
  --font-sans: "SF Pro Text", "SF Pro Display", -apple-system, BlinkMacSystemFont,
    "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, monospace;

  --bg: #f4f7fb;
  --bg-elevated: #ffffff;
  --bg-muted: #e8eef6;
  --text: #0f172a;
  --text-muted: #475569;
  --border: rgba(15, 23, 42, 0.1);
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.12);
  --hero-glow: rgba(37, 99, 235, 0.25);
  --shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --max: 1120px;
  --header-h: 64px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #070b12;
    --bg-elevated: #0f1623;
    --bg-muted: #151f30;
    --text: #e8eef7;
    --text-muted: #94a3b8;
    --border: rgba(148, 163, 184, 0.16);
    --accent: #60a5fa;
    --accent-hover: #93c5fd;
    --accent-soft: rgba(96, 165, 250, 0.14);
    --hero-glow: rgba(96, 165, 250, 0.22);
    --shadow: 0 28px 70px rgba(0, 0, 0, 0.45);
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--accent-hover);
}

.container {
  width: min(var(--max), calc(100% - 2rem));
  margin-inline: auto;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 650;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  box-shadow: 0 4px 14px var(--hero-glow);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--text);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.7rem;
  font: inherit;
  cursor: pointer;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.72rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #fff !important;
  text-decoration: none;
  box-shadow: 0 10px 30px var(--hero-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff !important;
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text) !important;
  border-color: var(--border);
  text-decoration: none;
}

.btn-secondary:hover {
  border-color: var(--accent);
}

/* Hero */

.hero {
  position: relative;
  padding: 4.5rem 0 3.5rem;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -40% -20% auto;
  height: 70%;
  background: radial-gradient(ellipse at 30% 20%, var(--hero-glow), transparent 65%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 0.75rem;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.2rem, 4.5vw, 3.35rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero-lead {
  margin: 0 0 1.75rem;
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 34rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.hero-meta {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-card {
  width: min(100%, 380px);
  padding: 1.5rem;
  border-radius: calc(var(--radius) + 4px);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.hero-card img {
  width: 120px;
  display: block;
  margin: 0 auto 1rem;
  border-radius: 26px;
}

.hero-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-card li {
  display: flex;
  gap: 0.6rem;
  padding: 0.55rem 0;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
}

.hero-card li:first-child {
  border-top: 0;
  padding-top: 0;
}

.hero-card .icon {
  flex-shrink: 0;
  width: 1.35rem;
  text-align: center;
  opacity: 0.85;
}

/* Sections */

.section {
  padding: 3.5rem 0;
}

.section-alt {
  background: var(--bg-muted);
  border-block: 1px solid var(--border);
}

.section h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  letter-spacing: -0.02em;
}

.section-intro {
  margin: 0 0 2rem;
  color: var(--text-muted);
  max-width: 42rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.feature-card {
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
}

.feature-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.feature-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.96rem;
}

.app-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pill {
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.88rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.cta-band {
  text-align: center;
  padding: 3rem 2rem;
  border-radius: calc(var(--radius) + 6px);
  background: linear-gradient(
    135deg,
    var(--accent-soft),
    color-mix(in srgb, var(--bg-elevated) 90%, transparent)
  );
  border: 1px solid var(--border);
}

.cta-band h2 {
  margin-bottom: 0.75rem;
}

.cta-band p {
  margin: 0 auto 1.5rem;
  max-width: 32rem;
  color: var(--text-muted);
}

/* Footer */

.site-footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.92rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text);
}

/* Manual layout */

.manual-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 2.5rem;
  padding: 2.5rem 0 4rem;
  align-items: start;
}

.manual-toc {
  position: sticky;
  top: calc(var(--header-h) + 1.25rem);
  max-height: calc(100vh - var(--header-h) - 2.5rem);
  overflow: auto;
  padding: 1rem 1rem 1rem 0;
  font-size: 0.9rem;
}

.manual-toc h2 {
  margin: 0 0 0.75rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.manual-toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.manual-toc li {
  margin: 0.15rem 0;
}

.manual-toc a {
  display: block;
  padding: 0.3rem 0.5rem;
  border-radius: 6px;
  color: var(--text-muted);
  text-decoration: none;
}

.manual-toc a:hover,
.manual-toc a.is-active {
  color: var(--text);
  background: var(--accent-soft);
}

.manual-content h1 {
  margin: 0 0 0.35rem;
  font-size: 2rem;
  letter-spacing: -0.02em;
}

.manual-version {
  margin: 0 0 2rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.manual-content section {
  margin-bottom: 2.75rem;
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

.manual-content h2 {
  margin: 0 0 0.75rem;
  padding-top: 0.5rem;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
  border-top: 1px solid var(--border);
}

.manual-content section:first-of-type h2 {
  border-top: 0;
  padding-top: 0;
}

.manual-content h3 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.1rem;
}

.manual-content p,
.manual-content li {
  color: var(--text);
}

.manual-content li {
  margin: 0.35rem 0;
}

.manual-content ul,
.manual-content ol {
  padding-left: 1.35rem;
}

.manual-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin: 1rem 0;
}

.manual-content th,
.manual-content td {
  border: 1px solid var(--border);
  padding: 0.55rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

.manual-content th {
  background: var(--bg-muted);
  font-weight: 600;
}

.manual-content code,
.manual-content kbd {
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.manual-content code {
  padding: 0.12rem 0.35rem;
  border-radius: 5px;
  background: var(--bg-muted);
  border: 1px solid var(--border);
}

.manual-content kbd {
  display: inline-block;
  padding: 0.1rem 0.4rem;
  border-radius: 5px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  box-shadow: 0 1px 0 var(--border);
  white-space: nowrap;
}

.manual-content pre {
  overflow-x: auto;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-sm);
  background: var(--bg-muted);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  line-height: 1.5;
}

.manual-content pre code {
  padding: 0;
  border: 0;
  background: none;
}

.callout {
  padding: 1rem 1.15rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--accent-soft);
  margin: 1rem 0;
}

.callout strong {
  display: block;
  margin-bottom: 0.25rem;
}

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

  .hero-visual {
    order: -1;
  }

  .manual-layout {
    grid-template-columns: 1fr;
  }

  .manual-toc {
    position: static;
    max-height: none;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-elevated);
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav .btn {
    width: 100%;
    margin-top: 0.5rem;
  }
}