/* Adbnik — project site (GitHub Pages) */

:root {
  --bg: #070b12;
  --bg-elevated: #0f172a;
  --surface: #111c33;
  --border: rgba(148, 163, 184, 0.12);
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #2dd4bf;
  --accent-hover: #5eead4;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --radius: 12px;
  --font: system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "Consolas", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 120% 80% at 50% -20%, rgba(45, 212, 191, 0.12), transparent),
    radial-gradient(ellipse 80% 50% at 100% 0%, rgba(59, 130, 246, 0.06), transparent);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 9999;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--bg);
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.wrap {
  width: min(1120px, 100% - 2rem);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(7, 11, 18, 0.85);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.125rem;
}

.brand:hover {
  color: var(--accent);
  text-decoration: none;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem 1.25rem;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  font-size: 0.9375rem;
  font-weight: 500;
}

.nav a:hover {
  color: var(--text);
  text-decoration: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.875rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: #042f2e;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #022c22;
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover {
  background: var(--surface);
  text-decoration: none;
}

/* Hero */
.hero {
  padding: 4rem 0 3rem;
  text-align: center;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.hero-lead {
  margin: 0 auto 2rem;
  max-width: 42rem;
  font-size: 1.125rem;
  color: var(--muted);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
}

/* Sections */
section {
  padding: 3rem 0;
}

section h2 {
  margin: 0 0 1.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* Feature grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

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

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 600;
}

.card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--muted);
}

/* Install */
.install-block {
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
}

.install-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

pre,
.code {
  margin: 0;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.875rem;
  line-height: 1.5;
  color: #e2e8f0;
  background: #0a0f1a;
}

.install-note {
  margin: 1rem 0 0;
  font-size: 0.875rem;
  color: var(--muted);
}

/* Screens */
.shots {
  display: grid;
  gap: 1.5rem;
}

.shot {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
}

.shot img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: middle;
}

.shot figcaption {
  padding: 0.65rem 1rem;
  font-size: 0.8125rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

/* Footer */
.site-footer {
  margin-top: 2rem;
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--muted);
}

.footer-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.site-footer h3 {
  margin: 0 0 0.75rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
}

.site-footer ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer li {
  margin-bottom: 0.4rem;
}

.footer-bottom {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.8125rem;
}

@media (max-width: 640px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    width: 100%;
  }
}

/* --- User guide (long-form) --- */
.doc-page main {
  padding: 2rem 0 3rem;
}

.doc-page article.doc {
  max-width: 52rem;
  margin: 0 auto;
}

.doc-page article.doc h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
}

.doc-page .doc-lead {
  margin: 0 0 2rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.doc-page article.doc h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.35rem;
}

.doc-page article.doc h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.doc-page article.doc p,
.doc-page article.doc li {
  color: #cbd5e1;
  font-size: 0.9375rem;
}

.doc-page article.doc ul,
.doc-page article.doc ol {
  margin: 0.5rem 0 1rem 1.25rem;
  padding: 0;
}

.doc-page article.doc li {
  margin-bottom: 0.35rem;
}

.doc-page article.doc code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--surface);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.doc-page article.doc table.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  margin: 1rem 0;
}

.doc-page article.doc table.doc-table th,
.doc-page article.doc table.doc-table td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

.doc-page article.doc table.doc-table th {
  background: var(--bg-elevated);
  color: var(--text);
  font-weight: 600;
}

.doc-page article.doc .steps {
  counter-reset: step;
  list-style: none;
  margin-left: 0;
  padding: 0;
}

.doc-page article.doc .steps > li {
  position: relative;
  padding-left: 2.5rem;
  margin-bottom: 1rem;
  counter-increment: step;
}

.doc-page article.doc .steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.75rem;
  height: 1.75rem;
  line-height: 1.75rem;
  text-align: center;
  font-size: 0.8125rem;
  font-weight: 700;
  background: var(--accent);
  color: #042f2e;
  border-radius: 50%;
}

.doc-nav {
  margin: 1.5rem 0 2rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  font-size: 0.875rem;
}

.doc-nav a {
  font-weight: 600;
}