/* GitSyncMarks website — comprehensive, readable, responsive */

:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --bg-elevated: #21262d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #79b8ff;
  --border: #30363d;
  --chrome: #4285f4;
  --firefox: #ff7139;
  --app: #6c5ce7;
  --success: #3fb950;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

.hero {
  text-align: center;
  padding: 1.5rem 1rem 2rem;
}

.hero-image {
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.quick-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1rem;
  font-weight: 600;
}

.quick-nav a {
  color: var(--text-muted);
}

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

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.badge {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  transition: border-color 0.2s, background 0.2s;
}

.badge:hover {
  border-color: var(--accent);
  background: rgba(88, 166, 255, 0.1);
}

.badge-chrome:hover {
  border-color: var(--chrome);
  background: rgba(66, 133, 244, 0.1);
}

.badge-firefox:hover {
  border-color: var(--firefox);
  background: rgba(255, 113, 57, 0.1);
}

.badge-app:hover {
  border-color: var(--app);
  background: rgba(108, 92, 231, 0.1);
}

.badge-open-source:hover {
  border-color: var(--success);
  background: rgba(63, 185, 80, 0.1);
}

.badge-beta:hover {
  border-color: var(--accent);
  background: rgba(88, 166, 255, 0.1);
}

.install-alt-block {
  margin-top: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: center;
}

.install-alt {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.install-alt-paths {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text);
}

.install-alt-paths code {
  font-size: 0.85em;
}

.wizard-hint {
  text-align: center;
  margin: 1.5rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
  color: var(--text-muted);
}

.wizard-intro {
  margin-bottom: 1rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.beta-cta {
  text-align: center;
  margin: 0.75rem 0 0;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.beta-cta strong {
  color: var(--text);
}

.beta-cta a {
  font-weight: 500;
}

/* Client tabs (Extension | App) */
.client-tabs {
  display: flex;
  gap: 0;
  justify-content: center;
  margin-top: 1rem;
  margin-bottom: 0;
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  padding: 0.6rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  margin-bottom: -1px;
  transition: color 0.2s, border-color 0.2s;
}

.tab-btn:hover {
  color: var(--text);
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-content {
  display: none;
  padding-top: 1.5rem;
}

.tab-content.active {
  display: block;
}

.tab-content > .quick-nav {
  margin-top: 0;
}

main {
  max-width: 56rem;
  margin: 0 auto;
  padding: 0 1rem 3rem;
}

section {
  margin-bottom: 3rem;
}

h2 {
  font-size: 1.5rem;
  color: var(--text);
  margin-bottom: 1.25rem;
  font-weight: 600;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 1.1rem;
  margin: 1rem 0 0.5rem;
  font-weight: 600;
}

h3:first-child {
  margin-top: 0;
}

.intro {
  margin-bottom: 2.5rem;
  text-align: center;
}

.lead {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
}

.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: var(--accent);
}

.feature-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.power-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.power-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.power-list li:last-child {
  border-bottom: none;
}

.generated-files ul,
.repo-structure ul {
  padding-left: 1.5rem;
}

.generated-files li,
.repo-structure li {
  margin-bottom: 0.5rem;
}

.steps {
  padding-left: 1.5rem;
}

.steps li {
  margin-bottom: 0.75rem;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code {
  background: var(--bg-card);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: ui-monospace, monospace;
}

pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.875rem;
}

pre code {
  background: none;
  padding: 0;
}

.install-tabs {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.install-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
}

.install-block h3 {
  margin-top: 0;
}

.install-block ol {
  padding-left: 1.5rem;
}

.install-block li {
  margin-bottom: 0.5rem;
}

.automation pre {
  margin: 0.5rem 0 1rem;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
}

.screenshot-grid figure {
  margin: 0;
  text-align: center;
}

.screenshot-grid img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.screenshot-grid figcaption {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.app-content {
  margin-top: 0;
}

.app-content :first-child {
  margin-top: 0;
}

.app-icon-wrap {
  text-align: center;
  margin: 0 0 1rem;
}

.app-icon {
  border-radius: 16px;
}

.app-store-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
}

.app-store-badges a {
  display: inline-block;
  line-height: 0;
}

.app-store-badges img {
  display: block;
  height: 40px;
  width: auto;
}

.troubleshooting dl {
  margin: 0;
}

.troubleshooting dt {
  font-weight: 600;
  margin-top: 1rem;
  color: var(--text);
}

.troubleshooting dt:first-child {
  margin-top: 0;
}

.troubleshooting dd {
  margin: 0.25rem 0 0;
  padding-left: 1rem;
  color: var(--text-muted);
}

footer {
  text-align: center;
  padding: 2rem 1rem;
  border-top: 1px solid var(--border);
}

footer nav.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem 3rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

footer .footer-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  justify-content: center;
}

footer a {
  color: var(--text-muted);
}

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

.copyright {
  margin: 0;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--text-muted);
}

@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .screenshot-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .install-tabs {
    grid-template-columns: repeat(2, 1fr);
  }

  .screenshot-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}