/* VimCode Website — OneDark-derived palette */
:root {
  --bg:          #1a1a1a;
  --bg-card:     #21252b;
  --bg-elevated: #282c34;
  --fg:          #abb2bf;
  --fg-bright:   #e5e5e5;
  --accent:      #61afef;
  --accent-hover:#528bff;
  --green:       #98c379;
  --yellow:      #e5c07b;
  --red:         #e06c75;
  --purple:      #c678dd;
  --muted:       #5c6370;
  --nav-bg:      #262633;
  --footer-bg:   #1e1e2e;
  --border:      #3a3a4a;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

code, pre, .mono {
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'SF Mono', Menlo, monospace;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: var(--accent-hover); }

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

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Navigation ─────────────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}
.nav .container {
  display: flex;
  align-items: center;
  height: 56px;
  gap: 2rem;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--fg-bright);
  text-decoration: none;
}
.nav-brand img {
  width: 28px;
  height: 28px;
}
.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin-left: auto;
}
.nav-links a {
  color: var(--fg);
  font-size: 0.9rem;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--fg-bright); }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.2rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, transform 0.1s;
  cursor: pointer;
  border: none;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--fg-bright);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-green {
  background: var(--green);
  color: #1a1a1a;
}
.btn-green:hover {
  background: #7cb668;
  color: #1a1a1a;
}

/* ── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  color: var(--fg-bright);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1rem;
}
.hero h1 .accent { color: var(--accent); }
.hero h1 .green  { color: var(--green); }
.hero .subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--fg);
  max-width: 640px;
  margin: 0 auto 2rem;
}
.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.badges {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}
.badge {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.badge strong {
  color: var(--fg);
  font-variant-numeric: tabular-nums;
}

/* ── Features ───────────────────────────────────────────────────────────── */
.features {
  padding: 4rem 0;
}
.features h2 {
  text-align: center;
  font-size: 2rem;
  color: var(--fg-bright);
  margin-bottom: 0.5rem;
}
.features .section-sub {
  text-align: center;
  color: var(--muted);
  margin-bottom: 2.5rem;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  transition: border-color 0.2s, transform 0.15s;
}
.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.feature-card .icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  display: block;
}
.feature-card h3 {
  font-size: 1.05rem;
  color: var(--fg-bright);
  margin-bottom: 0.4rem;
}
.feature-card p {
  font-size: 0.9rem;
  color: var(--fg);
  line-height: 1.55;
}

/* ── Screenshot ─────────────────────────────────────────────────────────── */
.screenshot {
  padding: 3rem 0;
}
.screenshot-placeholder {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 1.1rem;
}

/* ── Install ────────────────────────────────────────────────────────────── */
.install {
  padding: 4rem 0;
}
.install h2 {
  text-align: center;
  font-size: 2rem;
  color: var(--fg-bright);
  margin-bottom: 2rem;
}
.install-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
  overflow-x: auto;
}
.install-tabs input[type="radio"] { display: none; }
.install-tabs label {
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
}
.install-tabs label:hover { color: var(--fg); }
.install-tabs input:checked + label {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.install-panel {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
}
.install-panel pre {
  background: var(--bg);
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.9rem;
  color: var(--green);
  margin-top: 0.5rem;
}
.install-panel p {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}
/* Pure CSS tab switching */
#tab-mac:checked   ~ .panel-mac,
#tab-deb:checked   ~ .panel-deb,
#tab-flat:checked  ~ .panel-flat,
#tab-src:checked   ~ .panel-src { display: block; }

/* ── Why VimCode ────────────────────────────────────────────────────────── */
.why {
  padding: 4rem 0;
}
.why h2 {
  text-align: center;
  font-size: 2rem;
  color: var(--fg-bright);
  margin-bottom: 2rem;
}
.comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}
.comparison-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}
.comparison-card h3 {
  font-size: 1rem;
  color: var(--yellow);
  margin-bottom: 0.75rem;
}
.comparison-card p {
  font-size: 0.9rem;
  line-height: 1.55;
}

/* ── Footer ─────────────────────────────────────────────────────────────── */
.footer {
  background: var(--footer-bg);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 3rem;
}
.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}
.footer-links a { color: var(--muted); font-size: 0.85rem; }
.footer-links a:hover { color: var(--fg); }
.footer-copy {
  color: var(--muted);
  font-size: 0.8rem;
}

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav .container { gap: 1rem; }
  .nav-links { gap: 0.75rem; }
  .hero { padding: 3rem 0 2.5rem; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .badges { gap: 1rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .comparison-grid { grid-template-columns: 1fr; }
  .footer .container { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .nav-links .nav-hide-mobile { display: none; }
  .btn { padding: 0.45rem 1rem; font-size: 0.85rem; }
}