/* EvaLumina — minimal technical-paper aesthetic */

:root {
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --fg: #111418;
  --fg-soft: #4a5159;
  --fg-muted: #7a818a;
  --border: #e4e7eb;
  --accent: #0a0a0a;
  --accent-fg: #ffffff;
  --link: #1a4fbd;
  --code-bg: #f1f3f5;
  --radius: 6px;
  --maxw: 1080px;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1014;
    --bg-alt: #15181d;
    --fg: #e8eaed;
    --fg-soft: #b6bcc4;
    --fg-muted: #8a929b;
    --border: #262a31;
    --accent: #f5f5f5;
    --accent-fg: #0e1014;
    --link: #7aa8ff;
    --code-bg: #1c2026;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 0.1em 0.4em;
  border-radius: 4px;
}

h1, h2, h3, h4 { color: var(--fg); line-height: 1.25; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 700; margin: 0 0 1rem; letter-spacing: -0.02em; }
h2 { font-size: 1.8rem; font-weight: 600; margin: 0 0 1.5rem; }
h3 { font-size: 1.2rem; font-weight: 600; margin: 2.5rem 0 1rem; }
h4 { font-size: 1rem; font-weight: 600; margin: 0 0 0.5rem; }

/* HEADER */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 62px;
}
.logo {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.logo span { color: var(--fg-muted); }
.logo:hover { text-decoration: none; }

.nav-links {
  display: flex;
  gap: 1.4rem;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  color: var(--fg-soft);
  font-size: 0.92rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--fg); text-decoration: none; }

.lang-switch {
  display: flex;
  gap: 2px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2px;
}
.lang-switch button {
  background: none;
  border: 0;
  color: var(--fg-muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: all .15s;
}
.lang-switch button:hover { color: var(--fg); }
.lang-switch button.active {
  background: var(--accent);
  color: var(--accent-fg);
}

/* HERO */
.hero {
  padding: 5rem 0 3rem;
  border-bottom: 1px solid var(--border);
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-muted);
  margin: 0 0 1rem;
}
.lede {
  font-size: 1.3rem;
  color: var(--fg-soft);
  margin: 0 0 1rem;
}
.lede strong { color: var(--fg); font-weight: 600; }
.hero-body {
  font-size: 1.05rem;
  color: var(--fg-soft);
  max-width: 36rem;
  margin: 0 0 2rem;
}
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* BUTTONS */
.btn {
  display: inline-block;
  padding: 0.7rem 1.3rem;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .15s;
}
.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
}
.btn-primary:hover { opacity: 0.88; text-decoration: none; }
.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--bg-alt); text-decoration: none; }

/* SCREENSHOTS */
.screenshots {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin: 4rem auto 3rem;
}
.screenshots figure {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-alt);
  overflow: hidden;
}
.screenshots img {
  width: 100%;
  height: auto;
  display: block;
  border-bottom: 1px solid var(--border);
}
.screenshots figcaption {
  padding: 0.65rem 0.9rem;
  font-size: 0.82rem;
  color: var(--fg-muted);
  font-family: var(--mono);
}

/* MANIFESTO */
.manifesto {
  margin: 3rem 0 0;
  padding: 2rem 2.25rem;
  border-left: 3px solid var(--fg);
  background: var(--bg-alt);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.manifesto p {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--fg);
  margin: 0 0 1rem;
  line-height: 1.6;
}
.manifesto footer {
  font-size: 0.9rem;
  color: var(--fg-muted);
  font-family: var(--mono);
}
.manifesto cite { font-style: normal; color: var(--fg-soft); }

/* SECTIONS */
.section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--border);
}
.section-alt { background: var(--bg-alt); }
.muted { color: var(--fg-muted); margin-top: -0.75rem; margin-bottom: 2rem; }

/* GRIDS */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  background: var(--bg);
}
.card ol { padding-left: 1.2rem; margin: 0.5rem 0 0; color: var(--fg-soft); }
.card li { margin-bottom: 0.4rem; }

/* STEPS */
.steps {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  gap: 1rem;
}
.steps li {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}
.step-n {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.1rem;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: var(--accent-fg);
  border-radius: 50%;
  flex-shrink: 0;
}
.steps p { margin: 0; color: var(--fg-soft); }

/* DOWNLOAD CARDS */
.dl-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 1.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--fg);
  transition: all .15s;
}
.dl-card:hover { transform: translateY(-2px); border-color: var(--fg-soft); text-decoration: none; }
.dl-card svg { color: var(--fg); margin-bottom: 0.5rem; }
.dl-card h4 { margin: 0; }
.dl-card p { margin: 0; color: var(--fg-muted); font-size: 0.9rem; }
.dl-card.disabled { opacity: 0.5; pointer-events: none; }

.badge {
  margin-top: 0.5rem;
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-fg);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.badge-muted { background: var(--border); color: var(--fg-muted); }

/* PRICING */
.pricing { margin-top: 2rem; }
.plan {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  background: var(--bg);
  display: flex;
  flex-direction: column;
}
.plan-featured {
  border-color: var(--fg);
  border-width: 2px;
}
.plan h3 { margin: 0 0 0.5rem; font-size: 1.25rem; display: flex; align-items: center; gap: 0.5rem; }
.tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--bg-alt);
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.tag-pro { background: var(--accent); color: var(--accent-fg); }
.price {
  font-size: 2.4rem;
  font-weight: 700;
  margin: 0.5rem 0 1.25rem;
  font-family: var(--mono);
  letter-spacing: -0.02em;
}
.price-sub { font-size: 1rem; color: var(--fg-muted); font-weight: 400; }
.plan ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.75rem;
  flex: 1;
}
.plan li {
  padding: 0.4rem 0;
  color: var(--fg-soft);
  border-bottom: 1px solid var(--border);
}
.plan li::before { content: "→ "; color: var(--fg-muted); font-family: var(--mono); }
.plan li:last-child { border-bottom: 0; }

/* FOOTER */
.site-footer {
  padding: 2.5rem 0;
  text-align: center;
  color: var(--fg-muted);
  font-size: 0.88rem;
  background: var(--bg-alt);
}
.site-footer p { margin: 0.25rem 0; }

/* RESPONSIVE */
@media (max-width: 800px) {
  .nav-links { display: none; }
  .screenshots { grid-template-columns: 1fr; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .hero { padding: 3rem 0 2rem; }
  .section { padding: 3.5rem 0; }
}