/* ============================================================
   Black Triangle — website styles
   Black & white. Monospace for headings. Nothing else.
   ============================================================ */

:root {
  --bg: #000000;
  --bg-elev: #0d0d0d;
  --bg-hover: #1a1a1a;
  --border: #1f1f1f;
  --border-strong: #2a2a2a;
  --fg: #ffffff;
  --fg-dim: #888888;
  --accent: #ffffff;
  --accent-fg: #000000;

  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --max: 1100px;
  --t-fast: 150ms ease-out;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--fg); text-decoration: none; }
img { max-width: 100%; display: block; }

section {
  padding: 96px 24px;
  max-width: var(--max);
  margin: 0 auto;
}

.section-title {
  font-family: var(--mono);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 8px 0;
}

.section-sub {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg-dim);
  margin: 0 0 32px 0;
}

/* ============================================================
   Header
   ============================================================ */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo {
  width: 24px;
  height: 24px;
}

.brand-name {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  gap: 24px;
}

.site-nav a {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-dim);
  transition: color var(--t-fast);
}

.site-nav a:hover {
  color: var(--fg);
}

/* ============================================================
   Hero
   ============================================================ */

.hero {
  text-align: center;
  padding: 120px 24px 80px;
}

.hero-logo {
  width: 96px;
  height: 96px;
  margin: 0 auto 32px;
}

.hero-title {
  font-family: var(--mono);
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 0 0 16px 0;
  line-height: 1.2;
}

.hero-sub {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--fg-dim);
  margin: 0 0 32px 0;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border: 1px solid var(--border-strong);
  font-family: var(--mono);
  font-size: 13px;
  transition: background var(--t-fast), border-color var(--t-fast);
}

.btn:hover {
  background: var(--bg-hover);
  border-color: var(--fg-dim);
}

.btn-primary {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

.btn-primary:hover {
  background: var(--fg-dim);
  border-color: var(--fg-dim);
}

/* ============================================================
   Flags / Earth
   ============================================================ */

.flags-section {
  text-align: center;
}

.earth-stage {
  display: flex;
  justify-content: center;
  margin-top: 32px;
}

.earth-gif {
  width: 320px;
  height: 320px;
  image-rendering: pixelated;
}

/* ============================================================
   Features
   ============================================================ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.feature {
  padding: 24px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
}

.feature h3 {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 8px 0;
  letter-spacing: 0.02em;
}

.feature p {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-dim);
  margin: 0;
  line-height: 1.5;
}

/* ============================================================
   Download — TUTTO IN MONO
   ============================================================ */

.download-section {
  text-align: center;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.download-card {
  display: block;
  padding: 20px 16px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  transition: border-color var(--t-fast), background var(--t-fast);
  text-align: center;
}

.download-card:hover {
  border-color: var(--border-strong);
  background: var(--bg-hover);
}

.dl-name {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: 0.02em;
}

.dl-detail {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-dim);
  margin-top: 6px;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.dl-note {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-dim);
  margin-top: 6px;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

/* ============================================================
   How it works
   ============================================================ */

.how-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.how-step {
  padding: 24px 0;
}

.step-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-dim);
  display: block;
  margin-bottom: 8px;
}

.how-step h3 {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 8px 0;
  letter-spacing: 0.02em;
}

.how-step p {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-dim);
  margin: 0;
  line-height: 1.5;
}

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
  padding: 48px 24px;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer-logo {
  width: 32px;
  height: 32px;
  margin: 0 auto;
  opacity: 0.5;
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 640px) {
  .hero-title { font-size: 28px; }
  .site-nav { display: none; }
  section { padding: 64px 16px; }
}


/* Inverti il colore del logo nell'header (per sfondo scuro) */
.logo-white {
  filter: invert(1);
}