:root {
  --bg: #0c0c0c;
  --fg: #f5f5f5;
  --muted: #999;
  --accent: #ff8c42;
  --accent-soft: rgba(255, 140, 66, 0.15);
  --card: #1a1a1a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  width: min(720px, 92vw);
  margin: 0 auto;
  padding: 64px 0 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 48px;
}

/* ----- hero ----- */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.logo {
  width: 100%;
  max-width: 320px;
  height: auto;
  display: block;
}

.tagline {
  margin: 0;
  font-size: 18px;
  color: var(--muted);
  max-width: 460px;
}

/* ----- features ----- */
.features {
  background: var(--card);
  border-radius: 16px;
  padding: 24px 28px;
  width: 100%;
}

.features ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  text-align: left;
}

.features li {
  position: relative;
  padding-left: 28px;
  font-size: 15px;
}

.features li::before {
  content: "✦";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-size: 16px;
}

/* ----- cta ----- */
.cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  width: 100%;
}

.buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: transform 0.05s ease, background 0.15s ease,
              border-color 0.15s ease, color 0.15s ease;
  cursor: pointer;
  min-width: 160px;
}

.btn:active { transform: translateY(1px); }

.btn.primary {
  background: var(--accent);
  color: #1a0a00;
  border: 2px solid var(--accent);
}
.btn.primary:hover { background: #ff9d5e; border-color: #ff9d5e; }

.btn.secondary {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}
.btn.secondary:hover { background: var(--accent-soft); }

.btn.disabled,
.btn[aria-disabled="true"] {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.muted {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

/* ----- footer ----- */
footer {
  padding: 24px 16px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}

footer a {
  color: var(--muted);
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.2);
}
footer a:hover { color: var(--fg); }

/* ----- a11y helper ----- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ----- mobile ----- */
@media (max-width: 640px) {
  main { padding: 32px 0 16px; gap: 32px; }
  .logo { max-width: 240px; }
  .tagline { font-size: 16px; }
  .features { padding: 20px; }
  .btn { min-width: 140px; padding: 11px 20px; font-size: 14px; }
}