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

:root {
  --bg: #0a0a0a;
  --surface: #141414;
  --text: #e8e8e8;
  --text-muted: #888;
  --accent: #4a90ff;
  --accent-hover: #6aa4ff;
  --red: #e05050;
  --green: #50c878;
  --radius: 12px;
  --max-width: 960px;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

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

/* Hero */

.hero {
  padding: 80px 0 60px;
}

.hero .container {
  display: flex;
  align-items: center;
  gap: 60px;
}

.hero-content {
  flex: 1;
}

h1 {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.tagline {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-top: 8px;
}

.description {
  margin-top: 20px;
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 480px;
}

.cta-buttons {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.2s, opacity 0.2s;
}

.btn-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-disabled {
  background: var(--surface);
  color: var(--text-muted);
  cursor: default;
  opacity: 0.6;
}

.web-link {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.web-link a:hover {
  text-decoration: underline;
}

/* Screenshot placeholder */

.hero-screenshot {
  flex-shrink: 0;
}

.screenshot-placeholder {
  width: 240px;
  height: 240px;
  border-radius: 50%;
  border: 6px solid var(--red);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: radial-gradient(circle, rgba(224, 80, 80, 0.08) 0%, transparent 70%);
}

.placeholder-ring {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 6px solid transparent;
  border-top-color: var(--green);
  border-right-color: var(--green);
  transform: rotate(-45deg);
}

.placeholder-time {
  font-size: 3rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

/* Features */

.features {
  padding: 60px 0;
  background: var(--surface);
}

.features h2 {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 40px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Highlights */

.highlights {
  padding: 48px 0;
}

.highlight-list {
  list-style: none;
  columns: 2;
  column-gap: 48px;
}

.highlight-list li {
  padding: 8px 0 8px 20px;
  position: relative;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.highlight-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* Footer */

footer {
  padding: 32px 0;
  border-top: 1px solid #222;
}

footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-text {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text);
}

/* Responsive */

@media (max-width: 768px) {
  .hero {
    padding: 48px 0 40px;
  }

  .hero .container {
    flex-direction: column;
    text-align: center;
    gap: 40px;
  }

  h1 {
    font-size: 2.5rem;
  }

  .description {
    margin-left: auto;
    margin-right: auto;
  }

  .cta-buttons {
    justify-content: center;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .highlight-list {
    columns: 1;
  }

  footer .container {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 2rem;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .screenshot-placeholder {
    width: 180px;
    height: 180px;
  }

  .placeholder-time {
    font-size: 2.2rem;
  }
}