:root {
  --bg: #fafaf7;
  --bg-card: #ffffff;
  --fg: #1a1d24;
  --fg-muted: #6b7280;
  --fg-subtle: #9ca3af;
  --border: #e8e8e3;
  --border-hover: #d1d5db;
  --radius: 18px;

  --pdf: #e11d48;
  --pdf-soft: #ffe4e8;
  --presta: #f97316;
  --presta-soft: #ffedd5;
  --sharepane: #2563eb;
  --sharepane-soft: #dbeafe;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

.backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 10% 0%, rgba(225, 29, 72, 0.06), transparent 40%),
    radial-gradient(circle at 90% 10%, rgba(249, 115, 22, 0.06), transparent 45%),
    radial-gradient(circle at 50% 100%, rgba(37, 99, 235, 0.06), transparent 50%),
    var(--bg);
}

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 96px 28px 56px;
}

.hero {
  margin-bottom: 64px;
  text-align: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--fg-muted);
  margin-bottom: 32px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

.brand .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15);
}

.brand-name {
  font-weight: 500;
  color: var(--fg);
}

h1 {
  font-size: clamp(34px, 5vw, 48px);
  font-weight: 650;
  letter-spacing: -0.025em;
  margin: 0 0 16px;
  color: var(--fg);
}

.subtitle {
  color: var(--fg-muted);
  font-size: 18px;
  margin: 0 auto;
  max-width: 560px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
  margin-bottom: 72px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.card-icon {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  margin-bottom: 24px;
  transition: transform 0.25s ease;
}

.card:hover .card-icon {
  transform: scale(1.05);
}

.card-icon svg {
  width: 40px;
  height: 40px;
}

.card--pdf .card-icon {
  background: var(--pdf-soft);
  color: var(--pdf);
}

.card--presta .card-icon {
  background: var(--presta-soft);
  color: var(--presta);
}

.card--sharepane .card-icon {
  background: var(--sharepane-soft);
  color: var(--sharepane);
}

.card h2 {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 10px;
  letter-spacing: -0.015em;
  color: var(--fg);
}

.card p {
  font-size: 15px;
  color: var(--fg-muted);
  margin: 0 0 24px;
  flex: 1;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: -0.01em;
  color: var(--fg-subtle);
}

.card--pdf .card-link { color: var(--pdf); }
.card--presta .card-link { color: var(--presta); }
.card--sharepane .card-link { color: var(--sharepane); }

.arrow {
  transition: transform 0.2s ease;
  display: inline-block;
}

.card:hover .arrow {
  transform: translateX(4px);
}

footer {
  text-align: center;
  color: var(--fg-subtle);
  font-size: 13px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

@media (max-width: 640px) {
  main {
    padding: 64px 20px 32px;
  }
  .hero {
    margin-bottom: 44px;
  }
  .card {
    padding: 26px;
  }
  .card-icon {
    width: 64px;
    height: 64px;
  }
  .card-icon svg {
    width: 34px;
    height: 34px;
  }
}