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

:root {
  --blue: #3d63dd;
  --blue-light: #ebf0ff;
  --blue-dark: #2f4fc4;
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --bg: #ffffff;
  --radius: 10px;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

/* NAV */

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 56px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.brand {
  font-size: 1rem;
  font-weight: 700;
  color: var(--blue);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-link:hover {
  color: var(--text);
}

/* HERO */

.hero {
  background: var(--blue);
  padding: 5rem 2rem;
  text-align: center;
}

.hero-content {
  max-width: 600px;
  margin: 0 auto;
}

.hero-title {
  font-size: 1.75rem;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.hero-sub {
  margin-top: 0.75rem;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.7);
}

.hero-sub em {
  font-style: italic;
}

/* TOOLS */

.tools {
  padding: 4rem 2rem;
}

.container {
  max-width: 900px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--blue);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
}

/* GRID */

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

@media (max-width: 600px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

/* CARD */

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: box-shadow 0.15s;
}

.card:hover {
  box-shadow: 0 2px 12px rgba(61, 99, 221, 0.08);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.card-header h3 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ICONS */

.app-icon {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: 6px;
  flex-shrink: 0;
}

.card-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
  flex: 1;
}

.card-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.25rem;
}

/* BUTTONS */

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--blue);
  color: #ffffff;
}

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

.btn-secondary {
  background: transparent;
  color: var(--blue);
  border-color: var(--blue);
}

.btn-secondary:hover {
  background: var(--blue-light);
}

/* FOOTER */

footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
}

.footer-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-link {
  color: var(--blue);
  text-decoration: none;
  font-weight: 600;
}

.footer-link:hover {
  text-decoration: underline;
}