* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: system-ui, -apple-system, sans-serif; background: #f9f9f9; color: #1a1a1a; }
header { background: #fff; border-bottom: 1px solid #e5e5e5; padding: 2rem; text-align: center; }
h1 { font-size: 2rem; font-weight: 700; color: #16a34a; }
.tagline { color: #555; margin: 0.5rem 0 1.25rem; }
#search { width: 100%; max-width: 480px; padding: 0.75rem 1rem; border: 1px solid #ddd; border-radius: 8px; font-size: 1rem; }
main { max-width: 900px; margin: 2rem auto; padding: 0 1rem; display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card { background: #fff; border: 1px solid #e5e5e5; border-radius: 10px; padding: 1.25rem; }
.card h2 { font-size: 1rem; font-weight: 600; margin-bottom: 0.4rem; }
.difficulty { display: inline-block; font-size: 0.75rem; padding: 2px 8px; border-radius: 20px; margin-bottom: 0.6rem; font-weight: 500; }
.d1, .d2 { background: #dcfce7; color: #166534; }
.d3 { background: #fef9c3; color: #854d0e; }
.d4, .d5 { background: #fee2e2; color: #991b1b; }
.steps { font-size: 0.85rem; color: #444; padding-left: 1.2rem; }
.steps li { margin-bottom: 0.25rem; }
.friction { font-size: 0.8rem; color: #92400e; background: #fffbeb; padding: 0.4rem 0.6rem; border-radius: 6px; margin-top: 0.6rem; }
.cancel-btn { display: block; margin-top: 0.75rem; text-align: center; background: #16a34a; color: #fff; text-decoration: none; padding: 0.5rem; border-radius: 6px; font-size: 0.875rem; }
.cancel-btn:hover { background: #15803d; }
footer { text-align: center; padding: 2rem; color: #888; font-size: 0.85rem; }
footer a { color: #16a34a; }