body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; padding: 20px; max-width: 600px; margin: 0 auto; background-color: #fafafa; }
header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
h1, h2 { color: #333; }
input, button { display: block; width: 100%; margin-bottom: 15px; padding: 12px; font-size: 16px; border: 1px solid #ddd; border-radius: 8px; box-sizing: border-box;}
button { background: #007bff; color: white; border: none; cursor: pointer; font-weight: bold; }
button:active { background: #0056b3; }
ul { list-style: none; padding: 0; }
li { background: white; padding: 15px; margin-bottom: 10px; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.05); display: flex; justify-content: space-between; }
.time { color: #666; font-size: 0.9em; }