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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
    background: #f5f5f5;
    color: #333;
    line-height: 1.6;
    padding: 1rem;
}

header {
    text-align: center;
    padding: 2rem 0 1.5rem;
}

header h1 {
    font-size: 1.8rem;
    color: #2c3e50;
}

.subtitle {
    color: #888;
    font-size: 0.9rem;
    margin-top: 0.3rem;
}

main {
    max-width: 700px;
    margin: 0 auto;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.card-date {
    display: block;
    padding: 0.8rem 1rem 0;
    color: #888;
    font-size: 0.85rem;
    font-weight: 600;
}

.card-image {
    width: 100%;
    display: block;
    margin-top: 0.5rem;
    border-radius: 0;
}

.card-text {
    padding: 1rem;
    white-space: pre-line;
    font-size: 0.95rem;
}

.card-text b {
    color: #2c3e50;
}

.card-text i {
    color: #7f8c8d;
}

.empty {
    text-align: center;
    padding: 3rem;
    color: #888;
    font-size: 1.1rem;
}

footer {
    text-align: center;
    padding: 2rem 0;
    color: #aaa;
    font-size: 0.8rem;
}