:root {
    --bg-color: #f4f4f7;
    --card-bg: #ffffff;
    --accent-color: #0078d4; /* PowerToys風のブルー */
    --text-main: #333;
    --text-sub: #666;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    padding: 60px 20px;
    text-align: center;
    background: linear-gradient(135deg, #2b2b2b 0%, #1a1a1a 100%);
    color: white;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    letter-spacing: -1px;
}

header h1 span {
    color: var(--accent-color);
    font-weight: 300;
}

header p {
    opacity: 0.7;
    font-weight: 300;
}

.container {
    max-width: 1000px;
    margin: -40px auto 40px;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    padding: 24px;
    position: relative;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(0,0,0,0.05);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    border-color: var(--accent-color);
}

.card-status {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 0.7rem;
    background: #eef2f6;
    padding: 2px 8px;
    border-radius: 10px;
    color: var(--text-sub);
}

.card h2 {
    margin: 10px 0;
    font-size: 1.4rem;
    color: var(--accent-color);
}

.card p {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-sub);
    flex-grow: 1;
}

.tags {
    margin: 15px 0;
    display: flex;
    gap: 8px;
}

.tag {
    font-size: 0.7rem;
    background: #f0f0f0;
    padding: 3px 10px;
    border-radius: 4px;
}

.useless-rate {
    font-size: 0.8rem;
    color: #e74c3c;
    font-weight: bold;
    margin-top: 10px;
}

/* 開発中のカード */
.card.disabled {
    opacity: 0.6;
    cursor: default;
    pointer-events: none;
    background: #fafafa;
}

footer {
    margin-top: auto;
    padding: 40px;
    text-align: center;
    font-size: 0.8rem;
    color: #999;
}