body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    background-color: #0a0a0a;
    color: #ffffff;
}

.container {
    background: #1a1a1a;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: #00ff88;
    letter-spacing: -1px;
}

.info-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: #242424;
    border-radius: 8px;
    border: 1px solid #333;
}

.info-title {
    font-size: 1.2rem;
    color: #00ff88;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.header-section {
    margin-top: 2rem;
}

.header-item {
    padding: 0.75rem;
    border-bottom: 1px solid #333;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-item:hover {
    background-color: #2a2a2a;
    transition: background-color 0.2s ease;
}

.header-key {
    font-weight: 600;
    color: #00ff88;
    min-width: 150px;
}

.header-value {
    color: #cccccc;
    word-break: break-all;
    flex: 1;
    margin-left: 1rem;
}

.nav-links {
    list-style: none;
    padding: 0;
    margin-top: 2rem;
    display: grid;
    gap: 1rem;
}

.nav-links li {
    margin: 0.5rem 0;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 1rem;
    background-color: #242424;
    border: 1px solid #333;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.nav-link:hover {
    background-color: #2a2a2a;
    border-color: #00ff88;
    transform: translateY(-2px);
}

.link-title {
    color: #00ff88;
    font-weight: 600;
    font-size: 1.1rem;
}

.link-description {
    color: #888;
    margin-left: 1rem;
    font-size: 0.9rem;
}

.status-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    background: #00ff8833;
    color: #00ff88;
    font-size: 0.8rem;
    margin-left: 0.5rem;
}

/* 結果表示用のスタイル（sleep.htmlで使用） */
.result-badge {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 8px;
    background: #00ff8833;
    color: #00ff88;
    font-size: 2rem;
    font-weight: bold;
    margin: 2rem 0;
    text-align: center;
}

.result-badge .unit {
    font-size: 1rem;
    opacity: 0.8;
    margin-left: 0.5rem;
}

.input-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
}

.input-field {
    background: #333;
    border: 1px solid #444;
    color: #fff;
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 1rem;
    width: 150px;
}

.input-field:focus {
    outline: none;
    border-color: #00ff88;
}

.action-button {
    background: #00ff88;
    color: #000;
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

.action-button:hover {
    background: #00cc6a;
    transform: translateY(-2px);
}

label {
    color: #888;
    font-size: 0.9rem;
}