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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 420px;
    padding: 40px;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 28px;
    color: #333;
    margin-bottom: 8px;
}

.login-header p {
    color: #666;
    font-size: 14px;
}

.tenant-badge {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    margin-top: 10px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.login-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.login-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.error-message {
    background: #fff5f5;
    border: 1px solid #feb2b2;
    color: #c53030;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.loading {
    display: none;
    text-align: center;
    padding: 10px;
    color: #666;
}

.loading.show {
    display: block;
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #e0e0e0;
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* テナント選択モーダル */
.tenant-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.tenant-modal.show {
    display: flex;
}

.tenant-modal-content {
    background: white;
    border-radius: 16px;
    padding: 30px;
    width: 90%;
    max-width: 400px;
    max-height: 80vh;
    overflow-y: auto;
}

.tenant-modal h2 {
    font-size: 20px;
    margin-bottom: 20px;
    text-align: center;
}

.tenant-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.tenant-item {
    padding: 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tenant-item:hover {
    border-color: #667eea;
    background: #f8f9ff;
}

.tenant-item-name {
    font-weight: 600;
    color: #333;
}

.tenant-item-role {
    font-size: 12px;
    color: #666;
    margin-top: 4px;
}