/* ログイン画面スタイル */

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

body {
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: linear-gradient(135deg, #f9fafb 0%, #f0f9ff 100%);
    color: #333;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    padding: 2.5rem 2rem;
}

.logo-section {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-img {
    width: 140px;
    height: 140px;
    object-fit: contain;
    margin: 0 auto 1rem;
}

.system-description {
    font-size: 0.875rem;
    color: #6b7280;
    margin-bottom: 0.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: #374151;
    margin-bottom: 0.5rem;
}

.form-label i {
    color: #9ca3af;
    margin-right: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-family: 'Inter', sans-serif;
    transition: all 0.2s;
    background: #f9fafb;
}

.form-input:focus {
    outline: none;
    border-color: #3b82f6;
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.error-message {
    margin-top: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 6px;
    font-size: 0.8125rem;
    color: #dc2626;
}

.alert {
    padding: 0.875rem 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
}

.alert-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #dc2626;
}

.alert-info {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: #1e40af;
}

.alert i {
    margin-right: 0.5rem;
}

.btn-submit {
    width: 100%;
    padding: 0.875rem 1.5rem;
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-submit:hover {
    background: linear-gradient(135deg, #2563eb, #1e40af);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.btn-submit:active {
    transform: translateY(0);
}

.copyright {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.75rem;
    color: #6b7280;
}

/* レスポンシブ対応 */
@media (max-width: 640px) {
    .login-card {
        padding: 2rem 1.5rem;
    }
    
    .logo-img {
        width: 120px;
        height: 120px;
    }
}