/* ========================================
   ログイン画面
   ======================================== */

#loginPage {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1e3a5f 0%, #3b82f6 50%, #60a5fa 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.login-card {
    background-color: #ffffff;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 48px 40px;
    width: 100%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    animation: loginCardIn 0.4s ease-out;
}

@keyframes loginCardIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-logo {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #3b82f6, #1e3a5f);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
}

.login-logo svg {
    width: 32px;
    height: 32px;
    stroke: #ffffff;
}

.login-title {
    font-size: 24px;
    font-weight: 700;
    color: #1a1a1a;
    margin: 0;
    text-align: center;
}

.login-subtitle {
    font-size: 13px;
    color: #6b7280;
    margin: 0 0 16px;
    text-align: center;
}

.login-form {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.login-field label {
    font-size: 13px;
    font-weight: 600;
    color: #374151;
}

.login-field input {
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 14px;
    color: #1a1a1a;
    background-color: #f9fafb;
    transition: all 0.2s;
    outline: none;
    font-family: inherit;
}

.login-field input:focus {
    border-color: #3b82f6;
    background-color: #ffffff;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.login-error {
    font-size: 13px;
    color: #ef4444;
    min-height: 18px;
    text-align: center;
}

.login-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
    margin-top: 4px;
}

.login-btn:hover {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
    transform: translateY(-1px);
}

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

.login-back-btn {
    width: 100%;
    padding: 10px;
    background: transparent;
    color: #6b7280;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.login-back-btn:hover {
    border-color: #9ca3af;
    color: #374151;
    background-color: #f9fafb;
}

.change-password-notice {
    font-size: 13px;
    color: #374151;
    background-color: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    padding: 10px 14px;
    margin: 0;
    text-align: center;
    line-height: 1.5;
}