* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f4f6f9;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

.login-container {
    background-color: #ffffff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    transition: transform 0.2s ease;
}

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

.login-header h2 {
    color: #333333;
    font-size: 24px;
    margin-bottom: 8px;
}

.login-header p {
    color: #666666;
    font-size: 14px;
}

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

.input-group label {
    display: block;
    margin-bottom: 6px;
    color: #444444;
    font-size: 14px;
    font-weight: 600;
}

.input-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #cccccc;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input-group input:focus {
    border-color: #007bff;
    outline: none;
}

.input-group input.input-error {
    border-color: #e53e3e;
    background-color: #fffafb;
}
.input-group input.input-error:focus {
    box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.15);
}

.form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    font-size: 14px;
}

.remember-me {
    color: #666666;
    cursor: pointer;
}

.forgot-link {
    color: #007bff;
    text-decoration: none;
}

.forgot-link:hover {
    text-decoration: underline;
}

.submit-btn {
    width: 100%;
    padding: 12px;
    background-color: #007bff;
    border: none;
    border-radius: 4px;
    color: #ffffff;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

.submit-btn:hover {
    background-color: #0056b3;
}

.submit-btn:disabled {
    background-color: #a0aec0;
    cursor: not-allowed;
}

.login-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: #666666;
}

.login-footer a {
    color: #007bff;
    text-decoration: none;
}

.login-footer a:hover {
    text-decoration: underline;
}

.error-box {
    background-color: #fff5f5;
    border: 1px solid #fc8181;
    color: #c53030;
    padding: 12px 14px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 2px 4px rgba(229, 62, 62, 0.05);
    animation: slideDown 0.3s ease-out;
}

.error-icon {
    font-size: 16px;
}

.error-text {
    font-weight: 500;
    line-height: 1.4;
}

.hidden {
    display: none !important;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.shake {
    animation: shakeEffect 0.4s ease-in-out;
}

@keyframes shakeEffect {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-6px); }
    40%, 80% { transform: translateX(6px); }
}