/* Reset default styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex=-webkit-flex;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.container {
    max-width: 400px;
    width: 100%;
    padding: 20px;
}

.login-box {
    background: rgba(255, 255, 255, 0.95);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}

.login-box:hover {
    transform: translateY(-5px);
}

h2 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
    font-size: 28px;
    font-weight: 600;
}

.alert {
    background: #ff4d4d;
    color: white;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    font-size: 14px;
}

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

.input-group label {
    display: block;
    color: #555;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
}

.input-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.8);
}

.input-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 8px rgba(102, 126, 234, 0.3);
}

button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(to right, #667eea, #764ba2);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
}

button:hover:not(:disabled) {
    background: linear-gradient(to right, #764ba2, #667eea);
    transform: translateY(-2px);
}

button:disabled {
    background: #cccccc;
    cursor: not-allowed;
}

/* Animation for form appearance */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-box {
    animation: slideIn 0.5s ease-out;
}

/* Responsive design */
@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    
    .login-box {
        padding: 30px 20px;
    }
    
    h2 {
        font-size: 24px;
    }
    
    button {
        padding: 12px;
    }
}

/* Subtle background animation */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    animation: gradient 15s ease infinite;
    z-index: -1;
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}