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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #6f42c1 0%, #5a34a0 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
}

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

.login-box {
    background: white;
    border-radius: 10px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    padding: 40px;
    text-align: center;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.logo-icon {
    font-size: 48px;
    color: #6f42c1;
    margin-bottom: 15px;
}

.login-header h1 {
    color: #6f42c1;
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 8px;
}

.login-header p {
    color: #666;
    font-size: 16px;
}

.login-form {
    text-align: left;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
    font-size: 14px;
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group i {
    position: absolute;
    left: 12px;
    color: #6f42c1;
    font-size: 16px;
    z-index: 2;
}

.input-group input {
    width: 100%;
    padding: 12px 12px 12px 40px;
    border: 2px solid #e1e5e9;
    border-radius: 6px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: white;
}

.input-group input:focus {
    outline: none;
    border-color: #6f42c1;
    box-shadow: 0 0 0 3px rgba(111, 66, 193, 0.1);
}

.input-group input::placeholder {
    color: #adb5bd;
}

.login-btn {
    width: 100%;
    background: #6f42c1;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 10px;
}

.login-btn:hover {
    background: #5a34a0;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(111, 66, 193, 0.3);
}

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

.login-btn:disabled {
    background: #adb5bd;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 10px;
    border-radius: 6px;
    margin-top: 15px;
    border: 1px solid #f5c6cb;
    font-size: 14px;
    text-align: center;
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Loading state */
.login-btn.loading {
    position: relative;
    color: transparent;
}

.login-btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin: -8px 0 0 -8px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive design */
@media (max-width: 480px) {
    .login-container {
        padding: 10px;
    }
    
    .login-box {
        padding: 30px 25px;
    }
    
    .login-header h1 {
        font-size: 20px;
    }
    
    .logo-icon {
        font-size: 40px;
    }
}