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

body { 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #a78bfa 0%, #c084fc 50%, #e879f9 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-box {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px);
    border: 2px solid rgba(255, 255, 255, 0.25);
    padding: 3rem 2.5rem;
    border-radius: 50%;
    width: 420px;
    height: 420px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 32px rgba(167, 139, 250, 0.4);
}

.login-box h1 { 
    text-align: center; 
    margin-bottom: 2rem;
    color: white;
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.login-box input[type="text"],
.login-box input[type="password"] {
    width: 100%;
    padding: 0.9rem 1.2rem;
    margin-bottom: 1.2rem;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 25px;
    font-size: 0.95rem;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    text-align: center;
    transition: all 0.3s ease;
}

.login-box input::placeholder {
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.login-box input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.7);
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.3);
}

.login-box button {
    width: 100%;
    padding: 0.9rem;
    background: rgba(167, 139, 250, 0.6);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.login-box button:hover { 
    background: rgba(167, 139, 250, 0.8);
    border-color: rgba(255, 255, 255, 0.6);
    box-shadow: 0 5px 15px rgba(167, 139, 250, 0.5);
    transform: translateY(-2px);
}

.remember {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: white;
    font-size: 0.9rem;
    cursor: pointer;
    margin-bottom: 0.5rem;
}

.remember input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #a78bfa;
}

.remember span {
    user-select: none;
}

.error { 
    background: rgba(255, 99, 99, 0.25);
    color: #fff;
    padding: 0.75rem;
    border-radius: 15px;
    margin-bottom: 1rem;
    border: 1px solid rgba(255, 99, 99, 0.5);
    text-align: center;
    font-size: 0.9rem;
    width: 100%;
}

.demo { 
    text-align: center;
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.85rem;
    margin-top: 0.5rem;
    line-height: 1.5;
}

.demo strong {
    color: white;
    font-weight: 600;
}

@media (max-width: 768px) {
    .login-box {
        width: 360px;
        height: 360px;
        padding: 2rem 2rem;
    }
    
    .login-box h1 {
        font-size: 1.3rem;
        margin-bottom: 1.5rem;
    }
    
    .login-box input {
        padding: 0.8rem 1rem;
        font-size: 0.9rem;
    }
    
    .login-box button {
        padding: 0.8rem;
        font-size: 0.95rem;
    }
}