* {
    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;
    justify-content: center;
    align-items: center;
    color: #fff;
}

.login-container {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    width: 100%;
    max-width: 450px;
    animation: fadeIn 0.5s ease;
}

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

.logo-container {
    text-align: center;
    margin-bottom: 2rem;
}

.logo {
    max-width: 150px;
    height: auto;
    filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.3));
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.login-container h2 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2rem;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.2);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
    user-select: none;
}

.form-group label:hover {
    transform: scale(1.05);
}

.form-group input {
    width: 100%;
    padding: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: #fff;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.form-group input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

.login-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 10px;
    color: #fff;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

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

.error-message {
    background: rgba(239, 68, 68, 0.3);
    border: 1px solid rgba(239, 68, 68, 0.5);
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1rem;
    text-align: center;
    display: none;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.error-message.show {
    display: block;
}

.info-footer {
    text-align: center;
    margin-top: 2rem;
    opacity: 0.7;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .login-container {
        padding: 2rem;
        margin: 1rem;
    }

    .logo {
        max-width: 100px;
    }

    .login-container h2 {
        font-size: 1.5rem;
    }
}