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

body {
    background: #f4f6f9;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-container {
    background: #ffffff;
    padding: clamp(24px, 4vw, 40px);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    width: min(100%, 420px);
}

.login-logo {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.login-logo img {
    width: min(100px, 30vw);
    height: auto;
    object-fit: contain;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

h2 {
    color: #333;
    margin-bottom: 8px;
    text-align: center;
    font-size: clamp(1.2rem, 3.5vw, 1.8rem);
}

.subtitle {
    color: #777;
    font-size: clamp(0.9rem, 2.2vw, 1rem);
    margin-bottom: 24px;
    text-align: center;
}

.error-box,
.success-box {
    padding: 12px;
    border-radius: 6px;
    font-size: 14px;
    margin-bottom: 20px;
}

.error-box {
    background: #ffebe9;
    color: #ff3b30;
    border: 1px solid #ffdad6;
}

.success-box {
    background: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #c8e6c9;
}

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

.input-group label {
    display: block;
    margin-bottom: 6px;
    color: #555;
    font-size: 14px;
    font-weight: 500;
}

.input-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 15px;
    transition: border-color 0.2s;
}

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

.remember-group {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: -4px 0 20px;
    color: #555;
    font-size: 14px;
}

.remember-group input {
    width: 16px;
    height: 16px;
    accent-color: #007bff;
}

.remember-group label {
    cursor: pointer;
}

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

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

@media (max-width: 480px) {
    body {
        padding: 16px;
    }

    .login-container {
        padding: 24px 18px;
    }

    .remember-group {
        align-items: flex-start;
    }
}