@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

:root {
    --primary-color: #4a90e2;
    --secondary-color: #50e3c2;
    --background-color: #f0f4f8;
    --text-color: #333;
    --container-bg: #ffffff;
    --disabled-color: #bdc3c7;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

.main-container {
    text-align: center;
    background-color: var(--container-bg);
    padding: 40px 50px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    width: 90%;
    max-width: 500px;
}

.logo-container h1 {
    font-weight: 700;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.logo-container p {
    font-weight: 300;
    font-size: 1.1rem;
    color: #7f8c8d;
    margin-bottom: 30px;
}

.login-box #usernameInput {
    width: 100%;
    padding: 15px;
    font-size: 1rem;
    border: 2px solid #dfe6e9;
    border-radius: 10px;
    margin-bottom: 20px;
    transition: border-color 0.3s;
}

.login-box #usernameInput:focus {
    outline: none;
    border-color: var(--primary-color);
}

.mode-selection {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.mode-selection button {
    padding: 15px;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    width: 100%;
}

.mode-selection button:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

#individualModeBtn {
    background: linear-gradient(45deg, var(--primary-color), #4a76e2);
    color: white;
}

#interactiveModeBtn {
    background-color: var(--disabled-color);
    color: #6c757d;
    cursor: not-allowed;
}

.footer-info {
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

.username-display {
    font-weight: 600;
    color: var(--primary-color);
    background: rgba(255, 255, 255, 0.7);
    padding: 5px 10px;
    border-radius: 5px;
}

.info-button {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    border: none;
    background-color: var(--primary-color);
    color: white;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: background-color 0.3s;
}

.info-button:hover {
    background-color: #3a7ac2;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s;
}

.modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 30px;
    border: 1px solid #888;
    width: 80%;
    max-width: 600px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    animation: slideIn 0.4s;
}

.close-btn {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close-btn:hover,
.close-btn:focus {
    color: black;
}

@keyframes fadeIn {
    from {opacity: 0;}
    to {opacity: 1;}
}

@keyframes slideIn {
    from {transform: translateY(-50px);}
    to {transform: translateY(0);}
}

.header-logo {
    max-height: 80px;
    margin-bottom: 15px;
}


/* Responsive Design */
@media (max-width: 550px) {
    body {
        padding: 20px;
    }
    .main-container {
        padding: 30px 25px;
        width: 100%;
    }
    .logo-container h1 {
        font-size: 2rem;
    }
    .logo-container p {
        font-size: 1rem;
    }
    .login-box #usernameInput,
    .mode-selection button {
        padding: 12px;
        font-size: 1rem;
    }
}