:root {
    /* Dark Mode (Default) */
    --primary-color: #0a192f;
    --secondary-color: #64ffda;
    --text-color: #ccd6f6;
    --light-navy: #112240;
    --slate: #8892b0;
    --card-shadow: rgba(0,0,0,0.7);
    --btn-hover: rgba(100, 255, 218, 0.1);
    --ball-size: 50px;
}

body.light-mode {
    --primary-color: #f0f2f5;
    --secondary-color: #007bff;
    --text-color: #1a1a1a;
    --light-navy: #ffffff;
    --slate: #4a4a4a;
    --card-shadow: rgba(0,0,0,0.1);
    --btn-hover: rgba(0, 123, 255, 0.1);
}

body {
    font-family: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
    background-color: var(--primary-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 1rem;
    transition: background-color 0.3s ease, color 0.3s ease;
    box-sizing: border-box;
}

.container {
    background-color: var(--light-navy);
    padding: 2.5rem 1.5rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 20px 40px -15px var(--card-shadow);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    width: 100%;
    max-width: 500px;
}

#theme-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: 1px solid var(--secondary-color);
    color: var(--secondary-color);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 0.3s ease;
}

h1 {
    color: var(--secondary-color);
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

p {
    color: var(--slate);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

.numbers-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin: 2rem 0;
}

.number {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    width: var(--ball-size);
    height: var(--ball-size);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.3rem;
    font-weight: bold;
    border: 2px solid var(--secondary-color);
    transition: transform 0.3s ease-in-out, background-color 0.3s ease, color 0.3s ease;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.number.animate {
    animation: pop-in 0.5s ease-out forwards;
}

@keyframes pop-in {
    0% { transform: scale(0); opacity: 0; }
    60% { transform: scale(1.2); opacity: 1; }
    100% { transform: scale(1); }
}

.actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

button {
    background-color: transparent;
    border: 1px solid var(--secondary-color);
    border-radius: 8px;
    color: var(--secondary-color);
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease-in-out;
    width: 100%;
}

button:hover {
    background-color: var(--btn-hover);
    box-shadow: 0 0 15px 0 var(--secondary-color);
}

#copy-btn {
    font-size: 0.9rem;
    border-color: var(--slate);
    color: var(--slate);
}

#copy-btn:hover {
    background-color: rgba(136, 146, 176, 0.1);
    border-color: var(--text-color);
    color: var(--text-color);
    box-shadow: none;
}

.separator {
    margin: 3rem 0;
    border: none;
    border-top: 1px solid var(--slate);
    opacity: 0.2;
}

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

.partnership-form h2 {
    color: var(--secondary-color);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    text-align: center;
}

.partnership-form p {
    text-align: center;
    margin-bottom: 2rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border-radius: 8px;
    border: 1px solid var(--slate);
    background-color: var(--primary-color);
    color: var(--text-color);
    font-family: inherit;
    font-size: 0.95rem;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.submit-btn {
    background-color: var(--secondary-color) !important;
    color: var(--primary-color) !important;
    border: none !important;
    margin-top: 1rem;
    border-radius: 8px !important;
}

.submit-btn:hover {
    box-shadow: 0 0 20px 0 var(--secondary-color) !important;
    opacity: 0.9;
}

.comments-section {
    margin-top: 2rem;
    padding-top: 1rem;
}

/* Responsive Adjustments */
@media (max-width: 480px) {
    :root {
        --ball-size: 45px;
    }
    
    .container {
        padding: 2rem 1rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    .numbers-container {
        gap: 0.5rem;
    }

    .number {
        font-size: 1.1rem;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 600px;
    }
    
    .actions {
        flex-direction: row;
    }
}