css.css

body {
    font-family: "Geologica", sans-serif;
    color: #f0f0ff;
    background: linear-gradient(-45deg, #1b1229, #150f2b, #231746, #0f0820);
    background-size: 400% 400%;
    animation: gradientMove 15s ease infinite;
    padding: 0px 30px;
    overflow-x: hidden;
    max-width: 900px;
    margin: 0px auto 50px auto; 
    box-sizing: border-box;
    text-align: center;
    animation: bgMove 15s ease infinite alternate;
    user-select: none;
}

h1, h2 {
    text-align: center;
    color: #c4b5fd;
}

ul {
    list-style-type: none;
    padding: 0;
    margin: 10px auto;
    display: inline-block;
    text-align: left;
}

section, .form-group {
    text-align: center;
}

section {
    background: rgba(31,25,65,0.8);
    padding: 20px;
    margin: 20px 0;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    box-shadow: 0 0 15px rgba(0,0,0,0.5);
    opacity: 0;
    animation: fadeIn 1s forwards;
}
section:nth-of-type(1) { animation-delay: 0.2s; }
section:nth-of-type(2) { animation-delay: 0.4s; }
section:nth-of-type(3) { animation-delay: 0.6s; }

button {
    padding: 12px 25px;
    border-radius: 10px;
    border: none;
    background: #6246f0;
    color: white;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.3s;
    box-shadow: 0 0 15px rgba(196,181,253,0.4);
    width: 100%;
    max-width: 300px;
    display: block;
    margin: 10px auto;
    min-height: 50px;
    max-height: 50px;
}

button:hover {
    transform: scale(1.1);
}

footer {
    text-align: center;
    padding: 15px;
    background: rgba(27,22,55,0.8);
    border-radius: 8px;
}

footer a {
    color: #c4b5fd;
    margin: 0 6px;
    text-decoration: none;
}

footer a:hover {
    color: #fff;
}

input[type="number"], select {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    background: rgba(27,18,41,0.8);
    border: none;
    color: white;
    backdrop-filter: blur(5px);
    box-shadow: 0 0 5px rgba(196,181,253,0.3);
}

input[type="number"] {
    width: 97.7%;
}

input:focus, select:focus {
    outline: none;
    box-shadow: 0 0 20px rgba(255,255,255,0.6);
}

#baseMaterialsButtons {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
    max-width: 800px;
    margin: 10px auto;
}

#targetMaterial {
    color: #c4b5fd;
    font-size: 70px;
}

.base-btn {
    padding: 6px 10px;
    margin: 0;
    font-size: 14px;
    width: 100%;
    box-sizing: border-box;
    border-radius: 6px;
    background: #785af0;
    color: #fff;
    border: none;
    cursor: pointer;
    transition: transform 0.2s;
}

.base-btn:hover {
    transform: scale(1.05);
}

.modal {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 9999;
}

.modal.active {
    opacity: 1;
    pointer-events: all; 
    animation: fadeIn 0.5s forwards;
}

.modal-content {
    background: #312457;
    padding: 30px;
    border-radius: 12px;
    color: white;
    text-align: center;
    box-shadow: 0 0 20px rgba(255,255,255,0.4);
}

.modal button {
    margin-top: 15px;
}

.particle {
    position: fixed;
    bottom: -5px;
    width: 4px;
    height: 4px;
    background: white;
    opacity: 0.7;
    border-radius: 50%;
    animation: float linear infinite;
}

.ripple {
    position: fixed;
    width: 10px; height: 10px;
    background: rgba(255,255,255,0.3);
    border-radius: 50%;
    transform: translate(-50%,-50%);
    animation: rippleEffect 0.8s ease-out;
    pointer-events: none;
}

.sandbox-toggle {
    text-align: center;
    margin: 20px 0;
    font-size: 18px;
}

.sandbox-toggle input[type="checkbox"] {
    transform: scale(1.5);
    margin-right: 10px;
}

.fade-in {
    animation: fadeIn 1s ease forwards;
}

@keyframes rippleEffect {
    to { transform: scale(15); opacity: 0; }
}

@keyframes bgMove {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes float {
    to { transform: translateY(-110vh); opacity: 0; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}