:root {
    --primary-color: #0a0a0a;
    --accent-color: #ffaa00;
    --text-color: #e0e0e0;
    --danger-color: #ff4d4d;
    --font-family: "Caudex", serif;
}
* {
    user-select: none !important; /* Prevents text selection */
    -webkit-user-select: none !important;
    -moz-user-select: none !important;
    -ms-user-select: none !important;
    -webkit-tap-highlight-color: transparent !important;
    -webkit-touch-callout: none !important;
    -webkit-user-drag: none !important;
    -webkit-user-select: none !important;
    -webkit-tap-highlight-color: transparent !important;
    -webkit-touch-callout: none !important;
    -webkit-user-drag: none !important;
    -webkit-user-select: none !important;
    -webkit-tap-highlight-color: transparent !important;
    -webkit-touch-callout: none !important;
    -webkit-user-drag: none !important;
    -webkit-user-select: none !important;
    -webkit-tap-highlight-color: transparent !important;
    -webkit-touch-callout: none !important;
    -webkit-user-drag: none !important;
    /* disable canvas selection */
    -webkit-user-select: none !important;
    -webkit-tap-highlight-color: transparent !important;
    -webkit-touch-callout: none !important;
    -webkit-user-drag: none !important;
    -webkit-user-select: none !important;
    -webkit-tap-highlight-color: transparent !important;
}
body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: var(--primary-color);
    color: var(--text-color);
    font-family: var(--font-family);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    user-select: none; /* Prevents text selection */
}

#main-menu {
    background: url("./menu.png") no-repeat center center;
    background-size: cover;
    width: 100%;
    height: 100%;
}

.container {
    position: relative;
    width: 1280px;
    height: 720px;
}

canvas {
    background-color: transparent; /* Make canvas transparent */
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

#starfield {
    background-color: var(--primary-color);
    z-index: 0;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.hidden {
    opacity: 0;
    visibility: hidden;
}

.menu {
    text-align: center;
}

.menu h1 {
    font-size: 5rem;
    color: var(--accent-color);
    text-shadow: 0 0 15px var(--accent-color);
    margin-bottom: 1rem;
}

.menu h2 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

.menu-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    font-size: 1.5rem;
    background-color: transparent;
    color: var(--text-color);
    border: 2px solid var(--text-color);
    cursor: pointer;
    transition: all 0.2s ease;
    margin: 0.5rem;
}

.menu-button:hover {
    background-color: var(--accent-color);
    color: var(--primary-color);
    border-color: var(--accent-color);
    box-shadow: 0 0 15px var(--accent-color);
}

.menu-button .material-symbols-outlined {
    margin-right: 0.5rem;
}

#instructions {
    position: absolute;
    bottom: 10px;
    right: 10px;
    text-align: right;
    font-size: 14px;
    color: #aaa;
    z-index: 3;
}

/* Level Up Screen */
#level-up-screen h2 {
    font-size: 3rem;
    color: gold;
    text-shadow: 0 0 10px gold;
}

#upgrade-cards {
    display: flex;
    gap: 20px;
    margin-top: 2rem;
}

.upgrade-card {
    width: 220px;
    height: 250px;
    border: 2px solid var(--accent-color);
    background: rgba(10, 10, 10, 0.8);
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
}

.upgrade-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 0 20px var(--accent-color);
}

.upgrade-card .icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.upgrade-card .name {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.upgrade-card .description {
    font-size: 1rem;
    color: #ccc;
}

.upgrade-count {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background-color: var(--accent-color);
    color: var(--primary-color);
    border-radius: 50%;
    width: 28px;
    height: 28px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 16px;
    font-weight: bold;
    border: 2px solid var(--primary-color);
}

#pause-menu h2 {
    font-size: 3rem;
    margin-bottom: 2rem;
    text-shadow: 0 0 10px var(--text-color);
}

.settings-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 300px;
    margin-bottom: 1rem;
}

.settings-row label {
    font-size: 1.2rem;
}

.settings-row input[type="range"] {
    width: 180px;
}