body {
    background-color: #0f172a !important;
    color: #ffffff !important;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
}
.game-page-body {
    background-color: #0f172a !important;
}
.game-nav {
    padding: 1rem 2rem;
    background-color: #1e293b;
}
.btn-back {
    color: #38bdf8;
    text-decoration: none;
    font-weight: bold;
}
.btn-back:hover {
    text-decoration: underline;
}
.game-page-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
    padding: 2rem;
    text-align: center;
}
.game-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 1.5rem auto;
    background-color: #1e1e24;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}
#score-board {
    position: absolute;
    top: 15px;
    right: 20px;
    color: #38bdf8;
    font-family: monospace;
    font-size: 1.2rem;
    font-weight: bold;
    z-index: 10;
}
#gameCanvas {
    display: block;
    max-width: 100%;
    background-color: #0f1115;
}
#game-over-screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #f87171;
}
#retry-btn {
    background-color: #38bdf8;
    color: #0f172a;
    border: none;
    padding: 12px 24px;
    font-weight: bold;
    border-radius: 6px;
    cursor: pointer;
}
.controls-hint {
    color: #94a3b8;
    margin-top: 0.5rem;
}
.hidden { display: none !important; }