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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #a78bfa 0%, #7c3aed 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
}

#game-container {
    width: 100%;
    max-width: 800px;
    background: white;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 600px;
}

#game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: linear-gradient(135deg, #8B5CF6, #6D28D9);
    color: white;
}

.game-title {
    font-size: 1.3rem;
    font-weight: 700;
}

.icon-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: 8px;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

#game-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.scene {
    flex: 1;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
    transition: background-image 0.3s;
}

.background-forest {
    background-color: #86EFAC;
    background-image: linear-gradient(#38bdf8 50%, #86efac 50%);
    /* Simple sky/grass */
}

.background-city {
    background-color: #94A3B8;
    background-image: linear-gradient(#38bdf8 60%, #94a3b8 60%);
    /* Sky/road */
}

.background-space {
    background-color: #1E1B4B;
    background-image: radial-gradient(white 1px, transparent 1px);
    background-size: 50px 50px;
}

.sticker-palette {
    height: 80px;
    background: #F3F4F6;
    border-top: 2px solid #E5E7EB;
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 0 20px;
    overflow-x: auto;
}

.sticker {
    font-size: 2.5rem;
    cursor: grab;
    user-select: none;
    transition: transform 0.2s;
    flex-shrink: 0;
}

.sticker:hover {
    transform: scale(1.2);
}

.placed-sticker {
    position: absolute;
    font-size: 3.5rem;
    cursor: grab;
    user-select: none;
    filter: drop-shadow(0 4px 4px rgba(0, 0, 0, 0.2));
    transition: transform 0.1s;
}

.placed-sticker:active {
    cursor: grabbing;
    transform: scale(1.1);
}