* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
}

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #020208;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: #e2e8f0;
}

#canvas-container {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

/* UI Overlay */
.interface-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 24px;
}

.interactive {
    pointer-events: auto;
}

header {
    background: rgba(10, 10, 25, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 16px 24px;
    border-radius: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 400px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.logo-area h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: #ffffff;
    text-transform: uppercase;
}

.logo-area span {
    color: #10b981; /* Forest Green Accent */
}

.control-panel {
    background: rgba(10, 10, 25, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 16px;
    border-radius: 12px;
    max-width: 320px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    margin-top: auto;
    max-height: 65vh;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.3) transparent;
}

.panel-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
    color: #94a3b8;
    font-weight: 600;
}

.legend-item {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    margin-right: 12px;
    box-shadow: inset 0 0 4px rgba(0,0,0,0.5);
}

.color-forest { background-color: #15803d; border: 1px solid #22c55e; }
.color-desert { background-color: #eab308; }
.color-tundra { background-color: #a1a1aa; }
.color-savanna { background-color: #84cc16; }

.instructions {
    font-size: 0.75rem;
    color: #64748b;
    margin-top: 16px;
    border-top: 1px solid rgba(255,255,255,0.05);
    padding-top: 12px;
    text-align: center;
}