.parent {
    display: grid;
    
    /* 1. Lock both column widths */
    grid-template-columns: 800px 400px; 
    
    /* 2. Center the entire grid horizontally on the screen */
    justify-content: center;
    
    /* 3. Keep your existing gaps and alignment */
    gap: 20px;
    align-items: start;
    
    /* Optional: Add a top margin so it doesn't touch the header immediately */
    margin-top: 20px;
    margin-bottom: 50px;
}



:root {
    /* Intel System Palette */
    --bg-color: #05080f;
    --panel-bg: rgba(5, 8, 15, 0.95);
    --primary-cyan: #00f0ff;
    --dim-cyan: rgba(0, 240, 255, 0.2);
    --text-color: #cceeff;
    --text-muted: #6272a4;
    --border-color: #1e3a52;
    --danger: #ff5555;
    
    /* Fonts */
    --font-tech: 'Share Tech Mono', monospace;
    --font-ui: 'Rajdhani', sans-serif;

    /* Map Specific Variables (High Contrast for Dark Mode) */
    --orbit-color: #333;
    --star-color: #ffd700;
    --barren-color: #cd853f;
    --lava-color: #ff4500;
    --storm-color: #4169e1;
    --temperate-color: #32cd32;
    --oceanic-color: #00bfff;
    --gas-color: #d3d3d3;
    --ice-color: #e0ffff;
    --shattered-color: #ff1493;
    --moon-color: #666;
    --stargate-color: #00f0ff;
    --stargate-stroke-color: #fff;
}

body {
    font-family: var(--font-ui);
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    background: radial-gradient(circle at center, #0b101b 0%, #020305 100%);
    min-height: 100vh;
}

/* --- Decorative Header --- */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--dim-cyan);
    padding-bottom: 10px;
    margin-bottom: 20px;
}

instructions {
    font-size: 12px;
    --primary-cyan: #00f0ff;
    color: var(--primary-cyan);
    font-style: italic;
    margin-top: 5px;
    
}

.brand {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-cyan);
    letter-spacing: 2px;
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 20px;
    font-size: 14px;
    letter-spacing: 1px;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--primary-cyan);
}

/* --- Grid Layout --- */
.parent {
    display: grid;
    grid-template-columns: 802px 1fr; /* Fixed map width + flexible sidebar */
    gap: 20px;
    align-items: start;
}

/* --- Map Area --- */
.map-box {
    display: flex;
    flex-direction: column;
}

h1#system-header {
    font-size: 20px;
    color: var(--primary-cyan);
    margin: 0 0 10px 0;
    padding-left: 10px;
    border-left: 3px solid var(--primary-cyan);
    text-transform: uppercase;
    letter-spacing: 2px;
}

#map-container {
    width: 800px;
    height: 800px;
    border: 1px solid var(--dim-cyan);
    background-color: rgba(0,0,0,0.5);
    background-image: 
        linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    position: relative;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

#system-diameter-display {
    background-color: var(--bg-color);
    color: var(--text-muted);
    font-family: var(--font-tech);
    padding: 5px;
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    text-align: right;
}

/* --- Sidebar Controls --- */
.map-controls {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width:800px
}

.hud-panel {
    background-color: var(--panel-bg);
    border: 1px dashed var(--text-muted);
    padding: 15px;
    position: relative;
}

.hud-panel h2, .hud-panel h3, .hud-panel h4 {
    color: var(--primary-cyan);
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 16px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 5px;
    text-transform: uppercase;
    font-weight: 700;
}

/* Inputs & Buttons */
input[type="text"], 
input[type="number"],
select {
    background-color: rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
    border-left: 2px solid var(--primary-cyan);
    color: #fff;
    padding: 8px;
    font-family: var(--font-tech);
    font-size: 14px;
    outline: none;
    width: 100%;
    box-sizing: border-box;
}

.input-group-row {
    display: flex;
    gap: 5px;
    margin-bottom: 10px;
    align-items: center;
}

.unit {
    font-family: var(--font-tech);
    color: var(--text-muted);
    font-size: 12px;
}

button.hud-btn {
    background-color: transparent;
    border: 1px solid var(--dim-cyan);
    color: var(--primary-cyan);
    font-family: var(--font-tech);
    padding: 8px 12px;
    cursor: pointer;
    text-transform: uppercase;
    transition: all 0.2s;
    font-size: 13px;
    letter-spacing: 0.5px;
}

button.hud-btn:hover:not(:disabled) {
    background-color: var(--dim-cyan);
    box-shadow: 0 0 10px var(--dim-cyan);
}

button.hud-btn:disabled {
    border-color: #333;
    color: #555;
    cursor: not-allowed;
}

button.hud-btn.small {
    padding: 5px 8px;
    font-size: 11px;
}

button.hud-btn.secondary {
    border-color: var(--text-muted);
    color: var(--text-muted);
}

button.hud-btn.danger {
    border-color: var(--danger);
    color: var(--danger);
}
button.hud-btn.danger:hover {
    background-color: rgba(255,85,85,0.2);
}

button.full-width {
    width: 100%;
    margin-bottom: 10px;
}

.control-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

/* --- Legend Table --- */
table#legend-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-tech);
    font-size: 13px;
}

#legend-table td {
    border-bottom: 1px solid var(--border-color);
    padding: 8px 0;
}

#legend-table td:first-child {
    color: var(--text-muted);
    width: 40%;
}

#legend-table td:last-child {
    color: var(--primary-cyan);
    text-align: right;
}

.blink {
    animation: blinker 2s linear infinite;
    color: var(--danger) !important;
}
@keyframes blinker { 50% { opacity: 0.5; } }

/* --- Info Panel --- */
#info-panel {
    min-height: 80px;
    padding: 10px;
    background-color: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    margin-bottom: 15px;
    font-family: var(--font-tech);
    color: var(--text-color);
}
.info-placeholder {
    color: var(--text-muted);
    font-style: italic;
}

/* --- Custom Marker Area --- */
#customMarkerControls {
    background-color: rgba(0,0,0,0.5);
    border: 1px solid var(--border-color);
    padding: 10px;
    margin-top: 10px;
    display: none;
}

.marker-input-row {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}

.marker-input-row label {
    width: 60px;
    font-size: 12px;
    color: var(--text-muted);
}

#customMarkerInstructions {
    font-size: 10px;
    color: var(--text-muted);
    text-align: center;
    margin: 10px 0;
}

/* --- Map/SVG Elements --- */
.user-marker { cursor: grab; }
.user-marker:active { cursor: grabbing; }
.user-marker:hover use { filter: drop-shadow(0 0 5px var(--primary-cyan)); }

/* Labels */
.celestial-label {
    font-family: var(--font-tech);
    font-size: 10px;
    fill: var(--text-muted);
    pointer-events: none;
}
#system-map[viewBox*=" 800 800"] .celestial-label { display: none; }

/* SVG Styles */
.orbit { stroke: var(--orbit-color); stroke-width: 1; fill: none; stroke-dasharray: 2,4; }
.Star { fill: var(--star-color); }
.Barren { fill: var(--barren-color); }
.Lava { fill: var(--lava-color); }
.Storm { fill: var(--storm-color); }
.Temperate { fill: var(--temperate-color); }
.Oceanic { fill: var(--oceanic-color); }
.Gas { fill: var(--gas-color); }
.Ice { fill: var(--ice-color); }
.Shattered { fill: var(--shattered-color); }
.Moon { fill: var(--moon-color); }

/* Autocomplete Dropdown */
#autocomplete-results {
    background: var(--bg-color);
    border: 1px solid var(--primary-cyan);
    position: absolute;
    z-index: 100;
    max-height: 200px;
    overflow-y: auto;
    width: calc(100% - 32px); /* adjust for padding */
}
#autocomplete-results div {
    padding: 5px;
    cursor: pointer;
    font-family: var(--font-tech);
}
#autocomplete-results div:hover {
    background-color: var(--dim-cyan);
}


/* -- Styling for latest Kills -- */
/* The group stays put */
.battle-marker {
    cursor: help;
    /* Forces the scale to happen from the center of the icon's paths */
    transform-box: fill-box;
    transform-origin: center;
    transition: transform 0.15s ease-out;
}

/* We target the 'use' element specifically for the scale 
   so the invisible hitbox (the group) stays the same size */
.battle-marker:hover use {
    transform: scale(1.8);
    filter: drop-shadow(0 0 5px #ff0000);
}

/* Ensure the title (tooltip) doesn't interfere with mouse events */
.battle-marker title {
    pointer-events: none;
}

.battle-marker use {
    opacity: 0.9;
}