:root {
    --bg: #1a1a2e;
    --text: #eee;
    --accent: #00ff88;
    --danger: #ff4444;
    --ui-bg: rgba(0, 0, 0, 0.7);
    --border: #00ff88;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Courier New', monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

#game-container {
    position: relative;
    width: 800px;
    height: 600px;
}

#game-canvas {
    display: block;
    background: #0f0f1e;
    border: 4px solid var(--border);
}

#ui-overlay {
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    pointer-events: none;
}

#health-bar-container,
#xp-bar-container {
    position: relative;
    width: 250px;
    height: 30px;
    background: var(--ui-bg);
    border: 3px solid var(--border);
    margin-bottom: 10px;
    overflow: hidden;
}

#health-bar {
    height: 100%;
    background: var(--danger);
    transition: width 0.3s;
}

#xp-bar {
    height: 100%;
    background: var(--accent);
    transition: width 0.3s;
}

#health-text,
#xp-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: bold;
    font-size: 14px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

#stats {
    display: flex;
    gap: 20px;
    font-size: 16px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

#upgrade-menu {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--ui-bg);
    border: 4px solid var(--border);
    padding: 30px;
    min-width: 400px;
    pointer-events: all;
}

#upgrade-menu h2 {
    color: var(--accent);
    margin-bottom: 20px;
    text-align: center;
}

#upgrade-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.upgrade-btn {
    background: rgba(0, 255, 136, 0.2);
    border: 3px solid var(--accent);
    color: var(--text);
    padding: 15px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.upgrade-btn:hover {
    background: rgba(0, 255, 136, 0.4);
    transform: translateX(5px);
}

.upgrade-btn strong {
    color: var(--accent);
    display: block;
    margin-bottom: 5px;
}

#game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--ui-bg);
    border: 4px solid var(--danger);
    padding: 40px;
    text-align: center;
    pointer-events: all;
}

#game-over h2 {
    color: var(--danger);
    font-size: 32px;
    margin-bottom: 20px;
}

#final-stats {
    font-size: 16px;
    margin-bottom: 20px;
    line-height: 1.6;
}

#restart-btn {
    background: var(--accent);
    border: 3px solid var(--border);
    color: var(--bg);
    padding: 15px 40px;
    font-family: 'Courier New', monospace;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
}

#restart-btn:hover {
    background: #00cc6a;
    transform: scale(1.05);
}

#weapon-pickup {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--ui-bg);
    border: 3px solid var(--accent);
    padding: 15px 25px;
    text-align: center;
    pointer-events: none;
    animation: bounce 0.5s infinite;
}

#weapon-pickup p {
    margin: 5px 0 0 0;
    font-size: 14px;
    color: var(--accent);
}

#weapon-info {
    font-weight: bold;
    font-size: 16px;
    margin-bottom: 5px;
}

.rarity-common { color: #aaa; }
.rarity-uncommon { color: #5f5; }
.rarity-rare { color: #55f; }
.rarity-epic { color: #a5f; }
.rarity-legendary { color: #ff5; }

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-5px); }
}

.hidden {
    display: none !important;
}