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

body {
    background: #000;
    overflow: hidden;
    font-family: 'Courier New', monospace;
    color: #fff;
    cursor: none;
}

#game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

#game-canvas {
    display: block;
    image-rendering: pixelated;
    width: 100vw;
    height: 100vh;
}

/* Title Screen */
#title-screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(0, 0, 0, 0.85);
    z-index: 10;
}

#title-screen h1 {
    font-size: 8rem;
    color: #c00;
    text-shadow: 0 0 30px #f00, 0 0 60px #900;
    letter-spacing: 0.3em;
    animation: flicker 3s infinite alternate;
}

#title-screen h2 {
    font-size: 3rem;
    color: #888;
    letter-spacing: 0.5em;
    margin-top: -1rem;
}

.subtitle {
    color: #666;
    margin-top: 1rem;
    font-size: 1.1rem;
}

@keyframes flicker {
    0%, 90%, 100% { opacity: 1; }
    92% { opacity: 0.8; }
    94% { opacity: 1; }
    96% { opacity: 0.7; }
    98% { opacity: 1; }
}

.menu {
    margin-top: 3rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.menu-btn {
    font-family: 'Courier New', monospace;
    font-size: 1.5rem;
    padding: 0.8rem 3rem;
    background: transparent;
    color: #c00;
    border: 2px solid #c00;
    cursor: pointer;
    letter-spacing: 0.2em;
    transition: all 0.2s;
}

.menu-btn:hover {
    background: #c00;
    color: #fff;
    box-shadow: 0 0 20px rgba(200, 0, 0, 0.5);
}

#controls-info {
    margin-top: 2rem;
    text-align: left;
    line-height: 2;
    color: #aaa;
}

/* HUD */
#hud {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding: 1rem 2rem;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    z-index: 5;
    pointer-events: none;
}

#hud-left, #hud-right {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

#hud-center {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    pointer-events: none;
}

#crosshair {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.6);
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.3);
    z-index: 6;
}

#weapon-display {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 300px;
    z-index: 5;
}

#damage-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, transparent 40%, rgba(255, 0, 0, 0.4));
    pointer-events: none;
    z-index: 4;
    animation: damage-fade 0.3s forwards;
}

@keyframes damage-fade {
    from { opacity: 1; }
    to { opacity: 0; }
}

.hud-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hud-label {
    font-size: 0.8rem;
    color: #888;
    width: 60px;
}

.hud-bar {
    width: 120px;
    height: 12px;
    background: #333;
    border: 1px solid #555;
}

.bar-fill {
    height: 100%;
    transition: width 0.3s;
}

.health-fill {
    background: linear-gradient(to right, #c00, #f00);
    width: 100%;
}

.armor-fill {
    background: linear-gradient(to right, #00a, #00f);
    width: 0%;
}

.hud-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: #fff;
    min-width: 40px;
    text-align: right;
}

.ammo-text {
    color: #ff0;
}

.weapon-text {
    color: #0f0;
    font-size: 1rem;
}

/* Minimap */
#minimap-container {
    position: absolute;
    top: 1rem;
    right: 1rem;
    border: 2px solid #444;
    background: rgba(0, 0, 0, 0.7);
    z-index: 5;
}

#minimap-canvas {
    display: block;
}

/* Messages */
#message-display {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.5rem;
    color: #ff0;
    text-shadow: 0 0 10px rgba(255, 255, 0, 0.5);
    z-index: 6;
    transition: opacity 0.5s;
}

/* Level Complete / Game Over */
#level-complete, #game-over, #game-won {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(0, 0, 0, 0.85);
    z-index: 10;
}

#level-complete h2, #game-won h2 {
    font-size: 4rem;
    color: #0f0;
    text-shadow: 0 0 20px rgba(0, 255, 0, 0.5);
}

#game-over h2 {
    font-size: 5rem;
    color: #c00;
    text-shadow: 0 0 30px #f00;
}

#level-complete p, #game-over p, #game-won p {
    margin-top: 1rem;
    color: #aaa;
    font-size: 1.2rem;
}

.hidden {
    display: none !important;
}