:root {
    --neon-blue: #00d2ff;
    --neon-green: #39ff14;
    --neon-red: #ff3131;
    --glass: rgba(0, 20, 40, 0.6);
}

* {
    margin: 0; padding: 0; box-sizing: border-box;
    font-family: 'Share Tech Mono', monospace;
    user-select: none;
}

body {
    background: #000;
    overflow: hidden;
    color: white;
}

#game-wrapper {
    position: relative;
    width: 100vw; height: 100vh;
}

/* World & Movement */
#world {
    position: absolute;
    width: 200vw; height: 200vh;
    left: -50vw; top: -50vh;
    transition: transform 0.1s ease-out;
}

#bg-img {
    width: 100%; height: 100%;
    object-fit: cover;
    filter: brightness(0.7) contrast(1.2);
}

#enemy-container {
    position: absolute;
    width: 80px; height: 120px;
    left: 120vw; top: 80vh; /* Random-ish start */
    transition: width 0.3s, height 0.3s;
}

#enemy-img {
    width: 100%; height: 100%;
    object-fit: contain;
}

#enemy-hp-bar {
    width: 100%; height: 4px;
    background: var(--neon-red);
    margin-top: 5px;
    box-shadow: 0 0 10px var(--neon-red);
    transition: width 0.2s;
}

/* SCOPE SYSTEM */
#scope-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: 50;
    pointer-events: none;
}

.scope-lens {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 80vh; height: 80vh;
    border-radius: 50%;
    border: 15vw solid black;
    box-sizing: content-box;
    box-shadow: 0 0 0 100vw black;
    overflow: hidden;
}

.vignette {
    position: absolute;
    top:0; left:0; width:100%; height:100%;
    background: radial-gradient(circle, transparent 40%, rgba(0,0,0,0.8) 100%);
}

.crosshair {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 100%; height: 100%;
}

.v-line {
    position: absolute; left: 50%; top: 0; width: 2px; height: 100%;
    background: rgba(255, 255, 255, 0.4);
}

.h-line {
    position: absolute; left: 0; top: 50%; width: 100%; height: 2px;
    background: rgba(255, 255, 255, 0.4);
}

.scope-hud {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 60vh; height: 40vh;
    display: flex; justify-content: space-between; align-items: flex-end;
    padding: 20px;
    font-size: 1.2rem;
    color: var(--neon-blue);
    text-shadow: 0 0 10px var(--neon-blue);
}

/* MAIN HUD */
#hud {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    padding: 30px;
    display: flex; flex-direction: column; justify-content: space-between;
    pointer-events: none;
    z-index: 10;
}

.player-hp { width: 300px; }
.label { font-size: 0.9rem; margin-bottom: 5px; color: var(--neon-blue); }
.bar-outer { width: 100%; height: 10px; background: rgba(0,0,0,0.5); border: 1px solid var(--neon-blue); }
.bar-fill { height: 100%; background: var(--neon-blue); width: 100%; box-shadow: 0 0 15px var(--neon-blue); transition: width 0.3s; }

.mission-timer {
    font-size: 2rem; color: var(--neon-blue);
}

.instruction {
    text-align: center;
    background: var(--glass);
    padding: 10px 40px;
    border-radius: 5px;
    border: 1px solid rgba(0, 210, 255, 0.3);
}

/* FEEDBACK */
#flash {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: white; opacity: 0.8; z-index: 60;
}

#hit-marker {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    width: 30px; height: 30px;
    border: 2px solid var(--neon-red);
    z-index: 55;
}

/* SCREENS */
.overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.8);
    display: flex; justify-content: center; align-items: center;
    z-index: 100;
}

.glass-box {
    background: var(--glass);
    backdrop-filter: blur(20px);
    padding: 60px;
    border-radius: 5px;
    border: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}

h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 3.5rem; color: var(--neon-blue);
    margin-bottom: 10px;
}

button {
    margin-top: 40px;
    padding: 15px 60px;
    background: var(--neon-blue);
    color: black;
    border: none;
    font-size: 1.2rem; font-weight: 900;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    box-shadow: 0 0 30px var(--neon-blue);
    transform: scale(1.05);
}

.hidden { display: none !important; }