:root {
    --bg-dark: #020617;
    --text-primary: #f8fafc;
    --accent-blue: #0ea5e9;
    --accent-red: #f43f5e;
    --accent-amber: #eab308;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
}

.fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
}

game-title-screen {
    display: block;
    z-index: 100;
}

#game-canvas-container {
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* UI Overlays */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 200;
    background: radial-gradient(circle at 50% 50%, rgba(30, 41, 59, 0.4) 0%, rgba(2, 6, 23, 0.9) 100%);
    backdrop-blur: 5px;
}

.hidden {
    display: none !important;
}

/* Retro Title Text */
.title-text {
    font-size: 6rem;
    font-weight: 900;
    letter-spacing: -0.05em;
    line-height: 0.8;
    text-transform: uppercase;
    text-shadow: 0 10px 0 rgba(14, 165, 233, 0.3);
    margin-bottom: 2rem;
    text-align: center;
}

.btn {
    appearance: none;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-weight: 900;
    text-transform: uppercase;
    padding: 1.25rem 2.5rem;
    border-radius: 1rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.1em;
}

.btn-primary {
    background-color: var(--accent-blue);
    color: white;
    box-shadow: 0 6px 0 #0369a1;
}

.btn-primary:active {
    transform: translateY(4px);
    box-shadow: 0 2px 0 #0369a1;
}

.btn-secondary {
    background-color: #1e293b;
    color: #94a3b8;
    border: 1px solid rgba(255,255,255,0.05);
}

/* HUD Styling */
#hud {
    position: absolute;
    top: 2rem;
    left: 2rem;
    right: 2rem;
    display: flex;
    justify-content: space-between;
    pointer-events: none;
    z-index: 1000;
}

.hud-panel {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-blur: 10px;
    padding: 0.75rem 1.25rem;
    border-radius: 1rem;
    display: flex;
    flex-direction: row;
    align-items: baseline;
    gap: 1rem;
}

.hud-label {
    font-size: 0.6rem;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--accent-blue);
    letter-spacing: 0.1em;
}

.hud-value {
    font-size: 1.5rem;
    font-weight: 900;
}