@font-face {
    font-family: 'PrintChar21';
    src: url('fonts_retro/pr/PrintChar21.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

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

:root {
    --cyan:        rgb(5, 160, 180);
    --cyan-dim:    rgb(3, 80, 90);
    --cyan-bright: rgb(100, 220, 240);
    --magenta:     rgb(220, 0, 180);
    --bg:          #000000;
}

html, body {
    width: 100%;
    height: 100%;
    background: #050505;
    overflow: hidden;
    perspective: 1000px;
}

#gameCanvas {
    display: block;
    width: 100vw;
    height: 100vh;
    cursor: none;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    transform: rotateX(1.5deg) scale(1.03);
    box-shadow: inset 0 0 100px rgba(0,0,0,1);
}

/* ── CRT OVERLAYS ───────────────────────────────────────── */
body::before {
    content: " ";
    display: block;
    position: absolute;
    top: 0; left: 0; bottom: 0; right: 0;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.2) 50%), 
                linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
    z-index: 100;
    background-size: 100% 3px, 3px 100%;
    pointer-events: none;
    opacity: 0.8;
}

body::after {
    content: " ";
    display: block;
    position: absolute;
    top: 0; left: 0; bottom: 0; right: 0;
    background: radial-gradient(circle, rgba(18, 16, 16, 0) 40%, rgba(0, 0, 0, 0.5) 100%);
    z-index: 101;
    pointer-events: none;
    animation: crt-flicker 0.15s infinite;
}

@keyframes crt-flicker {
    0% { opacity: 0.98; }
    50% { opacity: 1; }
    100% { opacity: 0.99; }
}

/* ── HUD overlay ───────────────────────────────────────── */
#hud {
    position: absolute;
    top: 25px;
    left: 0;
    right: 0;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 45px;
    pointer-events: none;
    font-family: 'PrintChar21', monospace;
    color: var(--cyan);
    font-size: 11px;
    letter-spacing: 1px;
    z-index: 10;
}

#hud-left,
#hud-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.hud-label {
    color: var(--cyan-dim);
    font-size: 9px;
    letter-spacing: 2px;
}

#score-display {
    font-size: 16px;
    color: var(--cyan-bright);
    text-shadow: 0 0 8px var(--cyan);
}

#hi-display {
    font-size: 14px;
    color: var(--cyan);
}

#wave-display {
    font-size: 14px;
    color: var(--cyan);
}

#cities-display {
    font-size: 12px;
    color: var(--cyan);
    letter-spacing: 4px;
    min-width: 90px;
}

/* ── Overlay screens ───────────────────────────────────── */
#overlay-screen,
#pause-screen {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
    font-family: 'PrintChar21', monospace;
    color: var(--cyan);
    pointer-events: none;
    z-index: 20;
}

#overlay-screen.hidden,
#pause-screen.hidden {
    display: none;
}

#overlay-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    width: 100%;
    color: var(--cyan-bright);
    text-shadow:
        0 0 20px var(--cyan),
        0 0 60px var(--cyan-dim),
        4px 0 0 var(--magenta);
}

#overlay-year {
    font-size: clamp(18px, 5vw, 56px);
    letter-spacing: 0.1em;
    line-height: 1;
}

#overlay-name {
    font-size: clamp(18px, 5vw, 56px);
    letter-spacing: 0.1em;
}

#overlay-sub {
    font-size: 14px;
    letter-spacing: 4px;
    color: var(--cyan);
    text-shadow: 0 0 8px var(--cyan);
}

#overlay-prompt {
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--cyan-dim);
    animation: blink 1.2s step-end infinite;
}

#pause-label {
    font-size: 48px;
    letter-spacing: 8px;
    color: var(--cyan-bright);
    text-shadow: 0 0 20px var(--cyan);
}

#pause-prompt {
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--cyan-dim);
    animation: blink 1.2s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0; }
}