@import url('https://fonts.googleapis.com/css2?family=VT323&display=swap');

:root {
    --black: #000;
    --white: #fff;
    --gray-dark: #111;
    --gray-mid: #444;
}

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

html, body { width: 100%; height: 100%; overflow: hidden; }

.game-body {
    background: var(--black);
    color: var(--white);
    font-family: 'VT323', monospace;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

.crt-overlay {
    position: fixed; inset: 0; z-index: 999; pointer-events: none;
}
.crt-lines {
    position: absolute; inset: 0;
    background: repeating-linear-gradient(0deg, rgba(0,0,0,0.04), rgba(0,0,0,0.04) 1px, transparent 1px, transparent 3px);
}
.crt-flicker {
    position: absolute; inset: 0;
    background: rgba(255,255,255,0.02);
    animation: flicker 0.12s infinite;
}
@keyframes flicker {
    0% { opacity: 0.85; } 50% { opacity: 1; } 100% { opacity: 0.9; }
}
.vhs-grain {
    position: absolute; inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.08'/%3E%3C/svg%3E");
    opacity: 0.1; animation: grain 0.25s steps(3) infinite;
}
@keyframes grain {
    0% { transform: translate(0,0); } 33% { transform: translate(-1px,2px); }
    66% { transform: translate(2px,-1px); } 100% { transform: translate(0,0); }
}
.vignette {
    position: absolute; inset: 0;
    background: radial-gradient(ellipse at center, transparent 40%, rgba(0,0,0,0.9) 100%);
}

.fullscreen-overlay {
    position: fixed; inset: 0;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
}
.fullscreen-overlay.hidden { display: none; }
.fullscreen-overlay.active { display: flex; }

.starfield-canvas {
    position: absolute; inset: 0;
    width: 100%; height: 100%; z-index: -1;
}

/* MENU */
#start-screen {
    background: var(--black);
    justify-content: space-between; padding: 0;
}
.retro-nav {
    width: 100%; padding: 16px 40px;
    display: flex; justify-content: space-between;
    align-items: center;
    border-bottom: 3px double var(--white);
    z-index: 10;
}
.back-link {
    color: var(--white); text-decoration: none;
    font-size: 1.6rem; letter-spacing: 2px;
    transition: all 0.15s;
}
.back-link:hover { background: var(--white); color: var(--black); }
.retro-badge {
    font-size: 1.2rem; letter-spacing: 3px; opacity: 0.5;
}

.menu-content {
    flex: 1; display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    gap: 18px; z-index: 10;
}
.title-block { text-align: center; line-height: 1; }
.title-sub {
    font-size: 1.1rem; letter-spacing: 6px;
    opacity: 0.7; margin-bottom: 6px;
}
.game-big-title {
    font-size: clamp(3.5rem, 10vw, 7rem);
    font-weight: 400; line-height: 0.9;
    text-shadow: 4px 4px 0 var(--gray-mid);
    letter-spacing: 6px;
}
.title-invert {
    display: inline-block;
    border: 4px double var(--white);
    padding: 0 16px;
    letter-spacing: 16px;
    margin-top: 8px;
    animation: glitchPulse 3s infinite;
    color: var(--black);
    background: var(--white);
}
@keyframes glitchPulse {
    0%, 100% { box-shadow: 0 0 8px var(--white), 0 0 20px rgba(255,255,255,0.2); }
    3% { opacity: 0.7; }
    5% { opacity: 1; }
    7% { opacity: 0.8; }
    9% { opacity: 1; }
    50% { box-shadow: 0 0 2px var(--white); }
}

.menu-instructions {
    text-align: left;
    border: 2px dashed var(--white);
    padding: 12px 28px;
    font-size: 1.3rem;
    line-height: 1.8;
    letter-spacing: 1px;
    opacity: 0.85;
}

.menu-legend {
    display: flex; gap: 12px; font-size: 1.3rem; flex-wrap: wrap; justify-content: center;
}
.ml-badge {
    border: 2px solid var(--white);
    padding: 3px 10px;
    letter-spacing: 1px;
    font-size: 1rem;
}
.ml-invert {
    background: var(--white);
    color: var(--black);
    border-style: double;
}

.hi-score-display {
    font-size: 2rem; letter-spacing: 6px; opacity: 0.7;
}

.pixel-btn {
    background: var(--white); color: var(--black);
    border: 4px solid var(--white);
    padding: 10px 32px; font-size: 2rem;
    font-family: 'VT323', monospace; letter-spacing: 4px;
    cursor: pointer; text-decoration: none;
    display: inline-block; transition: all 0.1s;
    text-align: center;
}
.pixel-btn:hover {
    background: var(--black); color: var(--white);
    border-color: var(--white);
    box-shadow: 0 0 20px rgba(255,255,255,0.4);
}
.pixel-btn-outline {
    background: var(--black); color: var(--white);
}
.pixel-btn-outline:hover {
    background: var(--white); color: var(--black);
    border-color: var(--white);
}
.blink-btn { animation: btnBlink 1.2s step-start infinite; }
@keyframes btnBlink {
    0%, 49% { opacity: 1; } 50%, 100% { opacity: 0.4; }
}
.flicker-text { animation: flicker 0.4s infinite; }

.retro-footer {
    width: 100%; border-top: 3px double var(--white);
    text-align: center; padding: 14px;
    font-size: 1rem; letter-spacing: 2px;
    opacity: 0.55; z-index: 10;
}
.footer-tape {
    display: block; font-size: 0.75rem;
    opacity: 0.3; margin-bottom: 4px;
}

/* GAME SCREEN */
#game-screen { background: var(--black); justify-content: flex-start; }

.hud {
    width: 100%; display: flex; justify-content: space-between;
    align-items: stretch; padding: 6px 16px;
    border-bottom: 3px double var(--black);
    background: var(--white); z-index: 10; flex-shrink: 0; gap: 8px;
}
.hud-block { display: flex; flex-direction: column; justify-content: center; }
.hud-center { align-items: center; flex: 1; gap: 2px; }
.hud-right { align-items: flex-end; gap: 2px; }
.hud-sub-row { display: flex; align-items: center; gap: 10px; }
.hud-label {
    font-size: 0.85rem; letter-spacing: 3px;
    color: var(--black); opacity: 0.5;
}
.hud-value {
    font-size: 1.8rem; letter-spacing: 3px;
    color: var(--black);
}
.hud-lives { font-size: 1.6rem; letter-spacing: 2px; }
.hud-title {
    font-size: 1.3rem; letter-spacing: 6px;
    color: var(--black); opacity: 0.45;
}
.hud-spacer { margin-left: 14px; }

.hud-collected {
    display: flex; gap: 6px; align-items: center;
}
.hud-collected span {
    font-size: 1.2rem; opacity: 0.35; transition: all 0.3s;
}
.hud-collected span.collected { opacity: 1; }

#gameCanvas {
    flex: 1; width: 100%; background: var(--black);
    image-rendering: pixelated; display: block;
}

.game-footer {
    width: 100%; display: flex; justify-content: space-between;
    padding: 8px 16px; border-top: 3px double var(--black);
    font-size: 1.1rem; letter-spacing: 3px;
    background: var(--white); flex-shrink: 0;
    color: var(--black);
}

/* GAME OVER */
#gameover-screen { background: var(--black); }
.gameover-content {
    z-index: 10; display: flex; flex-direction: column;
    align-items: center; gap: 20px;
    border: 4px double var(--white);
    padding: 36px 50px;
}
.go-pre { font-size: 1.3rem; letter-spacing: 6px; opacity: 0.6; }
.go-title {
    font-size: clamp(3rem, 9vw, 6rem); font-weight: 400;
    text-align: center; line-height: 0.9;
    text-shadow: 4px 4px 0 var(--gray-mid);
    letter-spacing: 8px;
}
.go-scores { width: 100%; display: flex; flex-direction: column; gap: 8px; }
.go-score-row {
    display: flex; justify-content: space-between;
    font-size: 1.6rem; border-bottom: 1px solid var(--white);
    padding-bottom: 4px; letter-spacing: 4px;
}
.go-buttons { display: flex; gap: 14px; }

.go-services-breakdown {
    width: 100%; display: flex; flex-wrap: wrap; gap: 6px; justify-content: center;
    margin-top: 4px;
}
.go-svc-badge {
    border: 2px solid var(--white); color: var(--white);
    padding: 2px 10px; font-size: 1rem; letter-spacing: 2px;
}

/* COLLECTED POPUP */
.collect-popup {
    position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
    font-size: 3rem; letter-spacing: 4px;
    color: var(--white); z-index: 100;
    pointer-events: none;
    animation: popUp 0.8s ease-out forwards;
}
@keyframes popUp {
    0% { opacity: 1; transform: translate(-50%, -50%) scale(1.5); }
    100% { opacity: 0; transform: translate(-50%, -80%) scale(1); }
}

@media (max-width: 768px) {
    .menu-instructions { font-size: 1rem; padding: 10px 18px; }
    .game-big-title { font-size: 3rem; letter-spacing: 3px; }
    .title-invert { letter-spacing: 8px; }
    .hud { padding: 4px 10px; }
    .hud-value { font-size: 1.4rem; }
    .hud-title { font-size: 1rem; letter-spacing: 4px; }
    .retro-nav { padding: 12px 20px; }
    .retro-nav .back-link { font-size: 1.2rem; }
    .retro-nav .retro-badge { font-size: 0.8rem; }
    .gameover-content { padding: 24px 30px; }
    .game-footer { font-size: 0.9rem; padding: 6px 10px; }
}