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

:root {
    --bg: #050a06;
    --bg-panel: rgba(8, 16, 10, 0.65);
    --border: rgba(0, 255, 65, 0.22);
    --border-cyan: rgba(34, 211, 238, 0.25);
    --accent: #00ff41;
    --accent-cyan: #22d3ee;
    --accent-dim: rgba(0, 255, 65, 0.28);
    --accent-cyan-dim: rgba(34, 211, 238, 0.3);
    --danger: #ff3366;
    --danger-glow: rgba(255, 51, 102, 0.45);
    --warning: #ffb000;
    --shield: #00ff41;
    --money: #ffb000;
    --money-glow: rgba(255, 176, 0, 0.35);
    --text: #e8f5e9;
    --text-dim: #8ca68c;
    --font-ui: 'VT323', monospace;
    --font-mono: 'VT323', monospace;
    --font-term: 'VT323', monospace;
    --radius: 2px;
    --transition: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--bg);
    font-family: var(--font-ui);
    color: var(--text);
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
}

/* ===== CRT & Scanline Overlays ===== */
.scanlines {
    position: fixed;
    inset: 0;
    z-index: 999;
    pointer-events: none;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.08) 0px,
        rgba(0, 0, 0, 0.08) 1px,
        transparent 1px,
        transparent 3px
    );
    mix-blend-mode: multiply;
}

.crt-overlay {
    position: fixed;
    inset: 0;
    z-index: 998;
    pointer-events: none;
    background: radial-gradient(ellipse at center, rgba(0, 255, 65, 0.03) 0%, rgba(0, 0, 0, 0.25) 80%, rgba(0, 0, 0, 0.55) 100%);
    box-shadow: inset 0 0 120px rgba(0, 0, 0, 0.55);
    /* Barrel distortion vignette */
    background-image:
        radial-gradient(ellipse at center, transparent 55%, rgba(0,0,0,0.35) 100%),
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 100% 100%, 4px 4px, 4px 4px;
    background-blend-mode: multiply, normal, normal;
}

/* Phosphor chromatic aberration ghosting */
.crt-overlay::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(0,255,65,0.015) 0%, transparent 70%);
    mix-blend-mode: screen;
    opacity: 0.6;
    animation: crtGhost 4s ease-in-out infinite alternate;
}

@keyframes crtGhost {
    0%   { transform: translate(0, 0) scale(1); opacity: 0.5; }
    33%  { transform: translate(1px, 0) scale(1.002); opacity: 0.6; }
    66%  { transform: translate(-1px, 0.5px) scale(0.998); opacity: 0.55; }
    100% { transform: translate(0, -0.5px) scale(1); opacity: 0.5; }
}

/* Screen curvature mask */
.crt-overlay::after {
    content: '';
    position: absolute;
    inset: -20px;
    border-radius: 50% / 12%;
    box-shadow: inset 0 0 80px rgba(0,0,0,0.6), inset 0 0 40px rgba(0,0,0,0.3);
    pointer-events: none;
}

.ascii-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    font-family: var(--font-term);
    font-size: 14px;
    line-height: 1;
    color: rgba(0, 255, 65, 0.035);
    white-space: pre;
    overflow: hidden;
    user-select: none;
}

/* Subtle screen flicker */
@keyframes flicker {
    0%   { opacity: 0.97; }
    5%   { opacity: 0.95; }
    10%  { opacity: 0.97; }
    15%  { opacity: 0.94; }
    20%  { opacity: 0.97; }
    50%  { opacity: 0.96; }
    52%  { opacity: 0.99; }
    55%  { opacity: 0.96; }
    80%  { opacity: 0.98; }
    90%  { opacity: 0.95; }
    100% { opacity: 0.97; }
}

#game-canvas {
    animation: flicker 0.15s infinite;
}

#game-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* ===== Screens ===== */
.screen {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.screen-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(5, 10, 6, 0.88) 0%, rgba(5, 10, 6, 0.98) 70%);
    backdrop-filter: blur(4px);
    z-index: 0;
}

.screen-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 520px;
    padding: 2rem;
    animation: fadeUp 0.8s ease-out;
}

.screen-content::before {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 65, 0.12), transparent);
    animation: scanline 5s linear infinite;
    pointer-events: none;
    z-index: 2;
}

@keyframes scanline {
    0% { top: 0%; opacity: 0; }
    5% { opacity: 1; }
    95% { opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

.logo-ring {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-ring::before {
    content: '';
    position: absolute;
    inset: 0;
    border: 2px solid var(--accent);
    border-radius: 50%;
    opacity: 0.35;
    animation: ringPulse 3s ease-in-out infinite;
    box-shadow: 0 0 20px var(--accent-dim);
}

.logo-ring::after {
    content: '';
    position: absolute;
    inset: 12px;
    border: 1px dashed var(--accent-cyan);
    border-radius: 50%;
    opacity: 0.35;
    animation: ringSpin 12s linear infinite;
    box-shadow: 0 0 10px var(--accent-cyan-dim);
}

@keyframes ringPulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.08); opacity: 0.15; }
}

@keyframes ringSpin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

.logo-center {
    width: 64px;
    height: 64px;
    color: var(--accent);
    z-index: 1;
    filter: drop-shadow(0 0 20px var(--accent-dim));
}

.logo-center svg {
    width: 100%;
    height: 100%;
}

.screen-title {
    font-family: var(--font-term);
    font-size: 3.2rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    margin-bottom: 0.25rem;
    text-shadow: 0 0 30px var(--accent-dim), 0 0 60px rgba(0, 255, 65, 0.1);
    color: var(--accent);
    position: relative;
    display: inline-block;
}

/* Glitch effect on titles */
@keyframes glitch {
    0%   { transform: translate(0); clip-path: inset(0 0 0 0); }
    20%  { transform: translate(-2px, 1px); clip-path: inset(20% 0 60% 0); }
    40%  { transform: translate(2px, -1px); clip-path: inset(50% 0 10% 0); }
    60%  { transform: translate(-1px, 2px); clip-path: inset(10% 0 40% 0); }
    80%  { transform: translate(1px, -2px); clip-path: inset(70% 0 5% 0); }
    100% { transform: translate(0); clip-path: inset(0 0 0 0); }
}

.screen-title::before,
.screen-title::after {
    content: attr(data-text);
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    opacity: 0.8;
}

.screen-title::before {
    color: #ff3366;
    animation: glitch 3s infinite linear alternate-reverse;
    clip-path: inset(0 0 0 0);
    z-index: -1;
}

.screen-title::after {
    color: #22d3ee;
    animation: glitch 2s infinite linear alternate-reverse;
    clip-path: inset(0 0 0 0);
    z-index: -2;
}

.screen-title.alert {
    color: var(--danger);
    text-shadow: 0 0 30px var(--danger-glow), 0 0 60px rgba(255, 51, 102, 0.1);
}

.screen-title.alert::before { color: #ff0000; }
.screen-title.alert::after  { color: #ffb000; }

.shop-title {
    color: var(--money);
    text-shadow: 0 0 30px var(--money-glow), 0 0 60px rgba(255, 176, 0, 0.1);
}

.shop-title::before { color: #ff3366; }
.shop-title::after  { color: #22d3ee; }

.screen-subtitle {
    font-size: 1rem;
    color: var(--text-dim);
    letter-spacing: 0.1em;
    margin-bottom: 2rem;
}

.screen-instructions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
    align-items: center;
}

.inst-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-dim);
}

.inst-icon {
    font-size: 1.25rem;
    width: 28px;
    text-align: center;
    filter: grayscale(0.3);
}

.btn-row {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Perimeter Lock Button System ===== */
.btn-deploy { --lock-color: var(--accent); --lock-dim: var(--accent-dim); }
.btn-secondary { --lock-color: var(--money); --lock-dim: var(--money-glow); }
.btn-danger { --lock-color: var(--danger); --lock-dim: var(--danger-glow); }

.btn-deploy,
.btn-secondary,
.btn-danger {
    position: relative;
    overflow: hidden;
    font-family: var(--font-term);
    font-size: 1.25rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    padding: 0.75rem 2.5rem;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    min-width: 180px;
    text-align: center;
}

/* Corner brackets */
.btn-deploy::before,
.btn-secondary::before,
.btn-danger::before {
    content: '';
    position: absolute;
    top: 4px; left: 4px;
    width: 0; height: 0;
    border-top: 1px solid var(--lock-color);
    border-left: 1px solid var(--lock-color);
    opacity: 0;
    transition: width 0.25s ease, height 0.25s ease, opacity 0.2s ease, top 0.3s ease, left 0.3s ease;
    pointer-events: none;
}

.btn-deploy::after,
.btn-secondary::after,
.btn-danger::after {
    content: '';
    position: absolute;
    bottom: 4px; right: 4px;
    width: 0; height: 0;
    border-bottom: 1px solid var(--lock-color);
    border-right: 1px solid var(--lock-color);
    opacity: 0;
    transition: width 0.25s ease 0.1s, height 0.25s ease 0.1s, opacity 0.2s ease 0.1s, bottom 0.3s ease, right 0.3s ease;
    pointer-events: none;
}

.btn-deploy .lock-extra::before,
.btn-secondary .lock-extra::before,
.btn-danger .lock-extra::before {
    content: '';
    position: absolute;
    top: 4px; right: 4px;
    width: 0; height: 0;
    border-top: 1px solid var(--lock-color);
    border-right: 1px solid var(--lock-color);
    opacity: 0;
    transition: width 0.25s ease 0.05s, height 0.25s ease 0.05s, opacity 0.2s ease 0.05s, top 0.3s ease, right 0.3s ease;
    pointer-events: none;
}

.btn-deploy .lock-extra::after,
.btn-secondary .lock-extra::after,
.btn-danger .lock-extra::after {
    content: '';
    position: absolute;
    bottom: 4px; left: 4px;
    width: 0; height: 0;
    border-bottom: 1px solid var(--lock-color);
    border-left: 1px solid var(--lock-color);
    opacity: 0;
    transition: width 0.25s ease 0.15s, height 0.25s ease 0.15s, opacity 0.2s ease 0.15s, bottom 0.3s ease, left 0.3s ease;
    pointer-events: none;
}

.btn-deploy .lock-dot,
.btn-secondary .lock-dot,
.btn-danger .lock-dot {
    position: absolute;
    top: 50%; left: 50%;
    width: 3px; height: 3px;
    background: var(--lock-color);
    border-radius: 50%;
    opacity: 0;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
    pointer-events: none;
    box-shadow: 0 0 6px var(--lock-color);
}

.btn-deploy .lock-breath,
.btn-secondary .lock-breath,
.btn-danger .lock-breath {
    position: absolute;
    inset: 0;
    background: var(--lock-color);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.btn-deploy .lock-burst,
.btn-secondary .lock-burst,
.btn-danger .lock-burst {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, var(--lock-color), transparent 55%);
    opacity: 0;
    transform: scale(0.4);
    transition: opacity 0.12s ease, transform 0.12s ease;
    pointer-events: none;
}

/* Hover states */
.btn-deploy:hover,
.btn-secondary:hover,
.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px var(--lock-dim);
}

.btn-deploy:hover::before,
.btn-secondary:hover::before,
.btn-danger:hover::before {
    width: 12px; height: 12px; opacity: 0.9;
}

.btn-deploy:hover::after,
.btn-secondary:hover::after,
.btn-danger:hover::after {
    width: 12px; height: 12px; opacity: 0.9;
}

.btn-deploy:hover .lock-extra::before,
.btn-secondary:hover .lock-extra::before,
.btn-danger:hover .lock-extra::before {
    width: 12px; height: 12px; opacity: 0.9;
}

.btn-deploy:hover .lock-extra::after,
.btn-secondary:hover .lock-extra::after,
.btn-danger:hover .lock-extra::after {
    width: 12px; height: 12px; opacity: 0.9;
}

.btn-deploy:hover .lock-dot,
.btn-secondary:hover .lock-dot,
.btn-danger:hover .lock-dot {
    opacity: 1;
    animation: lockPulse 1s ease-in-out infinite;
}

.btn-deploy:hover .lock-breath,
.btn-secondary:hover .lock-breath,
.btn-danger:hover .lock-breath {
    opacity: 1;
    animation: lockBreath 2.4s ease-in-out infinite alternate;
}

/* Active states */
.btn-deploy:active,
.btn-secondary:active,
.btn-danger:active {
    transform: translateY(0) scale(0.97);
    transition-duration: 0.05s;
}

.btn-deploy:active .lock-burst,
.btn-secondary:active .lock-burst,
.btn-danger:active .lock-burst {
    opacity: 1;
    transform: scale(1);
}

/* Holding states */
.btn-deploy.holding,
.btn-secondary.holding,
.btn-danger.holding {
    border-color: var(--lock-color);
    box-shadow: 0 0 35px var(--lock-dim), inset 0 0 25px var(--lock-dim);
    text-shadow: 0 0 14px var(--lock-dim);
    transform: translateY(0) scale(0.98);
    transition-duration: 0.35s;
}

.btn-deploy.holding::before,
.btn-secondary.holding::before,
.btn-danger.holding::before {
    width: 50%; height: 50%;
    top: 2px; left: 2px;
    opacity: 1;
}

.btn-deploy.holding::after,
.btn-secondary.holding::after,
.btn-danger.holding::after {
    width: 50%; height: 50%;
    bottom: 2px; right: 2px;
    opacity: 1;
}

.btn-deploy.holding .lock-extra::before,
.btn-secondary.holding .lock-extra::before,
.btn-danger.holding .lock-extra::before {
    width: 50%; height: 50%;
    top: 2px; right: 2px;
    opacity: 1;
}

.btn-deploy.holding .lock-extra::after,
.btn-secondary.holding .lock-extra::after,
.btn-danger.holding .lock-extra::after {
    width: 50%; height: 50%;
    bottom: 2px; left: 2px;
    opacity: 1;
}

.btn-deploy.holding .lock-burst,
.btn-secondary.holding .lock-burst,
.btn-danger.holding .lock-burst {
    opacity: 0.5;
    transform: scale(0.85);
    transition-duration: 0.4s;
}

/* Released states */
.btn-deploy.released .lock-burst,
.btn-secondary.released .lock-burst,
.btn-danger.released .lock-burst {
    opacity: 1;
    transform: scale(1.2);
    transition: opacity 0.15s ease, transform 0.15s ease;
}

.btn-deploy.released::before,
.btn-secondary.released::before,
.btn-danger.released::before,
.btn-deploy.released::after,
.btn-secondary.released::after,
.btn-danger.released::after,
.btn-deploy.released .lock-extra::before,
.btn-secondary.released .lock-extra::before,
.btn-danger.released .lock-extra::before,
.btn-deploy.released .lock-extra::after,
.btn-secondary.released .lock-extra::after,
.btn-danger.released .lock-extra::after {
    width: 12px; height: 12px;
    opacity: 0.9;
    border-width: 1px;
}

.btn-deploy.released::before,
.btn-secondary.released::before,
.btn-danger.released::before { top: 4px; left: 4px; }

.btn-deploy.released::after,
.btn-secondary.released::after,
.btn-danger.released::after { bottom: 4px; right: 4px; }

.btn-deploy.released .lock-extra::before,
.btn-secondary.released .lock-extra::before,
.btn-danger.released .lock-extra::before { top: 4px; right: 4px; }

.btn-deploy.released .lock-extra::after,
.btn-secondary.released .lock-extra::after,
.btn-danger.released .lock-extra::after { bottom: 4px; left: 4px; }

/* Button-specific base colors */
.btn-deploy {
    border: 1px solid var(--accent);
    background: linear-gradient(135deg, rgba(0, 255, 65, 0.12), rgba(0, 255, 65, 0.03));
    color: var(--accent);
    text-shadow: 0 0 8px var(--accent-dim);
}

.btn-secondary {
    border: 1px solid rgba(255, 176, 0, 0.4);
    background: linear-gradient(135deg, rgba(255, 176, 0, 0.1), rgba(255, 176, 0, 0.03));
    color: var(--money);
    text-shadow: 0 0 8px var(--money-glow);
}

.btn-danger {
    border: 1px solid rgba(255, 51, 102, 0.4);
    background: linear-gradient(135deg, rgba(255, 51, 102, 0.1), rgba(255, 51, 102, 0.03));
    color: var(--danger);
    text-shadow: 0 0 8px var(--danger-glow);
}

/* Button-specific hover crosshairs */
.btn-deploy:hover {
    border-color: rgba(0, 255, 65, 0.45);
    background:
        linear-gradient(90deg, transparent 48%, rgba(0,255,65,0.07) 49%, rgba(0,255,65,0.07) 51%, transparent 52%),
        linear-gradient(0deg, transparent 48%, rgba(0,255,65,0.07) 49%, rgba(0,255,65,0.07) 51%, transparent 52%),
        linear-gradient(135deg, rgba(0, 255, 65, 0.12), rgba(0, 255, 65, 0.03));
}

.btn-secondary:hover {
    border-color: rgba(255, 176, 0, 0.5);
    background:
        linear-gradient(90deg, transparent 48%, rgba(255,176,0,0.07) 49%, rgba(255,176,0,0.07) 51%, transparent 52%),
        linear-gradient(0deg, transparent 48%, rgba(255,176,0,0.07) 49%, rgba(255,176,0,0.07) 51%, transparent 52%),
        linear-gradient(135deg, rgba(255, 176, 0, 0.1), rgba(255, 176, 0, 0.03));
}

.btn-danger:hover {
    border-color: rgba(255, 51, 102, 0.5);
    background:
        linear-gradient(90deg, transparent 48%, rgba(255,51,102,0.07) 49%, rgba(255,51,102,0.07) 51%, transparent 52%),
        linear-gradient(0deg, transparent 48%, rgba(255,51,102,0.07) 49%, rgba(255,51,102,0.07) 51%, transparent 52%),
        linear-gradient(135deg, rgba(255, 51, 102, 0.1), rgba(255, 51, 102, 0.03));
}

@keyframes lockPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.9; }
    50% { transform: translate(-50%, -50%) scale(1.4); opacity: 0.5; }
}

@keyframes lockBreath {
    0%   { opacity: 0.04; }
    100% { opacity: 0.16; }
}


/* ===== Breathing sonar glow on buttons ===== */
.btn-deploy { animation: breatheGreen 4s ease-in-out infinite; }
.btn-secondary { animation: breatheAmber 4s ease-in-out infinite; }
.btn-danger { animation: breatheRed 4s ease-in-out infinite; }

@keyframes breatheGreen {
    0%, 100% { box-shadow: 0 0 0 rgba(0,255,65,0), inset 0 0 0 rgba(0,255,65,0); }
    50% { box-shadow: 0 0 20px rgba(0,255,65,0.12), inset 0 0 12px rgba(0,255,65,0.05); }
}
@keyframes breatheAmber {
    0%, 100% { box-shadow: 0 0 0 rgba(255,176,0,0), inset 0 0 0 rgba(255,176,0,0); }
    50% { box-shadow: 0 0 20px rgba(255,176,0,0.10), inset 0 0 12px rgba(255,176,0,0.04); }
}
@keyframes breatheRed {
    0%, 100% { box-shadow: 0 0 0 rgba(255,51,102,0), inset 0 0 0 rgba(255,51,102,0); }
    50% { box-shadow: 0 0 20px rgba(255,51,102,0.10), inset 0 0 12px rgba(255,51,102,0.04); }
}

@keyframes btnSweep {
    0% { background-position: 0 0, -125% 0; }
    100% { background-position: 0 0, 125% 0; }
}

.shop-btn.affordable { animation: breatheGreen 4s ease-in-out infinite; }
.shop-btn.unaffordable { animation: breatheRed 4s ease-in-out infinite; }
.shop-btn.maxed { animation: breatheAmber 4s ease-in-out infinite; }

.btn-disabled {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    backdrop-filter: blur(12px);
}

.stat-label {
    display: block;
    font-family: var(--font-term);
    font-size: 0.875rem;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    margin-bottom: 0.5rem;
}

.stat-value {
    display: block;
    font-family: var(--font-term);
    font-size: 2.2rem;
    font-weight: 400;
    color: var(--accent);
    text-shadow: 0 0 12px var(--accent-dim);
}

/* Earnings */
.earnings-card {
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.08), rgba(251, 191, 36, 0.02));
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-radius: var(--radius);
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.earnings-label {
    font-family: var(--font-term);
    font-size: 0.875rem;
    letter-spacing: 0.08em;
    color: var(--text-dim);
}

.earnings-value {
    font-family: var(--font-term);
    font-size: 2rem;
    font-weight: 400;
    color: var(--money);
    text-shadow: 0 0 12px var(--money-glow);
}

/* High Scores */
.highscores {
    margin-bottom: 2rem;
    text-align: left;
}

.highscores-title {
    font-family: var(--font-term);
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    margin-bottom: 0.75rem;
    text-align: center;
}

.hs-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
    font-size: 0.875rem;
}

.hs-rank {
    font-family: var(--font-term);
    color: var(--accent);
    width: 32px;
    font-size: 1.1rem;
}

.hs-score {
    font-family: var(--font-term);
    font-size: 1.1rem;
    color: var(--text);
    flex: 1;
}

.hs-meta {
    color: var(--text-dim);
    font-size: 0.9rem;
    font-family: var(--font-term);
    letter-spacing: 0.05em;
}

/* ===== Shop ===== */
#shop-screen {
    justify-content: flex-start;
    padding: 0;
    overflow-y: auto;
    align-items: center;
}

.shop-content {
    max-width: 960px;
    width: 100%;
    padding: 2rem 2.5rem 2.5rem;
    overflow-y: visible;
    max-height: none;
    margin: 0 auto;
    align-self: center;
    display: flex;
    flex-direction: column;
    height: 100vh;
    justify-content: space-between;
    gap: 1.5rem;
}

.shop-funds {
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.08), rgba(251, 191, 36, 0.02));
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-radius: var(--radius);
    padding: 1rem 1.5rem;
    margin-bottom: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.shop-funds-label {
    font-family: var(--font-term);
    font-size: 0.875rem;
    letter-spacing: 0.08em;
    color: var(--text-dim);
}

.shop-funds-value {
    font-family: var(--font-term);
    font-size: 2rem;
    font-weight: 400;
    color: var(--money);
    text-shadow: 0 0 12px var(--money-glow);
}

.shop-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 1.5rem;
    flex: 1;
    align-content: start;
    margin-bottom: 0;
    min-height: 0;
}

.shop-card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    backdrop-filter: blur(12px);
    text-align: left;
    position: relative;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.shop-card:hover {
    border-color: rgba(0, 255, 65, 0.45);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25), 0 0 20px rgba(0, 255, 65, 0.06);
}

.shop-card-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    filter: grayscale(0.2);
}

.shop-card-title {
    font-family: var(--font-term);
    font-size: 1.1rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    color: var(--accent);
    margin-bottom: 0.25rem;
    text-shadow: 0 0 6px var(--accent-dim);
}

.shop-card-desc {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 0.75rem;
    line-height: 1.4;
    flex: 1;
}

.shop-card-levels {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 0.75rem;
}

.shop-level-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transition: background var(--transition);
}

.shop-level-dot.active {
    background: var(--accent);
    box-shadow: 0 0 6px var(--accent-dim);
}

.shop-level-dot.max {
    background: var(--money);
    box-shadow: 0 0 6px var(--money-glow);
}

.shop-card-info {
    font-family: var(--font-term);
    font-size: 0.85rem;
    color: var(--accent-cyan);
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
    text-shadow: 0 0 4px var(--accent-cyan-dim);
}

.shop-btn {
    width: 100%;
    font-family: var(--font-term);
    font-size: 0.95rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    padding: 0.5rem 0;
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    background: linear-gradient(135deg, rgba(0, 255, 65, 0.12), rgba(0, 255, 65, 0.04));
    color: var(--accent);
    cursor: pointer;
    transition: var(--transition);
    text-shadow: 0 0 6px var(--accent-dim);
    position: relative;
    overflow: hidden;
}

.shop-btn.affordable:hover {
    box-shadow: 0 0 16px var(--accent-dim);
    border-color: rgba(0, 255, 65, 0.5);
    transform: translateY(-1px);
    animation: none;
}

.shop-btn.unaffordable:hover {
    box-shadow: 0 0 16px rgba(255, 51, 102, 0.12);
    border-color: rgba(255, 51, 102, 0.6);
}

.shop-btn.maxed:hover {
    box-shadow: 0 0 16px rgba(255, 176, 0, 0.12);
    border-color: rgba(255, 176, 0, 0.6);
    transform: translateY(-1px);
    animation: none;
}

.shop-btn.affordable {
    border-color: var(--accent);
}

.shop-btn.unaffordable {
    border-color: rgba(255, 51, 102, 0.4);
    background: linear-gradient(135deg, rgba(255, 51, 102, 0.08), rgba(255, 51, 102, 0.02));
    color: var(--danger);
    cursor: not-allowed;
    opacity: 0.65;
}

.shop-btn.unaffordable::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(255,51,102,0.30), transparent 55%);
    opacity: 0;
    transform: scale(0.4);
    transition: opacity 0.12s ease, transform 0.12s ease;
    pointer-events: none;
}

.shop-btn.unaffordable:active::after {
    opacity: 1;
    transform: scale(1);
}

.shop-btn.unaffordable:active {
    transform: translateY(0) scale(0.96);
    transition-duration: 0.05s;
}

/* Glitch flicker on unaffordable buttons */
.shop-btn.unaffordable:hover {
    animation: glitchJitterHover 0.25s infinite;
    border-color: var(--danger);
    box-shadow: 0 0 20px rgba(255, 51, 102, 0.2);
}

.shop-btn.unaffordable::before {
    content: attr(data-text);
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--danger);
    opacity: 0;
    pointer-events: none;
    clip-path: inset(0 0 0 0);
}

.shop-btn.unaffordable:hover::before {
    opacity: 0.85;
    animation: glitchClip 0.3s infinite linear alternate-reverse;
}

@keyframes glitchJitterHover {
    0%, 100% { transform: translateY(0); }
    20%  { transform: translate(-1px, 0.5px); }
    40%  { transform: translate(1px, -0.5px); }
    60%  { transform: translate(-0.5px, 1px); }
    80%  { transform: translate(0.5px, -1px); }
}

@keyframes glitchClip {
    0%   { clip-path: inset(0 0 80% 0); transform: translate(-2px, 0); }
    25%  { clip-path: inset(40% 0 20% 0); transform: translate(2px, 0); }
    50%  { clip-path: inset(10% 0 60% 0); transform: translate(-1px, 0); }
    75%  { clip-path: inset(70% 0 5% 0); transform: translate(1px, 0); }
    100% { clip-path: inset(30% 0 40% 0); transform: translate(0, 0); }
}

.shop-btn.maxed {
    border-color: rgba(255, 176, 0, 0.4);
    background: linear-gradient(135deg, rgba(255, 176, 0, 0.08), rgba(255, 176, 0, 0.02));
    color: var(--money);
    cursor: default;
}

/* Hover sweep + click burst on affordable buttons */
.shop-btn.affordable::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 255, 65, 0.22), transparent),
                linear-gradient(90deg, transparent 0%, transparent 35%, rgba(0,255,65,0.10) 50%, transparent 65%, transparent 100%);
    background-size: 100% 100%, 250% 100%;
    background-position: 0 0, 0 0;
    opacity: 0;
    transition: opacity var(--transition);
    pointer-events: none;
}
.shop-btn.affordable:hover::before {
    opacity: 1;
    animation: btnSweep 2.2s linear infinite;
}
.shop-btn.affordable::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(0,255,65,0.35), transparent 55%);
    opacity: 0;
    transform: scale(0.4);
    transition: opacity 0.12s ease, transform 0.12s ease;
    pointer-events: none;
}
.shop-btn.affordable:active::after {
    opacity: 1;
    transform: scale(1);
}
.shop-btn.affordable:active {
    transform: translateY(0) scale(0.96);
    transition-duration: 0.05s;
}

/* Hover sweep on maxed buttons */
.shop-btn.maxed::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 176, 0, 0.22), transparent),
                linear-gradient(90deg, transparent 0%, transparent 35%, rgba(255,176,0,0.10) 50%, transparent 65%, transparent 100%);
    background-size: 100% 100%, 250% 100%;
    background-position: 0 0, 0 0;
    opacity: 0;
    transition: opacity var(--transition);
    pointer-events: none;
}
.shop-btn.maxed:hover::before {
    opacity: 1;
    animation: btnSweep 2.2s linear infinite;
}

.shop-card.super {
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.12), rgba(6, 6, 11, 0.6));
    border-color: rgba(168, 85, 247, 0.4);
}

.shop-card.super:hover {
    border-color: rgba(168, 85, 247, 0.7);
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.15), 0 8px 32px rgba(0, 0, 0, 0.25);
}

.shop-card.super .shop-card-title {
    color: #d8b4fe;
}

.shop-card.super .shop-card-icon {
    filter: drop-shadow(0 0 6px rgba(168, 85, 247, 0.4));
}

/* ===== Sonar ring + ambient glow on cards ===== */
@keyframes sonarPulse {
    0% { transform: scale(0.96); opacity: 0.45; }
    100% { transform: scale(1.12); opacity: 0; }
}

@keyframes ambientGlow {
    0%, 100% { box-shadow: 0 0 0 rgba(0, 255, 65, 0); }
    50% { box-shadow: 0 0 18px rgba(0, 255, 65, 0.06); }
}

@keyframes ambientGlowSuper {
    0%, 100% { box-shadow: 0 0 0 rgba(168, 85, 247, 0); }
    50% { box-shadow: 0 0 18px rgba(168, 85, 247, 0.06); }
}

.stat-card, .earnings-card {
    position: relative;
}

.shop-card::before,
.stat-card::before,
.earnings-card::before {
    content: '';
    position: absolute;
    inset: -2px;
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    opacity: 0;
    transform: scale(0.96);
    pointer-events: none;
}

.shop-card::after,
.stat-card::after,
.earnings-card::after {
    content: '';
    position: absolute;
    inset: -2px;
    border: 1px solid var(--accent-cyan);
    border-radius: var(--radius);
    opacity: 0;
    transform: scale(0.96);
    pointer-events: none;
}

.shop-card {
    animation: ambientGlow 5s ease-in-out infinite;
}

.shop-card.super {
    animation: ambientGlowSuper 5s ease-in-out infinite;
}

/* Sonar only on hover */
.shop-card:hover::before,
.stat-card:hover::before,
.earnings-card:hover::before {
    animation: sonarPulse 1.5s ease-out infinite;
}

.shop-card:hover::after,
.stat-card:hover::after,
.earnings-card:hover::after {
    animation: sonarPulse 1.5s ease-out infinite;
    animation-delay: 0.75s;
}

/* ===== HUD ===== */
.hud {
    position: fixed;
    inset: 0;
    z-index: 10;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 1rem 1.5rem;
}

.hud-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    flex-wrap: wrap;
}

.hud-panel {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    backdrop-filter: blur(16px);
    pointer-events: auto;
    transition: var(--transition);
    position: relative;
    animation: panelPulse 4s ease-in-out infinite;
}

.hud-panel::before {
    content: '';
    position: absolute;
    inset: -2px;
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    opacity: 0;
    transform: scale(0.96);
    animation: sonarPulse 6s ease-out infinite;
    pointer-events: none;
}

.hud-panel::after {
    content: '';
    position: absolute;
    top: 5px;
    right: 5px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 4px var(--accent);
    animation: ledBlink 2s step-end infinite;
    pointer-events: none;
}

@keyframes ledBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.25; }
}

@keyframes panelPulse {
    0%, 100% { box-shadow: 0 0 0 rgba(0, 255, 65, 0); }
    50% { box-shadow: 0 0 16px rgba(0, 255, 65, 0.04); }
}

.hud-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.hud-row:last-child {
    margin-bottom: 0;
}

.hud-label {
    font-family: var(--font-term);
    font-size: 0.85rem;
    letter-spacing: 0.06em;
    color: var(--text-dim);
    min-width: 56px;
}

.hud-value {
    font-family: var(--font-term);
    font-size: 1.3rem;
    font-weight: 400;
    color: var(--accent);
    text-shadow: 0 0 10px var(--accent-dim);
}

.hud-value.funds {
    color: var(--money);
    text-shadow: 0 0 10px var(--money-glow);
}

.hud-center {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1.25rem;
}

.bomb-timer {
    position: relative;
    width: 40px;
    height: 40px;
}

.bomb-timer svg {
    width: 100%;
    height: 100%;
    overflow: visible;
}

.bomb-timer circle {
    transition: stroke 0.3s ease;
}

.bomb-timer text {
    transition: fill 0.3s ease;
}

.radar-ping {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
    animation: ping 2s ease-out infinite;
}

@keyframes ping {
    0% { transform: scale(1); opacity: 1; }
    75% { transform: scale(2.5); opacity: 0; }
    100% { transform: scale(1); opacity: 0; }
}

.hud-status {
    font-family: var(--font-term);
    font-size: 0.95rem;
    letter-spacing: 0.08em;
    color: var(--text);
    text-shadow: 0 0 6px rgba(0, 255, 65, 0.15);
}

.health-bar {
    width: 120px;
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.health-fill {
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-cyan));
    border-radius: 3px;
    transition: width 0.3s ease, background 0.3s ease;
    box-shadow: 0 0 8px var(--accent-dim);
}

.health-fill.warning {
    background: linear-gradient(90deg, var(--warning), var(--danger));
    box-shadow: 0 0 8px var(--danger-glow);
    animation: healthPulse 0.6s ease-in-out infinite alternate;
}

.health-fill.critical {
    background: linear-gradient(90deg, var(--danger), #ff0000);
    box-shadow: 0 0 12px var(--danger-glow);
    animation: healthPulse 0.4s ease-in-out infinite alternate;
}

@keyframes healthPulse {
    from { opacity: 1; }
    to   { opacity: 0.5; }
}

/* Heat Overlay (red vignette during overheat) */
.heat-overlay {
    position: fixed;
    inset: 0;
    z-index: 5;
    pointer-events: none;
    background: radial-gradient(ellipse at center, rgba(239, 68, 68, 0) 0%, rgba(239, 68, 68, 0) 100%);
    transition: background 0.15s ease;
}

.heat-overlay.active {
    background: radial-gradient(ellipse at center, rgba(239, 68, 68, 0) 40%, rgba(239, 68, 68, 0.12) 100%);
    animation: heatVignette 0.6s ease-in-out infinite alternate;
}

@keyframes heatVignette {
    from { background: radial-gradient(ellipse at center, rgba(239, 68, 68, 0) 40%, rgba(239, 68, 68, 0.08) 100%); }
    to   { background: radial-gradient(ellipse at center, rgba(239, 68, 68, 0) 40%, rgba(239, 68, 68, 0.16) 100%); }
}

.zoom-value {
    font-size: 0.875rem;
    opacity: 0.85;
}

.hud-bottom {
    display: flex;
    justify-content: center;
}

.hud-hint {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.5rem 1rem;
    opacity: 0.6;
}

.hint-key {
    font-family: var(--font-term);
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--accent);
    background: rgba(0, 255, 65, 0.08);
    border: 1px solid rgba(0, 255, 65, 0.18);
    border-radius: 2px;
    padding: 0.125rem 0.375rem;
    letter-spacing: 0.05em;
}

.hint-text {
    font-size: 0.75rem;
    color: var(--text-dim);
}

.hint-divider {
    width: 1px;
    height: 12px;
    background: var(--border);
}

/* Power-up Indicator */
.powerup-indicator {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
    display: none;
    animation: fadeUp 0.4s ease-out;
}

.powerup-badge {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 100px;
    padding: 0.5rem 1.25rem;
    backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 0 20px rgba(0,0,0,0.3);
}

.powerup-name {
    font-family: var(--font-term);
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    color: var(--accent);
    text-shadow: 0 0 6px var(--accent-dim);
}

.powerup-bar {
    width: 80px;
    height: 4px;
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
    overflow: hidden;
}

.powerup-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.1s linear;
}

/* Wave Banner */
.wave-banner {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 50;
    pointer-events: none;
    animation: waveSlide 2.5s ease-out forwards;
}

@keyframes waveSlide {
    0%   { opacity: 0; transform: translate(-50%, -50%) scale(0.8); filter: blur(4px); }
    15%  { opacity: 1; transform: translate(-50%, -50%) scale(1); filter: blur(0px); }
    70%  { opacity: 1; transform: translate(-50%, -50%) scale(1); }
    100% { opacity: 0; transform: translate(-50%, -50%) scale(1.1); filter: blur(2px); }
}

.wave-text {
    font-family: var(--font-term);
    font-size: 3.2rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    color: var(--accent);
    text-shadow: 0 0 40px var(--accent-dim), 0 0 80px rgba(0, 255, 65, 0.15);
    position: relative;
    display: inline-block;
}

.wave-text::before {
    content: attr(data-text);
    position: absolute;
    left: 0;
    top: 0;
    color: #ff3366;
    opacity: 0.6;
    animation: glitch 1.5s infinite linear alternate-reverse;
    clip-path: inset(0 0 0 0);
    z-index: -1;
}

.wave-text::after {
    content: attr(data-text);
    position: absolute;
    left: 0;
    top: 0;
    color: #22d3ee;
    opacity: 0.5;
    animation: glitch 1.2s infinite linear alternate-reverse;
    clip-path: inset(0 0 0 0);
    z-index: -2;
}

/* Pause Menu */
#pause-menu .screen-content {
    max-width: 420px;
}

.pause-row {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
}

.pause-row .btn {
    width: 100%;
}

/* ===== Responsive ===== */
@media (max-width: 640px), (max-height: 600px) {
    .hud-top {
        flex-direction: column;
        align-items: stretch;
    }

    .hud-panel {
        width: 100%;
    }

    .hud-center {
        order: -1;
        justify-content: center;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .screen-title {
        font-size: 1.75rem;
    }

    .wave-text {
        font-size: 1.5rem;
    }

    .hud-hint {
        display: none;
    }

    .powerup-indicator {
        bottom: 60px;
    }

    #shop-screen {
        justify-content: flex-start;
        padding: 1rem 0;
        overflow-y: auto;
    }

    .shop-content {
        height: auto;
        justify-content: flex-start;
        padding: 1.5rem 1rem 2.5rem;
        gap: 1.25rem;
    }

    .shop-grid {
        flex: 0 0 auto;
        align-content: start;
    }

    .btn-row {
        flex-direction: column;
        width: 100%;
    }

    .btn-deploy, .btn-secondary {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}