:root {
    --bg-dark: #0a0a1a;
    --bg-panel: #111128;
    --neon-green: #39ff14;
    --neon-cyan: #00e5ff;
    --neon-magenta: #ff00ff;
    --neon-yellow: #ffe600;
    --text-primary: #e0e0e0;
    --text-dim: #888;
    --cell-alive: #39ff14;
    --cell-dead: #181830;
    --cell-grid: #222244;
    --font-arcade: 'Press Start 2P', monospace;
    --font-mono: 'Share Tech Mono', monospace;
}

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

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-mono);
    min-height: 100vh;
}

body {
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* --- Navigation --- */
.arcade-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    background: var(--bg-panel);
    border-bottom: 2px solid var(--neon-cyan);
    box-shadow: 0 2px 20px rgba(0, 229, 255, 0.15);
}

.nav-logo {
    font-family: var(--font-arcade);
    font-size: 1rem;
    color: var(--neon-cyan);
    text-decoration: none;
    text-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
}

.nav-links { display: flex; gap: 0.5rem; }

.nav-btn {
    font-family: var(--font-arcade);
    font-size: 0.6rem;
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid var(--text-dim);
    transition: all 0.2s;
}

.nav-btn:hover {
    color: var(--neon-cyan);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 10px rgba(0, 229, 255, 0.3);
}

/* --- Footer --- */
.arcade-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: var(--bg-panel);
    border-top: 2px solid var(--neon-magenta);
    font-family: var(--font-arcade);
    font-size: 0.5rem;
    color: var(--text-dim);
}

/* --- Animations --- */
.blink { animation: blink 1.5s step-end infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.glitch {
    font-family: var(--font-arcade);
    position: relative;
    color: var(--neon-cyan);
    text-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
}
.glitch::before, .glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    opacity: 0.8;
}
.glitch::before {
    color: var(--neon-magenta);
    animation: glitch-1 2s infinite linear alternate-reverse;
    clip-path: inset(0 0 70% 0);
}
.glitch::after {
    color: var(--neon-green);
    animation: glitch-2 3s infinite linear alternate-reverse;
    clip-path: inset(70% 0 0 0);
}
@keyframes glitch-1 {
    0% { transform: translate(0); }
    20% { transform: translate(-3px, 3px); }
    40% { transform: translate(3px, -3px); }
    60% { transform: translate(-3px, -3px); }
    80% { transform: translate(3px, 3px); }
    100% { transform: translate(0); }
}
@keyframes glitch-2 {
    0% { transform: translate(0); }
    20% { transform: translate(3px, -3px); }
    40% { transform: translate(-3px, 3px); }
    60% { transform: translate(3px, 3px); }
    80% { transform: translate(-3px, -3px); }
    100% { transform: translate(0); }
}

/* --- Hero --- */
.hero { text-align: center; padding: 3rem 1rem; }
.hero .title { font-size: 2rem; margin-bottom: 1rem; }
.hero .subtitle {
    font-family: var(--font-arcade);
    font-size: 0.7rem;
    color: var(--neon-green);
    margin-bottom: 2rem;
    letter-spacing: 2px;
}
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* --- Buttons --- */
.arcade-btn {
    font-family: var(--font-arcade);
    font-size: 0.65rem;
    padding: 0.75rem 1.5rem;
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--text-dim);
    cursor: pointer;
    text-decoration: none;
    text-transform: uppercase;
    transition: all 0.15s;
    display: inline-block;
    text-align: center;
}
.arcade-btn:hover {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 15px rgba(0, 229, 255, 0.3), inset 0 0 15px rgba(0, 229, 255, 0.05);
}
.arcade-btn.primary {
    border-color: var(--neon-green);
    color: var(--neon-green);
    box-shadow: 0 0 10px rgba(57, 255, 20, 0.2);
}
.arcade-btn.primary:hover {
    background: rgba(57, 255, 20, 0.1);
    box-shadow: 0 0 20px rgba(57, 255, 20, 0.4), inset 0 0 20px rgba(57, 255, 20, 0.05);
}
.arcade-btn.active {
    border-color: var(--neon-yellow);
    color: var(--neon-yellow);
    box-shadow: 0 0 10px rgba(255, 230, 0, 0.3);
}
.arcade-btn.small { padding: 0.3rem 0.6rem; font-size: 0.55rem; }

/* --- Inputs --- */
.arcade-input {
    font-family: var(--font-mono);
    font-size: 1rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-panel);
    color: var(--neon-cyan);
    border: 2px solid var(--text-dim);
    outline: none;
    text-transform: uppercase;
}
.arcade-input:focus {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 10px rgba(0, 229, 255, 0.3);
}
.arcade-input.small { width: 80px; }
.arcade-input.code-box {
    width: 100%;
    font-size: 0.85rem;
    text-transform: none;
    resize: vertical;
    word-break: break-all;
    line-height: 1.4;
    min-height: 2.4em;
    max-height: 12em;
    overflow-y: auto;
}

.arcade-range {
    -webkit-appearance: none; appearance: none;
    background: var(--bg-panel);
    height: 6px;
    border: 1px solid var(--text-dim);
    outline: none; cursor: pointer;
}
.arcade-range::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 14px; height: 14px;
    background: var(--neon-green);
    cursor: pointer; border: none;
}

/* --- Share form --- */
.share-lookup {
    text-align: center;
    padding: 1.5rem;
    margin: 1rem 0;
    border: 1px solid var(--text-dim);
    background: var(--bg-panel);
}
.share-form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}
.share-form label {
    font-family: var(--font-arcade);
    font-size: 0.6rem;
    color: var(--neon-yellow);
}
.share-form .arcade-input {
    width: 100%;
    max-width: 500px;
    letter-spacing: 1px;
}
.code-error {
    font-family: var(--font-arcade);
    font-size: 0.55rem;
    color: var(--neon-magenta);
    margin-top: 0.75rem;
    min-height: 1em;
}

/* --- Play page --- */
.play-container { max-width: 900px; margin: 0 auto; }
.play-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.map-title {
    font-family: var(--font-arcade);
    font-size: 0.9rem;
    color: var(--neon-cyan);
}
.play-info { display: flex; gap: 0.5rem; }
.info-badge {
    font-family: var(--font-arcade);
    font-size: 0.55rem;
    padding: 0.3rem 0.6rem;
    border: 1px solid var(--text-dim);
    color: var(--text-dim);
}
.play-area {
    background: var(--cell-dead);
    border: 2px solid var(--neon-cyan);
    box-shadow: 0 0 20px rgba(0, 229, 255, 0.15);
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
    overflow: hidden;
}
.play-area canvas {
    display: block;
    max-width: 100%;
    image-rendering: pixelated;
}
.play-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: var(--bg-panel);
    border: 1px solid var(--text-dim);
}
.speed-control {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-left: auto;
}
.speed-control label {
    font-family: var(--font-arcade);
    font-size: 0.5rem;
    color: var(--text-dim);
}
#speedLabel {
    font-family: var(--font-arcade);
    font-size: 0.5rem;
    color: var(--neon-green);
    min-width: 1.5em;
}
.generation-counter, .population-counter {
    font-family: var(--font-arcade);
    font-size: 0.55rem;
    color: var(--neon-magenta);
    padding: 0.3rem 0.5rem;
    border: 1px solid var(--neon-magenta);
}
.play-share {
    padding: 0.75rem;
    margin-bottom: 1rem;
    background: var(--bg-panel);
    border: 1px solid var(--text-dim);
}
.share-row { margin-bottom: 0.75rem; }
.share-row:last-child { margin-bottom: 0; }
.share-label-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.35rem;
}
.share-label {
    font-family: var(--font-arcade);
    font-size: 0.55rem;
    color: var(--neon-yellow);
}
.play-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* --- Edit page --- */
.edit-container { max-width: 900px; margin: 0 auto; }
.edit-header { margin-bottom: 0.5rem; }
.edit-settings {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    padding: 0.75rem;
    margin-bottom: 1rem;
    background: var(--bg-panel);
    border: 1px solid var(--text-dim);
}
.form-row { display: flex; align-items: center; gap: 0.4rem; }
.form-row label {
    font-family: var(--font-arcade);
    font-size: 0.55rem;
    color: var(--neon-yellow);
    white-space: nowrap;
}
.edit-toolbar { display: flex; gap: 0.4rem; margin-bottom: 0.5rem; flex-wrap: wrap; }
.edit-area {
    background: var(--cell-dead);
    border: 2px solid var(--neon-green);
    box-shadow: 0 0 20px rgba(57, 255, 20, 0.15);
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
    overflow: hidden;
    cursor: crosshair;
}
.edit-area canvas {
    display: block;
    max-width: 100%;
    image-rendering: pixelated;
}
.edit-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1rem; }

/* --- Save result --- */
.save-result {
    font-family: var(--font-arcade);
    font-size: 0.6rem;
    padding: 0.75rem;
    margin-bottom: 1rem;
    display: none;
}
.save-result.success {
    display: block;
    color: var(--neon-green);
    border: 1px solid var(--neon-green);
    background: rgba(57, 255, 20, 0.05);
}
.save-result.error {
    display: block;
    color: var(--neon-magenta);
    border: 1px solid var(--neon-magenta);
    background: rgba(255, 0, 255, 0.05);
}
.result-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}
.result-row:last-child { margin-bottom: 0; }

/* --- Modal --- */
.modal {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.modal.hidden { display: none; }
.modal-content {
    background: var(--bg-dark);
    border: 2px solid var(--neon-cyan);
    padding: 1.5rem;
    max-width: 90vw;
    max-height: 90vh;
    overflow: auto;
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}
.modal-header h2 {
    font-family: var(--font-arcade);
    font-size: 0.8rem;
    color: var(--neon-cyan);
    margin: 0;
}
.modal-content canvas {
    display: block;
    max-width: 100%;
    margin-bottom: 1rem;
    image-rendering: pixelated;
}

/* --- Error page --- */
.error-screen { text-align: center; padding: 3rem 1rem; }
.error-screen h1 { font-size: 2rem; margin-bottom: 1rem; }
.error-screen p {
    font-family: var(--font-arcade);
    font-size: 0.6rem;
    color: var(--text-dim);
    margin-bottom: 1.5rem;
}

/* --- Utility --- */
.hidden { display: none !important; }

/* --- Scanline overlay --- */
body::after {
    content: '';
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: repeating-linear-gradient(
        0deg, transparent, transparent 2px,
        rgba(0, 0, 0, 0.03) 2px, rgba(0, 0, 0, 0.03) 4px
    );
    pointer-events: none;
    z-index: 9999;
}

/* --- Responsive --- */
@media (max-width: 600px) {
    .arcade-nav { flex-direction: column; gap: 0.5rem; text-align: center; }
    .hero .title { font-size: 1.2rem; }
    .play-controls { flex-direction: column; align-items: stretch; }
    .speed-control { margin-left: 0; justify-content: center; }
    .share-form .arcade-input { max-width: 100%; }
}