:root {
    --bg: #070b16;
    --panel: #0d1224;
    --panel-2: #101833;
    --grid: rgba(60, 103, 255, 0.14);
    --cyan: #38f3ff;
    --magenta: #ff4ad8;
    --violet: #7c6bff;
    --amber: #ffb347;
    --danger: #ff5a5a;
    --text: #f5f7ff;
    --muted: #95a4cf;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
    font-family: 'Space Mono', monospace;
    color: var(--text);
    background:
        radial-gradient(circle at top, rgba(124, 107, 255, 0.15), transparent 30%),
        radial-gradient(circle at bottom, rgba(255, 74, 216, 0.10), transparent 25%),
        linear-gradient(180deg, #060811 0%, #070b16 55%, #090d1a 100%);
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(var(--grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: radial-gradient(circle at center, black 45%, transparent 100%);
    opacity: 0.55;
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0) 35%, rgba(255,255,255,0.03));
    mix-blend-mode: screen;
    opacity: 0.35;
}

.arcade-shell {
    width: min(1400px, calc(100vw - 32px));
    margin: 0 auto;
    padding: 24px 0 40px;
}

.arcade-header {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: flex-end;
    margin-bottom: 22px;
}

.eyebrow,
.card-kicker,
.overlay-kicker {
    margin: 0 0 10px;
    color: var(--cyan);
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.75rem;
}

.arcade-header h1,
.info-card h2,
.overlay-card h2 {
    font-family: 'Orbitron', sans-serif;
    margin: 0;
}

.arcade-header h1 {
    font-size: clamp(2.4rem, 5vw, 4.6rem);
    line-height: 1;
    text-shadow: 0 0 18px rgba(56, 243, 255, 0.28);
}

.intro {
    max-width: 720px;
    margin: 14px 0 0;
    color: var(--muted);
    line-height: 1.7;
}

.header-badges {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.header-badges span,
.status-grid div,
.arcade-top-link {
    border: 1px solid rgba(124, 107, 255, 0.35);
    background: rgba(13, 18, 36, 0.72);
    border-radius: 999px;
    padding: 10px 14px;
    box-shadow: inset 0 0 0 1px rgba(56, 243, 255, 0.08);
}

.arcade-top-link {
    color: var(--text);
    text-decoration: none;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.arcade-top-link:hover {
    transform: translateY(-1px);
    border-color: rgba(56, 243, 255, 0.42);
    box-shadow: 0 0 18px rgba(56, 243, 255, 0.16), inset 0 0 0 1px rgba(56, 243, 255, 0.14);
}

.game-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.65fr) minmax(320px, 0.8fr);
    gap: 22px;
    align-items: start;
}

.game-stage-panel,
.info-card {
    background: linear-gradient(180deg, rgba(16, 24, 51, 0.94), rgba(9, 13, 26, 0.94));
    border: 1px solid rgba(124, 107, 255, 0.24);
    border-radius: 28px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

.game-stage-panel { padding: 20px; }

.hud-top {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 14px;
}

.hud-block {
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(8, 12, 24, 0.85);
    border: 1px solid rgba(56, 243, 255, 0.12);
}

.hud-label {
    display: block;
    color: var(--muted);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    margin-bottom: 8px;
}

.hud-block strong {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    color: var(--text);
}

.game-frame {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid rgba(56, 243, 255, 0.2);
    background: #040712;
    box-shadow: inset 0 0 50px rgba(56, 243, 255, 0.08);
}

canvas {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    image-rendering: pixelated;
}

.overlay {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 18px;
    background: rgba(3, 6, 14, 0.76);
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.overlay-hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.overlay-visible { opacity: 1; visibility: visible; }

.overlay-card {
    width: min(540px, 100%);
    padding: 28px;
    border-radius: 24px;
    background: linear-gradient(180deg, rgba(19, 25, 49, 0.98), rgba(8, 12, 24, 0.96));
    border: 1px solid rgba(255, 74, 216, 0.26);
    text-align: center;
    box-shadow: 0 0 30px rgba(255, 74, 216, 0.12), 0 30px 80px rgba(0, 0, 0, 0.42);
}

.overlay-card.small { width: min(360px, 100%); }
.overlay-card p { color: var(--muted); line-height: 1.65; }
.overlay-kicker.danger { color: var(--danger); }
.overlay-kicker.success { color: var(--cyan); }

.countdown-overlay {
    background: rgba(3, 6, 14, 0.42);
}

.start-panel {
    display: grid;
    justify-items: center;
}

.countdown-display {
    display: grid;
    gap: 10px;
    justify-items: center;
    min-width: 180px;
}

.countdown-hidden {
    display: none;
}

.countdown-label {
    color: rgba(245, 247, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 0.24em;
    font-size: 0.8rem;
}

.countdown-display strong {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(4rem, 10vw, 7rem);
    line-height: 1;
    color: var(--amber);
    text-shadow: 0 0 28px rgba(255, 179, 71, 0.38), 0 0 56px rgba(255, 74, 216, 0.18);
}

.arcade-button {
    border: none;
    border-radius: 999px;
    padding: 14px 20px;
    font: inherit;
    font-weight: 700;
    color: #090d1a;
    background: linear-gradient(135deg, var(--cyan), var(--amber));
    cursor: pointer;
    box-shadow: 0 0 18px rgba(56, 243, 255, 0.28);
}

.arcade-button.secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid rgba(124, 107, 255, 0.35);
    box-shadow: none;
}

.highscore-form {
    display: grid;
    gap: 14px;
    margin-top: 18px;
    text-align: left;
}

.highscore-form label { color: var(--muted); font-size: 0.9rem; }
.highscore-form input {
    width: 100%;
    padding: 14px 16px;
    border-radius: 14px;
    border: 1px solid rgba(56, 243, 255, 0.2);
    background: rgba(3, 7, 18, 0.85);
    color: var(--text);
    font: inherit;
}

.form-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.form-actions.centered {
    justify-content: center;
    margin-top: 18px;
}

.sidebar {
    display: grid;
    gap: 18px;
}

.info-card {
    padding: 22px;
}

.info-card p,
.info-card li,
.note {
    color: var(--muted);
    line-height: 1.7;
}

.controls-card ul {
    list-style: none;
    padding: 0;
    margin: 16px 0 0;
    display: grid;
    gap: 12px;
}

.controls-card li {
    display: flex;
    align-items: center;
    gap: 12px;
}

.controls-card li span {
    width: 34px;
    height: 34px;
    display: inline-grid;
    place-items: center;
    border-radius: 10px;
    background: rgba(56, 243, 255, 0.12);
    border: 1px solid rgba(56, 243, 255, 0.18);
    color: var(--text);
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 18px;
}

.status-grid span {
    display: block;
    color: var(--muted);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.status-grid strong {
    font-family: 'Orbitron', sans-serif;
    color: var(--amber);
}

.highscore-list {
    list-style: none;
    padding: 0;
    margin: 18px 0 0;
    display: grid;
    gap: 10px;
}

.highscore-list li {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 14px;
    border-radius: 14px;
    background: rgba(7, 11, 22, 0.9);
    border: 1px solid rgba(255, 74, 216, 0.14);
}

.highscore-rank { color: var(--cyan); }
.highscore-name { color: var(--text); }
.highscore-score { color: var(--amber); }
.empty-score { color: var(--muted); }

@media (max-width: 1120px) {
    .game-layout { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
    .arcade-shell { width: min(100vw - 20px, 1400px); padding-top: 14px; }
    .arcade-header { flex-direction: column; align-items: flex-start; }
    .hud-top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .form-actions { flex-direction: column; }
    .arcade-button { width: 100%; }
}