:root {
    --bg-deep: #070a12;
    --accent-a: #4dc9ff;
    --accent-b: #b388ff;
    --accent-c: #ffd93d;
    --accent-gradient: linear-gradient(135deg, var(--accent-a), var(--accent-b) 55%, var(--accent-c));
    --text-main: #eaf2ff;
    --text-dim: rgba(234, 242, 255, 0.65);
    --card-bg: rgba(77, 201, 255, 0.08);
    --card-border: rgba(77, 201, 255, 0.22);
}

* {
    box-sizing: border-box;
}

body {
    background: var(--bg-deep);
    color: var(--text-main);
    margin: 0;
    min-height: 100vh;
    font-family: 'Poppins', 'Comic Sans', cursive;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.bg-glow {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(45rem 45rem at 15% 10%, rgba(77, 201, 255, 0.18), transparent 60%),
        radial-gradient(35rem 35rem at 90% 15%, rgba(179, 136, 255, 0.18), transparent 60%),
        linear-gradient(180deg, rgba(7, 10, 18, 0.9), rgba(7, 10, 18, 0.98));
}

.back-link {
    position: fixed;
    top: 1.25rem;
    left: 1.25rem;
    z-index: 2;
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.9rem;
    background: rgba(77, 201, 255, 0.06);
    border: 1px solid var(--card-border);
    padding: 0.5rem 1rem;
    border-radius: 0.75rem;
    backdrop-filter: blur(10px);
    transition: color 0.2s ease, border-color 0.2s ease;
}

.back-link:hover {
    color: var(--text-main);
    border-color: rgba(255, 255, 255, 0.3);
}

.game-shell {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.hud-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.6rem;
}

.hud-chip {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 0.75rem;
    padding: 0.4rem 0.9rem;
    font-size: 0.85rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
}

.hud-chip span {
    color: var(--accent-c);
}

.canvas-wrap {
    position: relative;
    width: min(70vw, calc(78vh * 0.5), 340px);
    aspect-ratio: 260 / 520;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 25px 60px -25px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(255, 255, 255, 0.14);
}

#game-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.touch-controls {
    display: none;
    width: 100%;
    max-width: 640px;
    align-items: center;
    justify-content: space-between;
    padding: 0 0.5rem;
    user-select: none;
}

@media (hover: none), (pointer: coarse) {
    .touch-controls {
        display: flex;
    }
}

.dpad {
    position: relative;
    width: 9.5rem;
    height: 9.5rem;
}

.dpad--row3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: auto;
    height: auto;
}

.dpad--row3 .dpad-btn {
    position: static;
}

.dpad-btn {
    position: absolute;
    width: 3.1rem;
    height: 3.1rem;
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-main);
    font-size: 1.1rem;
    border-radius: 0.75rem;
    backdrop-filter: blur(10px);
    touch-action: none;
    cursor: pointer;
}

.dpad-btn:active,
.dpad-btn.is-pressed {
    background: var(--accent-gradient);
    color: #0c1830;
    border-color: transparent;
}

.fire-btn {
    width: 5.5rem;
    height: 5.5rem;
    border-radius: 50%;
    border: 1px solid rgba(77, 201, 255, 0.4);
    background: var(--accent-gradient);
    color: #0c1830;
    font-weight: 800;
    font-size: 1rem;
    letter-spacing: 0.05em;
    box-shadow: 0 15px 35px -12px rgba(77, 201, 255, 0.6);
    touch-action: none;
    cursor: pointer;
}

.fire-btn:active,
.fire-btn.is-pressed {
    transform: scale(0.94);
}

.overlay {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(7, 10, 18, 0.82);
    backdrop-filter: blur(4px);
}

.overlay[hidden] {
    display: none;
}

.overlay__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.5rem;
    gap: 0.6rem;
}

.overlay__title {
    font-size: 1.4rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.overlay__desc {
    color: var(--text-dim);
    font-size: 0.9rem;
    max-width: 15rem;
}

.overlay__btn {
    margin-top: 0.5rem;
    background: var(--accent-gradient);
    color: #0c1830;
    border: none;
    font-family: inherit;
    font-weight: 700;
    font-size: 0.95rem;
    padding: 0.65rem 1.8rem;
    border-radius: 0.85rem;
    cursor: pointer;
}