:root {
    --neon-cyan: #0ff5ff;
    --neon-magenta: #ff3efc;
    --neon-yellow: #ffe066;
    --hud-bg: rgba(14, 16, 40, 0.55);
    --panel-bg: rgba(12, 12, 28, 0.85);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    color: #f7f8ff;
    background: radial-gradient(circle at center, #1b1d3c 0%, #050513 70%, #03020a 100%);
    overflow: hidden;
    height: 100vh;
    min-height: 100dvh;
    -webkit-tap-highlight-color: transparent;
}

body::before,
body::after {
    content: "";
    position: fixed;
    top: -20%;
    left: -20%;
    width: 140%;
    height: 140%;
    z-index: -2;
    background: conic-gradient(from 90deg, rgba(0, 255, 255, 0.2), rgba(255, 0, 255, 0.15), rgba(255, 255, 0, 0.25), rgba(0, 255, 255, 0.2));
    filter: blur(130px);
    animation: swirl 18s linear infinite;
}

body::after {
    animation-direction: reverse;
    opacity: 0.45;
    mix-blend-mode: screen;
}

@keyframes swirl {
    to {
        transform: rotate(360deg);
    }
}

canvas#game {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    touch-action: none;
}

.hud {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 18px;
    padding: 12px 22px;
    background: var(--hud-bg);
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.25);
    border-radius: 16px;
    backdrop-filter: blur(18px);
    z-index: 5;
}

.hud-block {
    display: flex;
    flex-direction: column;
    gap: 2px;
    align-items: center;
    width: 80px;
}


.hud-block.hud-action {
    width: auto;
    justify-content: center;
}

.hud-button {
    font-size: 0.75rem;
    letter-spacing: 1.4px;
    text-transform: uppercase;
    padding: 6px 18px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(12, 20, 48, 0.65);
    color: rgba(240, 248, 255, 0.9);
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
    box-shadow: 0 10px 26px rgba(0, 255, 255, 0.18);
}

.hud-button:hover {
    transform: translateY(-1px);
    background: rgba(36, 52, 112, 0.8);
    box-shadow: 0 16px 32px rgba(255, 62, 252, 0.28);
}

.hud-button:active {
    transform: translateY(1px);
}

.hud-button[aria-pressed="true"] {
    background: linear-gradient(120deg, var(--neon-cyan), var(--neon-magenta));
    color: #02010c;
    box-shadow: 0 16px 36px rgba(255, 62, 252, 0.35);
}

.hud-button[aria-pressed="true"]:hover {
    background: linear-gradient(120deg, var(--neon-magenta), var(--neon-yellow));
}

.hud-button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    background: rgba(20, 24, 44, 0.5);
    color: rgba(240, 248, 255, 0.55);
}

.label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 1.4px;
    color: rgba(255, 255, 255, 0.65);
}

.value {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--neon-cyan);
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.6);
}

.overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(3, 2, 10, 0.85);
    backdrop-filter: blur(30px);
    z-index: 10;
}

.overlay[hidden] {
    display: none !important;
}

.panel {
    max-width: 560px;
    padding: 36px 40px;
    border-radius: 24px;
    background: var(--panel-bg);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 25px 70px rgba(10, 5, 45, 0.45);
    text-align: center;
}

.panel h1,
.panel h2 {
    margin: 0;
    font-size: 2.4rem;
    letter-spacing: 6px;
    text-transform: uppercase;
    color: var(--neon-magenta);
    text-shadow: 0 0 22px rgba(255, 62, 252, 0.6);
}

.panel p {
    line-height: 1.6;
    color: rgba(240, 240, 255, 0.86);
}

.panel ul {
    text-align: left;
    margin: 24px 0;
    padding-left: 18px;
    color: rgba(214, 220, 255, 0.78);
}

button {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 14px 34px;
    border-radius: 999px;
    border: 2px solid transparent;
    background: linear-gradient(120deg, var(--neon-cyan), var(--neon-magenta));
    color: #02010c;
    cursor: pointer;
    box-shadow: 0 15px 45px rgba(0, 255, 255, 0.25);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

button:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 20px 60px rgba(255, 62, 252, 0.35);
}

button,
.hud-button {
    touch-action: manipulation;
}

button:active {
    transform: translateY(2px);
}

@media (max-width: 640px) {
    .hud {
        top: auto;
        bottom: 24px;
        flex-wrap: wrap;
        justify-content: center;
        padding: 10px 14px;
    }

    .hud-block {
        width: 60px;
    }

    .panel {
        margin: 20px;
        padding: 28px;
    }

    .panel ul {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .hud {
        gap: 12px;
        padding: 8px 12px;
        bottom: 16px;
    }

    .hud-block {
        width: 54px;
    }

    .label {
        font-size: 0.65rem;
    }

    .value {
        font-size: 1.15rem;
    }

    button,
    .hud-button {
        font-size: 0.95rem;
        padding: 12px 26px;
    }

    .panel {
        margin: 16px;
        padding: 24px 20px;
    }

    .panel h1,
    .panel h2 {
        font-size: 1.9rem;
        letter-spacing: 3px;
    }

    .panel ul {
        font-size: 0.9rem;
    }
}