:root {
    --cyan: #00f2ff;
    --pink: #ff00ff;
    --gold: #ffea00;
    --dark: #010103;
    --glass: rgba(10, 15, 30, 0.85);
    --border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
    touch-action: none;
}

body {
    background-color: var(--dark);
    color: white;
    font-family: 'Outfit', sans-serif;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

#app-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 1. Background System */
#global-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#global-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
    filter: blur(2px);
    animation: zoomOut 20s infinite alternate linear;
}

#scanlines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.15) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.05), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.05));
    background-size: 100% 3px, 3px 100%;
    pointer-events: none;
    z-index: 2;
}

/* 2. Responsive Canvas Scaling (ROBUST) */
#canvas-wrapper {
    position: relative;
    z-index: 10;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

#gameCanvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain; /* ENABLES ASPECT RATIO PRESERVATION WITHOUT CUT-OFF */
    display: block;
    box-shadow: 0 0 60px rgba(0,0,0,0.8);
    background: rgba(0,0,0,0.6);
}

/* 3. UI Layering (Modern Glassmorphism) */
.ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: none;
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.ui-layer.hidden, .hidden {
    display: none !important;
}

#game-hud {
    justify-content: space-around;
    align-items: flex-start;
    padding-top: 40px;
    height: auto;
    bottom: auto;
}

.hud-box {
    background: var(--glass);
    border: 1px solid var(--border);
    backdrop-filter: blur(15px);
    padding: 12px 30px;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 140px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.hud-box .label {
    font-size: 0.65rem;
    letter-spacing: 3px;
    color: var(--cyan);
    font-weight: 700;
    margin-bottom: 4px;
}

.hud-box span:not(.label) {
    font-size: 1.4rem;
    font-weight: 900;
}

/* Modals */
@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.8) translateY(30px); filter: blur(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); filter: blur(0); }
}

.glass-modal {
    pointer-events: auto;
    background: var(--glass);
    border: 1px solid var(--border);
    backdrop-filter: blur(25px);
    padding: clamp(1.5rem, 5vw, 4rem);
    border-radius: 2.5rem;
    text-align: center;
    box-shadow: 0 0 120px rgba(0,0,0,0.95);
    max-width: 90%;
    animation: fadeInScale 0.6s cubic-bezier(0.19, 1, 0.22, 1) forwards;
}

.menu-logo {
    width: 120px;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 20px var(--cyan));
}

h1 {
    font-size: 4rem;
    font-weight: 900;
    letter-spacing: 5px;
    background: linear-gradient( var(--cyan), #fff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 0.9rem;
    letter-spacing: 12px;
    margin-bottom: 3rem;
    opacity: 0.5;
}

.glow-btn {
    background: transparent;
    border: 3px solid var(--cyan);
    color: var(--cyan);
    padding: 1.25rem 4rem;
    font-size: 1.4rem;
    font-weight: 900;
    border-radius: 60px;
    cursor: pointer;
    transition: 0.3s;
    letter-spacing: 2px;
    box-shadow: 0 0 20px rgba(0, 242, 255, 0.2);
}

.glow-btn:hover {
    background: var(--cyan);
    color: #000;
    box-shadow: 0 0 50px var(--cyan);
    transform: scale(1.05);
}

.hint { margin-top: 1.5rem; opacity: 0.3; font-size: 0.8rem; letter-spacing: 2px; }

@keyframes zoomOut {
    from { transform: scale(1.1); }
    to { transform: scale(1); }
}

/* Responsive Overrides */
@media (max-width: 768px) {
    .hud-box { min-width: 100px; padding: 8px 15px; }
    .hud-box span:not(.label) { font-size: 1.1rem; }
    h1 { font-size: 2.2rem; }
    .glass-modal { padding: 2.5rem; }
}

@media (max-height: 500px) {
    .menu-logo { width: 60px; }
    #game-hud { padding-top: 10px; }
}