:root {
    --bg-color: #111;
    --card-bg: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.15);
    --accent-color: #ff0055;
    --font-arcade: 'Press Start 2P', cursive;
    --hud-h-desktop: 60px;
    --hud-h-mobile: 52px;
    --stats-h: 32px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-arcade);
    background-color: #000;
    color: #fff;
    overflow: hidden;
}

/* ==================== GAME ROOT ==================== */
.game-root {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    background: #111;
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
}

/* ==================== 1. HUD BAR (3-Column Grid) ==================== */
.header {
    height: var(--hud-h-desktop);
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    border-bottom: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    padding: 0 16px;
    z-index: 1000;
    flex-shrink: 0;
}

.nav-left { display: flex; align-items: center; min-width: 100px; }
.home-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid #444;
    color: #888;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 10px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-arcade);
}
.home-btn:hover { color: #fff; border-color: var(--accent-color); }

.header-center { display: flex; justify-content: center; gap: 15px; }
.hud-pill {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 80px;
}
.pill-label { font-size: 8px; color: #888; margin-bottom: 4px; text-transform: uppercase; }
.pill-value { font-size: 14px; color: #ffd700; text-shadow: 2px 2px 0 #000; }

.header-right { display: flex; gap: 8px; justify-content: flex-end; min-width: 100px; }
.icon-btn {
    width: 40px; height: 40px; border-radius: 4px; background: rgba(255, 255, 255, 0.05);
    border: 2px solid #fff; color: #fff; display: flex; align-items: center;
    justify-content: center; cursor: pointer; font-size: 1.1rem; transition: all 0.2s;
}
.icon-btn:hover { border-color: var(--accent-color); transform: scale(1.05); }
.icon-btn.hidden { display: none !important; }

/* ==================== 2. STATS BAR ==================== */
.stats-bar {
    height: var(--stats-h);
    width: 100%;
    background: rgba(20, 20, 20, 0.9);
    display: grid;
    grid-template-columns: 80px 1fr 80px;
    align-items: center;
    padding: 0 15px;
    font-size: 10px;
    border-bottom: 1px solid #333;
    flex-shrink: 0;
}
.stats-left { color: #ff3333; }
.stats-right { text-align: right; color: #44aaff; }

.progress-container {
    width: 100%;
    height: 10px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid #444;
    border-radius: 5px;
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #ff0055, #ffd700, #00ffcc);
    transition: width 0.1s linear;
}

/* ==================== 3. GAME AREA ==================== */
.game-wrapper {
    flex: 1;
    position: relative;
    width: 100%;
    background: #222;
    overflow: hidden;
}

#gameCanvas {
    display: block;
    margin: 0 auto;
    background: #444;
}

/* ==================== 4. MENUS & OVERLAYS ==================== */
.menu-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
    z-index: 10;
}
.menu-overlay.hidden { display: none !important; }

h1 { font-size: 24px; margin-bottom: 20px; color: var(--accent-color); }
p { font-size: 12px; margin-bottom: 30px; line-height: 1.6; }
.controls-info { font-size: 10px; color: #888; margin-bottom: 40px; }

.menu-actions { display: flex; flex-direction: column; gap: 15px; width: 100%; max-width: 300px; }

.arcade-btn {
    background: var(--accent-color);
    color: #fff;
    border: 4px solid #fff;
    padding: 15px 30px;
    font-family: var(--font-arcade);
    font-size: 14px;
    cursor: pointer;
    box-shadow: 4px 4px 0 #000;
    width: 100%;
}
.arcade-btn:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 #000; }
.arcade-btn.outline { background: transparent; color: var(--accent-color); border-color: var(--accent-color); }

.go-stats { background: #000; border: 2px solid #444; padding: 15px; margin-bottom: 20px; width: 100%; max-width: 300px; font-size: 12px; line-height: 1.8; }

/* ==================== 5. AD CONTAINER ==================== */
.ad-container {
    width: 100%;
    max-width: 728px;
    height: 90px;
    margin: 0 auto;
    overflow: hidden;
    flex-shrink: 0;
    background: transparent;
    display: none; /* Load via script */
    align-items: center;
    justify-content: center;
    border-top: 1px solid #333;
}
.ad-container.ad-loaded { display: flex; }

/* ==================== MOBILE ==================== */
@media (max-width: 600px) {
    .header { height: var(--hud-h-mobile); padding: 0 10px; }
    .nav-left, .header-right { min-width: 80px; }
    .home-btn { padding: 6px 10px; font-size: 0; }
    .home-btn::after { content: '← Hub'; font-size: 0.8rem; }
    .stats-bar { grid-template-columns: 70px 1fr 70px; padding: 0 10px; }
    .ad-container { height: 50px; max-width: 320px; }
}

/* Modals */
.modal {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 20px;
}
.modal.hidden { display: none !important; }
.modal-content { background: #222; border: 4px solid var(--accent-color); padding: 25px; width: 100%; max-width: 400px; }
.modal-content h2 { color: var(--accent-color); font-size: 18px; margin-bottom: 20px; text-align: center; }
.modal-content ul { list-style: square; padding-left: 20px; line-height: 1.8; font-size: 11px; margin-bottom: 20px; }