:root {
    --primary: #4cc9f0;
    --secondary: #4895ef;
    --accent: #f72585;
    --success: #00f5d4;
    --danger: #ff0054;
    --warning: #fee440;
    --bg-dark: rgba(10, 15, 30, 0.9);
    --glass: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.15);
    --gold: linear-gradient(135deg, #ffd700, #b8860b);
    --text-light: #e2e8f0;
    --shadow-pro: 0 10px 40px -10px rgba(0,0,0,0.5);
    --inner-glow: inset 0 0 15px rgba(255,255,255,0.05);
}

* {
    margin: 0; padding: 0; box-sizing: border-box;
    user-select: none; -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Outfit', sans-serif;
    background: #020617;
    color: var(--text-light);
    overflow: hidden; height: 100vh; width: 100vw;
}

/* --- THE ATMOSPHERE --- */
#game-container {
    position: relative; width: 100%; height: 100%;
}

canvas {
    background: linear-gradient(180deg, #0f172a 0%, #020617 100%);
    transition: filter 2s ease-in-out;
}

.night-mode canvas {
    filter: brightness(0.4) saturate(1.2) contrast(1.1);
}

/* --- HUD 2.0 (Premium) --- */
.top-hud {
    position: absolute; top: 15px; left: 50%; transform: translateX(-50%);
    width: 95%; max-width: 900px; height: 75px;
    background: var(--bg-dark); backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border); border-radius: 20px;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 30px; pointer-events: auto;
    box-shadow: var(--shadow-pro), var(--inner-glow);
    z-index: 1000;
}

.hud-group {
    display: flex; gap: 25px; align-items: center;
}

.hud-item {
    display: flex; flex-direction: column; align-items: flex-start; gap: 2px;
}

.hud-label {
    font-size: 0.7rem; text-transform: uppercase; letter-spacing: 1.5px;
    color: var(--primary); font-weight: 800; opacity: 0.8;
}

.hud-value {
    font-size: 1.4rem; font-weight: 900; font-variant-numeric: tabular-nums;
    text-shadow: 0 0 10px rgba(76, 201, 240, 0.3);
}

.money-val { color: var(--success); }

/* --- BUTTONS & TABS --- */
.tab-btn {
    background: var(--glass); border: 1px solid var(--glass-border);
    font-size: 1.6rem; padding: 12px; border-radius: 12px;
    cursor: pointer; transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.tab-btn.active {
    background: var(--primary); color: white;
    transform: translateY(-8px) scale(1.1);
    box-shadow: 0 10px 20px rgba(76, 201, 240, 0.4);
}

/* --- BUILD BAR --- */
.build-menu {
    position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%);
    width: 95%; max-width: 700px;
    background: var(--bg-dark); backdrop-filter: blur(25px);
    border: 1px solid var(--glass-border); border-radius: 24px;
    padding: 20px; pointer-events: auto;
    box-shadow: var(--shadow-pro), var(--inner-glow);
}

.building-items {
    display: flex; gap: 20px; overflow-x: auto; padding-bottom: 5px;
    scrollbar-width: thin;
}

.build-card {
    flex: 0 0 110px; height: 130px; background: rgba(255,255,255,0.03);
    border: 1px solid var(--glass-border); border-radius: 18px;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    cursor: pointer; transition: all 0.2s ease;
}

.build-card:hover { 
    background: var(--glass); transform: translateY(-5px);
    border-color: var(--primary);
}

/* --- OVERLAYS --- */
.overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle, rgba(15, 23, 42, 0.8) 0%, rgba(2, 6, 23, 0.95) 100%);
    backdrop-filter: blur(15px); display: flex; align-items: center; justify-content: center;
    z-index: 2000; pointer-events: auto;
}

.overlay.hidden { display: none !important; opacity: 0; }

.premium-panel {
    background: rgba(15, 23, 42, 0.95);
    padding: 30px;
    border-radius: 40px;
    border: 2px solid var(--primary);
    text-align: center;
    max-width: 550px;
    width: 90%;
    box-shadow: 0 0 100px rgba(76, 201, 240, 0.2);
    overflow: hidden;
}

.thumb-container {
    position: relative;
    width: 100%;
    height: 180px;
    border-radius: 20px;
    margin-bottom: 25px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.hero-bg {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.7) blur(1px);
}

.hero-thumb {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90px;
    height: 90px;
    filter: drop-shadow(0 0 20px rgba(76, 201, 240, 0.8));
    animation: floating 4s ease-in-out infinite;
}

@keyframes floating { 0%, 100% { transform: translateY(0) rotate(0); } 50% { transform: translateY(-20px) rotate(2deg); } }

/* --- TYPOGRAPHY --- */
h2 { font-size: 3rem; font-weight: 900; letter-spacing: -1px; margin-bottom: 10px; }
.accent { color: var(--primary); text-shadow: 0 0 20px var(--primary); }
p { opacity: 0.7; line-height: 1.6; }

/* --- BUDGET PANEL (NEW) --- */
#budget-btn {
    position: absolute; top: 100px; left: 20px; background: var(--bg-dark);
    padding: 10px 15px; border-radius: 12px; border: 1px solid var(--glass-border);
    pointer-events: auto; cursor: pointer; font-weight: 800; font-size: 0.8rem;
}

.budget-panel {
    position: absolute; top: 150px; left: 20px; width: 250px;
    background: var(--bg-dark); backdrop-filter: blur(20px);
    border-radius: 20px; padding: 20px; border: 1px solid var(--glass-border);
    pointer-events: auto; z-index: 500;
}

.slider-group { margin: 15px 0; }
input[type=range] { width: 100%; accent-color: var(--primary); }

/* --- SHAKE --- */
@keyframes shake { 0%, 100% { transform: translate(0,0); } 25% { transform: translate(-5px, 0); } 75% { transform: translate(5px, 0); } }
.shake { animation: shake 0.1s 5; }