:root {
    --bg-dark: #050608;
    --panel-bg: rgba(9, 15, 23, 0.75);
    --panel-border: rgba(0, 255, 255, 0.3);
    --neon-cyan: #0ff;
    --neon-cyan-glow: 0 0 10px rgba(0, 255, 255, 0.6);
    --neon-blue: #0088ff;
    --neon-orange: #ff8800;
    --neon-green: #00ff66;
    --neon-red: #ff3333;
    
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Rajdhani', sans-serif;
}

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

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--bg-dark);
    color: #fff;
    font-family: var(--font-body);
    font-size: 16px;
}

.hidden {
    display: none !important;
}

/* === Canvas Engine === */
#game-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    background-color: #000;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
}

/* === UI Layer (Holographic) === */
#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none; /* Let clicks pass through natively */
}

/* Let specific UI elements catch clicks */
.holo-panel, .action-btn, #alert-system {
    pointer-events: auto;
}

/* Generic Holo Panel Style */
.holo-panel {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    backdrop-filter: blur(8px) brightness(1.2);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.1), inset 0 0 10px rgba(0,255,255,0.05);
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

.holo-panel::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
}

.holo-text {
    font-family: var(--font-heading);
    color: var(--neon-cyan);
    text-shadow: var(--neon-cyan-glow);
    letter-spacing: 2px;
}

/* === Top Dashboard (Resources) === */
.top-dashboard {
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 20px;
    padding: 10px 30px;
    border-radius: 30px;
}

.resource-group {
    display: flex;
    align-items: center;
    gap: 10px;
    position: relative;
}

.res-icon {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.1);
}

.oxy-glow { color: var(--neon-blue); box-shadow: 0 0 10px var(--neon-blue); border-color: var(--neon-blue); }
.food-glow { color: var(--neon-green); box-shadow: 0 0 10px var(--neon-green); border-color: var(--neon-green); }
.energy-glow { color: var(--neon-orange); box-shadow: 0 0 10px var(--neon-orange); border-color: var(--neon-orange); }
.pop-glow { color: #fff; box-shadow: 0 0 10px #fff; }

.res-info {
    display: flex;
    flex-direction: column;
}

.res-label {
    font-family: var(--font-heading);
    font-size: 0.6rem;
    color: #888;
    letter-spacing: 1px;
}

.res-value {
    font-weight: 700;
    font-size: 1.2rem;
    min-width: 60px;
}

.flow-indicator {
    position: absolute;
    bottom: -15px;
    right: 0;
    font-size: 0.75rem;
    font-weight: bold;
    opacity: 0.8;
}

.flow-indicator.positive { color: var(--neon-green); }
.flow-indicator.negative { color: var(--neon-red); }

/* === Side Panel (Level Info) === */
.level-panel {
    position: absolute;
    top: 90px;
    right: 20px;
    width: 250px;
    padding: 15px;
}

.level-header {
    font-family: var(--font-heading);
    color: #fff;
    font-size: 1.2rem;
    border-bottom: 1px solid var(--neon-cyan);
    padding-bottom: 5px;
    margin-bottom: 10px;
}

.planet-info {
    margin-bottom: 15px;
}

.planet-weather {
    font-size: 0.85rem;
    color: var(--neon-orange);
}

.goal-box {
    background: rgba(0,0,0,0.5);
    padding: 10px;
    border-radius: 4px;
    border-left: 3px solid var(--neon-green);
}

.goal-label {
    font-size: 0.7rem;
    color: #aaa;
}

.goal-text {
    font-size: 0.9rem;
    font-weight: 600;
    margin: 5px 0;
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background: #222;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 5px;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-blue));
    width: 0%;
    transition: width 0.3s ease;
}

/* === Build Menu (Bottom/Left) === */
.build-menu {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 15px;
}

.menu-title {
    font-family: var(--font-heading);
    text-align: center;
    color: #888;
    font-size: 0.8rem;
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.build-grid {
    display: flex;
    gap: 15px;
}

.build-btn {
    background: rgba(0,0,0,0.4);
    border: 1px solid rgba(0,255,255,0.3);
    border-radius: 8px;
    color: #fff;
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 10px;
    width: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.build-btn:hover {
    background: rgba(0,255,255,0.1);
    border-color: var(--neon-cyan);
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,255,255,0.2);
}

.build-btn.active {
    background: rgba(0,255,255,0.2);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px rgba(0,255,255,0.5);
}

.build-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    filter: grayscale(1);
}

.build-btn img {
    width: 64px;
    height: 64px;
    object-fit: contain;
    margin-bottom: 5px;
    mix-blend-mode: screen;
    filter: drop-shadow(0 0 5px rgba(0,255,255,0.5));
}

.btn-info {
    text-align: center;
}

.bldg-name {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    color: var(--neon-cyan);
}

.bldg-cost {
    display: block;
    font-size: 0.65rem;
    color: #aaa;
    margin-top: 2px;
}

.cancel-build {
    text-align: center;
    margin-top: 10px;
    color: var(--neon-orange);
    font-size: 0.8rem;
    cursor: pointer;
    font-family: var(--font-heading);
}

.cancel-build:hover {
    text-shadow: 0 0 10px var(--neon-orange);
}

/* === Upgrade Panel === */
#upgrade-panel {
    position: absolute;
    top: 50%;
    left: 20px;
    transform: translateY(-50%);
    width: 280px;
    padding: 20px;
}

.upgrade-header {
    font-size: 0.7rem;
    color: #aaa;
}

#upgrade-bldg-name {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.upgrade-stats {
    background: rgba(0,0,0,0.4);
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9rem;
}

.holo-btn {
    width: 100%;
    padding: 10px;
    background: rgba(0,255,255,0.1);
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    font-family: var(--font-heading);
    cursor: pointer;
    border-radius: 4px;
    margin-bottom: 10px;
    transition: all 0.2s;
    text-transform: uppercase;
}

.holo-btn:hover {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 15px var(--neon-cyan);
}

.danger-btn {
    border-color: var(--neon-red);
    color: var(--neon-red);
    background: rgba(255,0,0,0.1);
}

.danger-btn:hover {
    background: var(--neon-red);
    color: #fff;
    box-shadow: 0 0 15px var(--neon-red);
}

/* === Alert System === */
.alert-container {
    position: absolute;
    top: 90px;
    left: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 20;
}

.alert-toast {
    background: rgba(0,0,0,0.8);
    border-left: 4px solid var(--neon-cyan);
    padding: 10px 15px;
    color: #fff;
    font-family: var(--font-body);
    font-size: 0.9rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    animation: slideInLeft 0.3s forwards, fadeOut 0.5s 3.5s forwards;
    pointer-events: none;
}

.alert-toast.warning { border-color: var(--neon-orange); }
.alert-toast.critical { border-color: var(--neon-red); color: #ffcccc;}

@keyframes slideInLeft {
    from { transform: translateX(-100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; height: auto; }
    to { opacity: 0; height: 0; margin: 0; padding: 0; border: none; }
}

/* === Overlays (Start / End / Complete) === */
.full-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.85);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.holo-modal {
    background: var(--panel-bg);
    border: 1px solid var(--neon-cyan);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 0 30px rgba(0,255,255,0.2), inset 0 0 20px rgba(0,255,255,0.1);
    text-align: center;
    max-width: 600px;
    width: 90%;
}

.danger-modal { border-color: var(--neon-red); box-shadow: 0 0 30px rgba(255,0,0,0.2); }
.success-modal { border-color: var(--neon-green); box-shadow: 0 0 30px rgba(0,255,0,0.2); }

.game-logo { margin-bottom: 30px; }

.promo-image {
    width: 100%;
    max-height: 200px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid rgba(0,255,255,0.3);
    margin-bottom: 20px;
}

.glitch {
    font-family: var(--font-heading);
    font-size: 3rem;
    color: #fff;
    text-shadow: 2px 2px 0px var(--neon-cyan), -2px -2px 0px var(--neon-red);
    letter-spacing: 5px;
    margin-bottom: 5px;
}

.subtitle {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--neon-cyan);
    letter-spacing: 15px;
}

.tutorial-box {
    text-align: left;
    background: rgba(0,0,0,0.5);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
    border-left: 2px solid var(--neon-cyan);
}

.tutorial-box h3 {
    font-family: var(--font-heading);
    color: var(--neon-cyan);
    margin-bottom: 10px;
}

.tut-list {
    margin-top: 10px;
    list-style: none;
}

.tut-list li { margin-bottom: 8px; }

.highlight.cyan { color: var(--neon-cyan); font-weight: bold;}
.highlight.orange { color: var(--neon-orange); font-weight: bold;}
.highlight.red { color: var(--neon-red); font-weight: bold;}

.ultra-btn {
    background: linear-gradient(45deg, transparent, var(--neon-cyan), transparent);
    background-size: 200% 100%;
    background-position: 100% 0;
    border: 2px solid var(--neon-cyan);
    color: #fff;
    padding: 15px 40px;
    font-family: var(--font-heading);
    font-size: 1.2rem;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.3s;
    border-radius: 4px;
    box-shadow: 0 0 15px rgba(0,255,255,0.3);
}

.ultra-btn:hover {
    background-position: 0 0;
    box-shadow: 0 0 30px rgba(0,255,255,0.6);
    text-shadow: 0 0 10px #fff;
}

.ultra-btn.danger { border-color: var(--neon-red); background-image: linear-gradient(45deg, transparent, var(--neon-red), transparent); }
.ultra-btn.danger:hover { box-shadow: 0 0 30px rgba(255,0,0,0.6); }

.ultra-btn.success { border-color: var(--neon-green); background-image: linear-gradient(45deg, transparent, var(--neon-green), transparent); }
.ultra-btn.success:hover { box-shadow: 0 0 30px rgba(0,255,0,0.6); }

.critical-alert {
    color: var(--neon-red);
    font-family: var(--font-heading);
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 0 0 15px rgba(255,0,0,0.5);
}

.success-alert {
    color: var(--neon-green);
    font-family: var(--font-heading);
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 0 0 15px rgba(0,255,0,0.5);
}

/* Toggle Switch Settings */
.settings-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
}
.setting-label {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    color: #888;
}
.switch {
    position: relative;
    display: inline-block;
    width: 40px;
    height: 20px;
}
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: #333;
    transition: .4s;
}
.slider:before {
    position: absolute;
    content: "";
    height: 12px; width: 12px;
    left: 4px; bottom: 4px;
    background-color: white;
    transition: .4s;
}
input:checked + .slider { background-color: var(--neon-cyan); box-shadow: 0 0 10px var(--neon-cyan); }
input:checked + .slider:before { transform: translateX(20px); }
.slider.round { border-radius: 20px; }
.slider.round:before { border-radius: 50%; }

/* === Responsive (Tablet / Mobile) === */
@media (max-width: 900px) {
    .top-dashboard {
        width: 100%;
        padding: 5px;
        flex-wrap: wrap;
        justify-content: center;
        border-radius: 10px;
        top: 5px;
        gap: 10px;
    }
    
    .res-icon {
        width: 25px;
        height: 25px;
        font-size: 1rem;
    }

    .res-value {
        font-size: 0.9rem;
        min-width: 40px;
    }

    .build-menu {
        bottom: 5px;
        width: 100%;
        padding: 5px;
    }

    .build-grid {
        flex-wrap: nowrap;
        justify-content: space-evenly;
        overflow-x: auto;
        gap: 5px;
        padding-bottom: 5px;
    }
    
    .build-btn {
        width: 70px;
        padding: 5px;
    }
    
    .build-btn img {
        width: 32px;
        height: 32px;
    }

    .bldg-name {
        font-size: 0.7rem;
    }
    
    .bldg-cost {
        font-size: 0.55rem;
    }
    
    .level-panel {
        top: 60px;
        right: 5px;
        width: 150px;
        padding: 10px;
    }

    .level-header {
        font-size: 0.9rem;
    }
    
    .alert-container {
        top: 60px;
        left: 5px;
        max-width: 200px;
    }
    
    #upgrade-panel {
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 90%;
        background: rgba(0,0,0,0.95);
        padding: 15px;
    }

    .holo-modal {
        padding: 20px;
        width: 95%;
    }

    .glitch {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 0.8rem;
        letter-spacing: 5px;
    }

    .promo-image {
        max-height: 120px;
    }

    .tutorial-box {
        padding: 10px;
        font-size: 0.8rem;
    }

    .ultra-btn {
        padding: 10px 20px;
        font-size: 1rem;
    }
}