:root {
    --primary-color: #00e5ff;
    --secondary-color: #ff00ff;
    --bg-color: #0b0b15;
    --panel-bg: rgba(20, 20, 35, 0.85);
    --text-color: #ffffff;
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Roboto', sans-serif;
    --glow-primary: 0 0 10px rgba(0, 229, 255, 0.7);
    --glow-secondary: 0 0 10px rgba(255, 0, 255, 0.7);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, #1a1a2e 0%, #000000 100%);
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
}

#ui-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 20px;
}

#resources-panel {
    display: flex;
    justify-content: space-between;
    background: var(--panel-bg);
    padding: 15px 25px;
    border-radius: 12px;
    border: 1px solid rgba(0, 229, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    pointer-events: auto;
    max-width: 600px;
    margin: 0 auto;
}

.resource-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.label {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.value {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    text-shadow: var(--glow-primary);
}

#controls-panel {
    display: flex;
    justify-content: center;
    gap: 20px;
    pointer-events: auto;
    padding-bottom: 20px;
}

.ui-btn {
    background: linear-gradient(135deg, rgba(0, 229, 255, 0.1), rgba(0, 229, 255, 0.3));
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 12px 24px;
    font-family: var(--font-heading);
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    box-shadow: 0 0 5px rgba(0, 229, 255, 0.2);
}

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

.ui-btn:active {
    transform: scale(0.95);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 1;
    transition: opacity 0.3s ease;
    pointer-events: auto;
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background: var(--panel-bg);
    border: 1px solid var(--primary-color);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 80%;
    display: flex;
    flex-direction: column;
    box-shadow: 0 0 30px rgba(0, 229, 255, 0.2);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-family: var(--font-heading);
    color: var(--primary-color);
    text-shadow: var(--glow-primary);
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--secondary-color);
}

.scroll-area {
    padding: 20px;
    overflow-y: auto;
    flex-grow: 1;
}

/* Custom Scrollbar */
.scroll-area::-webkit-scrollbar {
    width: 8px;
}
.scroll-area::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.3);
}
.scroll-area::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.upgrade-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 8px;
    transition: background 0.2s;
}

.upgrade-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.upgrade-info h4 {
    color: var(--text-color);
    margin-bottom: 5px;
    font-family: var(--font-heading);
}

.upgrade-info p {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
}

.buy-btn {
    background: linear-gradient(to right, #2b32b2, #1488cc);
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    color: white;
    font-family: var(--font-heading);
    cursor: pointer;
    min-width: 80px;
    transition: transform 0.1s;
}

.buy-btn:disabled {
    background: #444;
    cursor: not-allowed;
    opacity: 0.7;
}

.buy-btn:not(:disabled):hover {
    filter: brightness(1.2);
}

.buy-btn:active:not(:disabled) {
    transform: scale(0.95);
}

.danger-btn {
    background: linear-gradient(to right, #cb2d3e, #ef473a);
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    color: white;
    font-family: var(--font-heading);
    cursor: pointer;
    width: 100%;
}

.danger-btn:hover {
    filter: brightness(1.2);
}

/* Floating Text Animation */
.floating-text {
    position: absolute;
    color: var(--primary-color);
    font-family: var(--font-heading);
    font-weight: bold;
    pointer-events: none;
    animation: floatUp 1s ease-out forwards;
    text-shadow: 0 0 5px rgba(0,0,0,0.5);
}

@keyframes floatUp {
    0% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    100% {
        opacity: 0;
        transform: translateY(-50px) scale(1.5);
    }
}