:root {
    --primary-color: #00FFFF; /* Cyan */
    --bg-color: #111;
    --container-bg: #000;
    --border-color: #444;
    --text-color: #FFF;
    --ready-color: #00FF00;
    --cooldown-color: #FF4444;
}

body {
    margin: 0;
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: 'Consolas', 'Menlo', monospace;
    color: var(--text-color);
    overflow: hidden;
}

#game-container {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 20px;
}

#screen {
    width: 600px;
    height: 400px;
    background-color: var(--container-bg);
    border: 3px solid var(--border-color);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

@keyframes screen-shake {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(-2px, 2px); }
    50% { transform: translate(2px, -2px); }
    75% { transform: translate(-2px, -2px); }
}

.shake {
    animation: screen-shake 0.15s ease-in-out;
}

#logo {
    position: absolute;
    font-size: 28px;
    font-weight: bold;
    padding: 0px 0px;
    user-select: none;
    color: var(--primary-color);
    transition: transform 0.1s ease, color 0.3s ease;
    will-change: transform, left, top;
}

@keyframes nudge-animation {
    from {
        transform: scale(0);
        opacity: 0.7;
    }
    to {
        transform: scale(1.5);
        opacity: 0;
    }
}

#nudge-effect {
    position: absolute;
    width: 100px;
    height: 100px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    transform: scale(0);
    opacity: 0;
    pointer-events: none;
}

#nudge-effect.active {
    animation: nudge-animation 0.4s ease-out;
}

#ui-panel {
    display: flex;
    gap: 10px;
    width: 600px;
}

.ui-box {
    flex: 1;
    background-color: var(--container-bg);
    border: 2px solid var(--border-color);
    padding: 10px;
    text-align: center;
}

.ui-box h3 {
    margin: 0 0 5px 0;
    font-size: 14px;
    color: var(--primary-color);
}

.ui-box p {
    margin: 0;
    font-size: 20px;
    font-weight: bold;
}

#nudge-status-display.ready { color: var(--ready-color); }
#nudge-status-display.cooldown { color: var(--cooldown-color); }

/* Modal Styles */
#modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 100;
}

#modal-overlay.visible {
    opacity: 1;
    pointer-events: all;
}

#modal-content {
    background-color: var(--container-bg);
    border: 2px solid var(--primary-color);
    padding: 30px;
    width: 80%;
    max-width: 500px;
    text-align: center;
    box-shadow: 0 0 20px var(--primary-color);
}

#modal-content h2 {
    margin-top: 0;
}

#modal-content button {
    background-color: var(--primary-color);
    color: var(--bg-color);
    border: none;
    padding: 15px 30px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s ease;
    margin-top: 15px;
}

#modal-content button:hover {
    transform: scale(1.05);
}

#upgrade-selection {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.upgrade-button {
    background-color: var(--bg-color) !important;
    color: var(--text-color) !important;
    border: 2px solid var(--border-color) !important;
    text-align: left;
    padding: 15px !important;
}

.upgrade-button:hover {
    border-color: var(--primary-color) !important;
}

.upgrade-button h4 {
    margin: 0 0 5px 0;
    color: var(--primary-color);
}
.upgrade-button p {
    margin: 0;
    font-size: 14px !important;
    font-weight: normal !important;
}

#upgrade-log {
    width: 180px;
    min-height: 300px;
    max-height: 400px;
    background: var(--container-bg);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    font-size: 15px;
    font-family: inherit;
    padding: 12px 10px;
    margin-right: 18px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    box-sizing: border-box;
}