:root {
    --primary: #e1ba1e;
    --secondary: #27ae60; 
    --dark: #2c3e50;
    --light: #ecf0f1;
    --accent: #e67e22;
    --research: #8e44ad;
}
body {
    font-family: Calibri;
    background-color: var(--light);
    color: var(--dark);
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    user-select: none;
}
h1 {
    margin: 0 0 20px 0;
    color: var(--dark);
}
.game-wrapper {
    max-width: 800px;
    width: 100%;
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    overflow: hidden;
    border: 2px solid var(--dark);
}
.header-stats {
    background: var(--dark);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.2rem;
    font-weight: bold;
}
.money-display {
    color: var(--secondary); 
    font-size: 1.5rem;
}
.canvas-wrapper {
    position: relative;
    border-bottom: 2px solid var(--dark);
}
.canvas-container {
    background: #87CEEB;
    cursor: grab;
    overflow: hidden;
}
.canvas-container:active {
    cursor: grabbing;
}
.drag-hint {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.5);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    pointer-events: none;
    z-index: 5;
}
canvas {
    display: block;
    width: 100%;
}
.tutorial-tooltip {
    position: absolute;
    background: white;
    border: 2px solid var(--primary);
    padding: 10px 15px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    transform: translate(-50%, -100%);
    margin-top: -10px;
    z-index: 20;
    pointer-events: none;
    white-space: nowrap;
    font-weight: bold;
    color: var(--dark);
}
.tutorial-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -8px;
    border-width: 8px;
    border-style: solid;
    border-color: var(--primary) transparent transparent transparent;
}
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}
.modal-content {
    background: white;
    padding: 30px;
    border-radius: 12px;
    width: 400px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}
.modal-content h2 {
    margin-top: 0;
    color: var(--primary);
    text-shadow: 1px 1px 0 #bdc3c7;
}
.modal-actions {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 15px;
}
.button-primary {
    background: var(--secondary);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
}
.button-secondary {
    background: #bdc3c7;
    color: var(--dark);
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
}
.station-control-group {
    background: white;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #cecdcd;
}
.research-group {
    grid-column: 1 / -1;
    border-color: var(--research);
}
.research-group h3 {
    border-color: var(--research);
    color: var(--research);
}
.controls {
    padding: 20px;
    background: #f8f9fa;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.upgrade-panel {
    background: white;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #ecebeb;
}
h3 {
    margin-top: 0;
    border-bottom: 2px solid var(--primary);
    padding-bottom: 5px;
}
.upgrade-button {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 10px;
    margin-bottom: 8px;
    background: white;
    border: 1px solid #bdc3c7;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s;
}
.upgrade-button:hover:not(:disabled) {
    background: rgb(224, 224, 240);
    transform: translateX(5px);
}
.upgrade-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: #dedada;
}
.button-label {
    font-weight: bold;
}
.button-sub {
    font-size: 0.85em;
    color: #6b7280;
}
.button-cost {
    color: var(--accent);
    font-size: 0.9em;
}
.business-panel {
    grid-column: 1 / -1;
    text-align: center;
    background: var(--dark);
    color: white;
    padding: 15px;
    border-radius: 8px;
}
.next-biz-button {
    background: var(--primary);
    color: var(--dark);
    border: none;
    padding: 10px 20px;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 5px;
    cursor: pointer;
    margin-left: 10px;
}
.next-biz-button:disabled {
    background: #7f8c8d;
    cursor: not-allowed;
}
.danger-button {
    background: #c0392b;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
}
.danger-button:hover {
    background: #e74c3c;
}
.dynamic-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}
@media (max-width: 600px) {
    .dynamic-grid {grid-template-columns: 1fr;}
}