body {
    margin: 0;
    padding: 0;
    background-color: #264d2a;
    color: #ffffff;
    font-family: 'Segoe UI', Arial, sans-serif;
    overflow: hidden;
}

/* Panel de estadísticas */
#stats-panel {
    background: rgba(0, 0, 0, 0.85);
    padding: 8px 20px;
    display: flex;
    justify-content: center;
    gap: 30px;
    border-bottom: 2px solid #1a331c;
    font-weight: bold;
    font-size: 15px;
}

.stat-box { display: inline-block; }
#turno-stat { color: #aaaaaa; }
#oro        { color: #ffd700; }
#ciencia    { color: #00e5ff; }
#pa         { color: #ffeb3b; }
#unidades   { color: #ff9800; }

/* Canvas */
#game-container { position: relative; }

#gameCanvas {
    display: block;
    cursor: crosshair;
    border-bottom: 4px solid #1a331c;
}

/* Ayuda de controles */
#controls-help {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.65);
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 11px;
    pointer-events: none;
    line-height: 1.9;
}

/* Panel inferior */
#ui-bottom {
    display: flex;
    height: 220px;
    background: #1a1a1a;
}

/* Consola de log */
#log-console {
    flex: 1;
    background: #000;
    color: #00ff00;
    padding: 10px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    overflow-y: auto;
    border-right: 2px solid #333;
}

#log-console div { margin-bottom: 4px; }

/* Panel de tecnologías */
#tech-panel {
    flex: 2.5;
    display: flex;
    flex-direction: column;
    background: #1a1a1a;
    overflow: hidden;
}

.section-title {
    margin: 8px 15px 4px;
    color: #aaaaaa;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

#tech-tree {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 8px 15px;
    overflow-y: auto;
}

/* Ítems del árbol de tecnologías */
.tech-item {
    width: 120px;
    min-height: 60px;
    border: 2px solid #444;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: #2a2a2a;
    transition: background 0.2s, border-color 0.2s;
    font-size: 11px;
    text-transform: uppercase;
    font-weight: bold;
    padding: 6px;
    text-align: center;
    border-radius: 3px;
}

.tech-item:hover:not(.purchased):not(.locked) {
    background: #444;
    border-color: #00ff00;
}

.tech-item.available { border-color: #2196f3; }

.tech-item.purchased {
    background: #004d40;
    border-color: #00ff00;
    color: #00ff00;
    cursor: default;
}

.tech-item.locked {
    border-color: #333;
    color: #555;
    cursor: not-allowed;
    background: #1a1a1a;
}

.tech-item small {
    font-size: 10px;
    font-weight: normal;
    text-transform: none;
    margin-top: 3px;
    opacity: 0.8;
}

/* Panel de relaciones políticas */
#relaciones-panel {
    flex: 1.5;
    display: flex;
    flex-direction: column;
    background: #1a1a1a;
    border-left: 2px solid #333;
    overflow: hidden;
}

#relaciones-container {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 8px 12px;
    overflow-y: auto;
    font-size: 11px;
}

.relacion-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 6px;
    background: #2a2a2a;
    border-radius: 3px;
    border-left: 3px solid;
}

.relacion-nombre {
    font-weight: bold;
    min-width: 100px;
    color: #ffffff;
}

.relacion-estado {
    padding: 2px 6px;
    border-radius: 2px;
    font-weight: bold;
    font-size: 10px;
    text-transform: uppercase;
    flex: 1;
}

.relacion-unidades {
    font-size: 10px;
    color: #cccccc;
    text-align: right;
    min-width: 40px;
}

.relacion-guerra {
    background: #c62828;
    color: #fff;
}

.relacion-aliado {
    background: #2e7d32;
    color: #fff;
}

.relacion-neutral {
    background: #616161;
    color: #fff;
}

/* Tooltip */
#tooltip {
    position: fixed;
    background: rgba(0, 0, 0, 0.92);
    border: 1px solid #555;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 12px;
    pointer-events: none;
    display: none;
    max-width: 230px;
    z-index: 100;
    line-height: 1.5;
}