/* 2D Robot Arm Kinematics – local styles, no global collision */

#content_sim {
    overflow: visible;
    max-width: 800px;
    margin: 0 auto;
}

#content_sim .rk-lab {
    font-family: 'Courier New', monospace;
    max-width: 800px;
    margin: 0 auto;
    background: #0f1115;
    color: #e0e0e0;
    padding: 12px;
    box-sizing: border-box;
    overflow: visible;
    position: relative;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

#content_sim .rk-lab * {
    box-sizing: border-box;
}

/* Grid background behind canvas */
#content_sim .rk-canvas-wrap {
    position: relative;
    width: 100%;
    height: 540px;
    max-width: 800px;
    background-color: #0f1115;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
    background-size: 24px 24px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    overflow: hidden;
}

#content_sim .rk-canvas-wrap canvas {
    display: block;
    width: 100%;
    height: 100%;
    background: transparent;
}

/* Glass panel overlay */
#content_sim .rk-glass-panel {
    position: absolute;
    top: 12px;
    left: 12px;
    width: 280px;
    min-height: 530px;
    padding: 14px;
    border-radius: 10px;
    background: rgba(20, 25, 30, 0.82);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    font-family: 'Courier New', monospace;
}

#content_sim .rk-glass-panel h2 {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: #8b9bb4;
    margin: 0 0 10px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-weight: normal;
}

#content_sim .rk-control-group {
    margin-bottom: 12px;
}

#content_sim .rk-control-group label {
    font-size: 11px;
    color: #8b9bb4;
    margin-bottom: 4px;
    display: inline-block;
}

#content_sim .rk-toggle-switch {
    display: flex;
    background: rgba(0, 0, 0, 0.35);
    border-radius: 6px;
    padding: 2px;
}

#content_sim .rk-toggle-switch button {
    flex: 1;
    border: none;
    background: transparent;
    color: #8b9bb4;
    padding: 6px 8px;
    font-size: 11px;
    font-family: 'Courier New', monospace;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}

#content_sim .rk-toggle-switch button.active {
    background: #00d2ff;
    color: #0a0a0a;
    font-weight: bold;
}

#content_sim .rk-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 8px;
}

#content_sim .rk-row label {
    min-width: 58px;
    font-size: 11px;
    color: #8b9bb4;
}

#content_sim .rk-row input[type="range"] {
    flex: 1;
    min-width: 80px;
    -webkit-appearance: none;
    height: 4px;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 2px;
}

#content_sim .rk-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #00d2ff;
    cursor: pointer;
    box-shadow: 0 0 8px rgba(0, 210, 255, 0.4);
}

#content_sim .rk-row input[type="number"] {
    width: 52px;
    font-family: 'Courier New', monospace;
    font-size: 11px;
    padding: 4px 6px;
    background: rgba(0, 0, 0, 0.35);
    color: #e0e0e0;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}

#content_sim .rk-val {
    min-width: 44px;
    font-size: 11px;
    color: #00d2ff;
}

#content_sim .rk-math-display {
    background: rgba(0, 0, 0, 0.25);
    padding: 8px 10px;
    border-radius: 6px;
    border-left: 3px solid #00d2ff;
    margin-top: 12px;
    font-size: 11px;
    line-height: 1.5;
    color: #8b9bb4;
}

#content_sim .rk-math-display .rk-num {
    color: #ff79c6;
    font-weight: bold;
}

#content_sim .rk-math-display .rk-live-equation {
    font-size: 11px;
    line-height: 1.5;
    color: #8b9bb4;
    margin: 2px 0;
}

#content_sim .rk-trace-row {
    margin-top: 10px;
    margin-bottom: 6px;
}

#content_sim .rk-buttons {
    display: flex;
    flex-wrap: nowrap;
    gap: 6px;
    margin-top: 0;
    justify-content: center;
    align-items: center;
}

#content_sim .rk-trace-wrap {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: 'Courier New', monospace;
    font-size: 11px;
    color: #00d2ff;
    cursor: pointer;
    user-select: none;
}

#content_sim .rk-trace-wrap input[type="checkbox"] {
    accent-color: #00d2ff;
    cursor: pointer;
    width: 14px;
    height: 14px;
}

#content_sim .rk-btn {
    font-family: 'Courier New', monospace;
    font-size: 11px;
    height: 28px;
    padding: 0 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    background: rgba(0, 210, 255, 0.15);
    color: #00d2ff;
    border: 1px solid #00d2ff;
    border-radius: 4px;
    cursor: pointer;
}

#content_sim .rk-btn:hover {
    background: rgba(0, 210, 255, 0.25);
}

#content_sim .rk-btn.danger {
    border-color: #e06c75;
    color: #e06c75;
    background: rgba(224, 108, 117, 0.1);
}

#content_sim .rk-btn.danger:hover {
    background: rgba(224, 108, 117, 0.2);
}

#content_sim .rk-info-panels {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 12px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

#content_sim .rk-info-panel {
    width: 100%;
    background: rgba(20, 25, 30, 0.82);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 10px 12px;
    font-family: 'Courier New', monospace;
    font-size: 11px;
    color: #8b9bb4;
}

#content_sim .rk-info-panel h3 {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #00d2ff;
    margin: 0 0 8px 0;
    padding-bottom: 6px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-weight: normal;
}

#content_sim .rk-info-panel .rk-panel-content {
    line-height: 1.6;
    color: #ffffff;
}

#content_sim .rk-info-panel .rk-panel-content p {
    margin: 4px 0;
}

#content_sim .rk-info-panel .rk-matrix {
    font-size: 10px;
}

#content_sim .rk-info-panel .rk-num {
    color: #ff79c6;
    font-weight: bold;
}